- Chain Decomposition of Aqueous Trietanolamine
-
A radiation-induced chain decomposition of aqueous triethanolamine into acetaldehyde and diethanolamine is reported.Chain length over 1000 have been observed, depending on pH, concentration, and radiation intensity.The chain propagation steps include OH group migration in the 2-hydroxy-1-(diethanolamino)ethyl radical and NR2 migration in 1-hydroxy-2-(diethanolamine)ethyl radical, each producing a 2-hydroxy-2-(diethanolamine)ethyl radical.Free-radical spectra and rate constants are given.Studies of diethanolamine and diethylethanolamine solutions gave similar free-radical spectra but much shorter chains.
- Schwarz, Harold A.
-
-
Read Online
- Lipase-catalyzed synthesis of fatty acid diethanolamides.
-
Diethanolamides are nonionic emulsifiers widely used in industries such as cosmetics and as corrosion inhibitors. Candida antarctica lipase (Novozym 435) was used to catalyze the amidation of various fatty acids with diethanolamine. Contents of fatty acid
- Liu,Nag,Shaw
-
-
Read Online
- Temperature dependency of the equilibrium constant for the formation of carbamate from diethanolamine
-
The equilibrium constant for the formation of diethanolamine carbamate was determined experimentally at (303, 313, 323, and 331) K for ionic strengths up to 1.8 mol dm-3, the inert electrolyte being NaClO4. A linear relationship was found to hold between log K and I0.5. The thermodynamical constant has been determined and expressed by the equation log K1 = -5.12 + 1.781 × 103 K/T.
- Aroua,Amor,Haji-Sulaiman
-
-
Read Online
- A Modified Method for the Determination of N-Nitrosodiethanolamine in Coconut Diethanolamide Using HPLC with Dual-Wavelength UV-Vis Detector
-
A simple and novel method based on high-performance liquid chromatography with dual-wavelength ultraviolet detection at 234 and 254 nm has been developed for the determination of underivatized N-nitrosodiethanolamine in coconut diethanolamide. The correlation coefficient obtained shows that the method is correct.
- Mostafalu, Ramin,Banaei, Abbas,Riazi, Mohammad Hadi,Ghorbani, Fatemeh
-
-
Read Online
- Boronic Ester Based Vitrimers with Enhanced Stability via Internal Boron-Nitrogen Coordination
-
Boron-containing polymers have many applications resulting from their prominent properties. Organoboron species with reversible B-O bonds have been successfully employed for the fabrication of various self-healing/healable and reprocessable polymers. However, the application of the polymers containing boronic ester or boroxine linkages is limited because of their instability to water. Herein, we report the hydrolytic stability and dynamic covalent chemistry of the nitrogen-coordinating cyclic boronic diester (NCB) linkages, and a new class of vitrimers based on NCB linkages is developed through the chemical reactions of reactive hydrogen with isocyanate. Thermodynamic and kinetic studies demonstrated that NCB linkages exhibit enhanced water and heat resistance, whereas the exchange reactions between NCB linkages can take place upon heating without any catalyst. The model compounds of NCBC-X1 and NCBC-X2 containing a urethane group and urea group, respectively, also showed higher hydrolytic stability compared to that of conventional boronic esters. Polyurethane vitrimers and poly(urea-urethane) vitrimers based on NCB linkages exhibited excellent solvent resistance and mechanical properties like general thermosets, which can be repaired, reprocessed, and recycled via the transesterification of NCB linkages upon heating. Especially, vitrimers based on NCB linkages presented improved stability to water and heat compared to those through conventional boronic esters because of the existence of N → B internal coordination. We anticipate that this work will provide a new strategy for designing the next generation of sustainable materials.
- Zhang, Xiaoting,Wang, Shujuan,Jiang, Zikang,Li, Yu,Jing, Xinli
-
supporting information
p. 21852 - 21860
(2021/01/11)
-
- PROCESS FOR PRODUCING ALKANOLAMINE
-
The present invention provides a method of producing an ethanolamine, with a low production ratio of a dialkanolamine (for example, less than 30% by weight). A process for producing an alkanolamine of the present invention includes reacting an alkylene oxide with ammonia to obtain a reaction product containing a monoalkanolamine, a dialkanolamine, and a trialkanolamine; separating the dialkanolamine from the reaction product; and recycling at least a portion of the dialkanolamine for the reaction of an alkylene oxide with ammonia, wherein in the recycling step, the dialkanolamine is supplied in a molar ratio of the alkylene oxide (moles) to a total amount (moles) of ammonia and the dialkanolamine of 0.08 or more and less than 0.26.
- -
-
Paragraph 0046-0053
(2019/02/19)
-
- ZEOLITE CATALYZED PROCESS FOR THE AMINATION OF ALKYLENE OXIDES
-
The present invention relates to a process for the conversion of ethylene oxide to 2- aminoethanol and/or Di(2-hydroxyethyl)amine comprising (i) providing a catalyst comprising a zeolitic material comprising YO2 and X2O3 in its frame- work structure, wherein Y is a tetravalent element and X is a trivalent element, wherein the zeo- litic material has a framework-type structure selected from the group consisting of MFI and/or MEL, including MEL/MFI intergrowths, and wherein the zeolitic material contains one or more rare earth elements; (ii) providing a mixture in the liquid phase comprising ethylene oxide and ammonia; (iii) contacting the catalyst provided in (i) with the mixture in the liquid phase provided in (ii) for converting ethylene oxide to 2-aminoethanol and/or Di(2-hydroxyethyl)amine, wherein the catalyst provided in (i) is obtained and/or obtainable by a process comprising load- ing one or more salts of the one or more rare earth elements into the pores of the porous structure of the zeolitic material and optionally on the surface of the zeolitic material.
- -
-
Page/Page column 24; 27-28
(2019/12/25)
-
- METHOD FOR PRODUCING CIS- AND TRANS-ENRICHED MDACH
-
A process for preparing trans-enriched MDACH, including: distilling an MDACH starting mixture in the presence of an auxiliary, which is an organic compound having a molar mass of 62 to 500 g/mol, a boiling point at least 5° C. above the boiling point of cis,cis-2,6-diamino-1-methylcyclohexane, and 2 to 4 functional groups, each of which is independently an alcohol group or a primary, secondary or tertiary amino group. The MDACH starting mixture includes 0 to 100% by weight of 2,4-MDACH and 0 to 100% by weight of 2,6-MDACH, based on the total amount of MDACH present in the MDACH starting mixture. The MDACH starting mixture includes both trans and cis isomers. Trans-enriched MDACH includes 0 to 100% by weight of 2,4-MDACH and 0 to 100% by weight of 2,6-MDACH, where the proportion of trans isomers in the mixture is higher than the proportion of trans isomers in the MDACH starting mixture.
- -
-
-
- AgI/TMG-Promoted Cascade Reaction of Propargyl Alcohols, Carbon Dioxide, and 2-Aminoethanols to 2-Oxazolidinones
-
Chemical valorization of CO2 to access various value-added compounds has been a long-term and challenging objective from the viewpoint of sustainable chemistry. Herein, a one-pot three-component reaction of terminal propargyl alcohols, CO2, and 2-aminoethanols was developed for the synthesis of 2-oxazolidinones and an equal amount of α-hydroxyl ketones promoted by Ag2O/TMG (1,1,3,3-tetramethylguanidine) with a TON (turnover number) of up to 1260. By addition of terminal propargyl alcohol, the thermodynamic disadvantage of the conventional 2-aminoethanol/CO2 coupling was ameliorated. Mechanistic investigations including control experiments, DFT calculation, kinetic and NMR studies suggest that the reaction proceeds through a cascade pathway and TMG could activate propargyl alcohol and 2-aminoethanol through the formation of hydrogen bonds and also activate CO2.
- Li, Xue-Dong,Song, Qing-Wen,Lang, Xian-Dong,Chang, Yao,He, Liang-Nian
-
p. 3182 - 3188
(2017/10/03)
-
- liquid ammonia law method for producing ethanolamine
-
The invention relates to a method for producing ethanol amine by using a liquid ammonia method, and mainly solves the technical problems that in the prior art, the reaction system is large in size, rich in byproduct, low in ammonia recycling rate, high in energy consumption and the like. The method solves the problems well by adopting the technical scheme that a three-section insulating fixed bed reactor is adopted; a reaction product is divided into three parts; after the first part of the reaction product is subjected to the first flashing, the liquid phase exchanges heat with the second part of the reaction product and is heated for the second flashing; after being subjected to heat exchange, the second part of the reaction product is further cooled down and circulated into the reactor to be used as a cold shock liquid to control the reaction temperature of the reactor; the third part of the reaction product is directly circulated back to the first section of the reactor; the liquid phase after the first part of the reaction product is subjected to the second flashing passes through an ammonia recycling tower so as to recycle the ammonia; the liquid phase of an ammonia recycling tower kettle liquid passes through a monoethanolamine distilling tower, a diethanol amine distilling tower and a triethanolamine distilling tower and is sucked out from depressurizing distillation separation side lines so as to obtain products of monoethanolamine, diethanol amine and triethanolamine. The method can be applied to industrial production of ethanol amine.
- -
-
Paragraph 0024-0028
(2017/02/09)
-
- NMR study of the composition of aqueous 2-aminoethanol solution used for absorption of carbon dioxide from fuel gases
-
The compositions of aqueous 2-aminoethanol solutions used in industry for absorption of carbon dioxide resulting from combustion of natural gas have been determined by1H and13C NMR spectroscopy. The absorption process does not involve generally accepted paths of thermal decomposition of the absorbent in the reaction with carbon dioxide, but the main path is non-oxidative decomposition of 2-aminoethanol into ammonia and ethylene oxide. Splitting of the NMR signals of carbamate anion formed by reaction of 2-aminoethanol with carbon dioxide has been rationalized by specific structure of the anion due to intramolecular hydrogen bonding.
- Talzi
-
p. 927 - 931
(2016/09/04)
-
- Carbon dioxide capture and use: Organic synthesis using carbon dioxide from exhaust gas
-
A carbon capture and use (CCU) strategy was applied to organic synthesis. Carbon dioxide (CO2) captured directly from exhaust gas was used for organic transformations as efficiently as hyper-pure CO2 gas from a commercial source, even for highly air- and moisture-sensitive reactions. The CO2 capturing aqueous ethanolamine solution could be recycled continuously without any diminished reaction efficiency. Exhaust gas is good enough! Carbon dioxide captured directly from exhaust gas was used for organic syntheses (see picture) as efficiently as hyper-pure CO2 gas from a commercial source, even for highly air- and moisture-sensitive reactions. The CO2 capturing aqueous ethanolamine solution could be recycled continuously without any diminished reaction efficiency. Copyright
- Kim, Seung Hyo,Kim, Kwang Hee,Hong, Soon Hyeok
-
supporting information
p. 771 - 774
(2014/01/23)
-
- Synthesis of pyrrole N-derivatives from oxazolidines
-
Transformations of oxazolidine derivatives synthesized from industrially produced amino alcohols, aldehydes, and ketones under basic or acidic catalysis lead to the formation of N-alkyl- and N-(hydroxyalkyl)-substituted pyrroles in 19-81% yields.
- Sadykov, E. Kh.,Stankevich,Lobanova,Klimenko
-
p. 219 - 224
(2014/04/17)
-
- Process for Preparing Piperazine
-
Process for preparing piperazine of the formula I by reacting diethanolamine (DEOA) of the formula II with ammonia (NH3) in the presence of hydrogen and a supported, metal-containing catalyst, wherein the catalytically active mass of the catalyst, prior to its reduction with hydrogen, comprises 20 to 85% by weight of oxygen-containing compounds of zirconium, calculated as ZrO2, 1 to 30% by weight of oxygen-containing compounds of copper, calculated as CuO, 14 to 70% by weight of oxygen-containing compounds of nickel, calculated as NiO, and 0 to 5% by weight of oxygen-containing compounds of molybdenum, calculated as MoO3, and the reaction is carried out in the liquid phase at an absolute pressure in the range from 160 to 220 bar, a temperature in the range from 180 to 220° C., using ammonia in a molar ratio to DEOA used of from 5 to 20 and in the presence of 0.2 to 9.0% by weight of hydrogen, based on the total amount of DEOA used and ammonia.
- -
-
Paragraph 0100-0109
(2014/01/08)
-
- Process for Preparing Piperazine
-
Process for preparing piperazine of the formula I by reacting diethanolamine (DEOA) of the formula II with ammonia in the presence of hydrogen and a supported, metal-containing catalyst has been found, wherein the catalytically active mass of the catalyst, prior to its reduction with hydrogen, comprises oxygen-containing compounds of aluminum, copper, nickel and cobalt and in the range from 0.2 to 5.0% by weight of oxygen-containing compounds of tin, calculated as SnO, and the reaction is carried out in the liquid phase at an absolute pressure in the range from 160 to 220 bar, a temperature in the range from 180 to 220° C., using ammonia in a molar ratio to DEOA used of from 5 to 25 and in the presence of 0.2 to 9.0% by weight of hydrogen, based on the total amount of DEOA used and ammonia.
- -
-
Paragraph 0109-0117
(2014/01/08)
-
- Aerobic oxidative N-dealkylation of tertiary amines in aqueous solution catalyzed by rhodium porphyrins
-
Aerobic oxidative N-dealkylation of a variety of aliphatic tertiary amines and anilines catalyzed by rhodium(iii) tetra (p-sulfonatophenyl) porphyrin ((TSPP)RhIII) is achieved in aqueous solution using dioxygen as the sole oxidant.
- Ling, Zhen,Yun, Lin,Liu, Lianghui,Wu, Bing,Fu, Xuefeng
-
supporting information
p. 4214 - 4216
(2013/05/22)
-
- PROCESS FOR PREPARING PURE TRIETHANOLAMINE (TEOA)
-
A process for preparing pure triethanolamine (TEOA) by continuously distillatively separating an ethanolamine mixture comprising TEOA and diethanolamine (DEOA), by distilling off DEOA in a distillation column (DEOA column) and supplying the resulting bottom stream comprising TEOA to a downstream column (TEOA column) in which the pure TEOA is withdrawn as a side draw stream, wherein the residence time of the ethanolamine mixture in the bottom of the DEOA column is 20 minutes.
- -
-
Page/Page column 4
(2011/10/31)
-
- Shape-selective amination of EO over HZSM-5 for MEA and DEA
-
Shape-selective amination of ethylene oxide over HZSM-5 was thoroughly investigated. TPD, FTIR and catalytic performance showed that HZSM-5 was more active than the sodium form. Relative selectivity of product was mainly controlled by the crystal size of ZSM-5. Surface modification such as silyation was effective for enhancing the shape selectivity. Among the catalysts tested in this study, HZSM-5 with SiO2/Al2O3 ratio being 76.7 exhibited the best performance. At 353 K and total pressure of 8.0 MPa the total selectivity of MEA and DEA was 97.6%, the yield reached 96.6%, the best performance achieved so far among EO amination.
- Feng, Ruming,Wang, Deju,Liu, Zhongneng,Xie, Zaiku
-
scheme or table
p. 1220 - 1223
(2011/01/03)
-
- METHODS FOR MAKING ETHANOLAMINE(S) AND ETHYLENEAMINE(S) FROM ETHYLENE OXIDE AND AMMONIA, AND RELATED METHODS
-
The present invention relates to processes for the manufacture of one or more ethanolamines and one or more ethyleneamines starting from the reaction of ethylene oxide with ammonia to produce one or more ethanolamines and the conversion of the ethanolamine(s) to ethyleneamine(s). The present invention also relates to separating alkylethyleneamines from ethyleneamines.
- -
-
Page/Page column 26; 1/4
(2010/04/28)
-
- TRANSALKOXYLATION OF NUCLEOPHILIC COMPOUNDS
-
A method of transalkoxylation of nucleophilic compounds in which an alkoxylated and a nucleophilic compound are combined in a suitable vessel and reacted in the presence of a heterogeneous catalyst under conditions capable of transferring at least one hydroxyalkyl group from the alkoxylated compound to the nucleophilic compound. The method is especially useful in the transalkoxylation of alkanolamines to transfer a hydroxyalkyl group from an alkanolamine having a greater number of hydroxyalkyl groups to an alkanolamine having a lesser number of hydroxyalkyl groups.
- -
-
Page/Page column 5; 8
(2010/04/28)
-
- METHOD FOR PRODUCING ETHYLENE AMINES ETHANOL AMINES FROM MONOETHYLENE GLYCOL (MEG)
-
A process for preparing ethylene amines and ethanolamines by hydrogenative amination of monoethylene glycol and ammonia in the presence of a catalyst, wherein the process is carried out in two process stages in which in the first process stage, the amination is carried out over a hydroamination catalyst to a monoethylene glycol conversion of not more than 40% and in the second process stage, a supported catalyst having an active composition comprising ruthenium and cobalt and no further additional metal of group VIII and also no metal of group IB is used in the form of shaped catalyst bodies which in the case of a spherical shape or rod shape in each case have a diameter of 3 mm, in the case of a pellet shape have a height of 3 mm and in the case of all other geometries in each case have an equivalent diameter L=1/a′ of 0.70 mm, is proposed.
- -
-
Page/Page column 4
(2009/10/01)
-
- METHOD FOR PRODUCING ETHYLENE AMINES AND ETHANOL AMINES BY THE HYDROGENATING AMINATION OF MONOETHYLENE GLYCOL AND AMMONIA IN THE PRESENCE OF A CATALYST
-
A process for preparing ethylene amines and ethanolamines by hydrogenative amination of monoethylene glycol and ammonia in the presence of a catalyst, wherein a catalyst having an active composition comprising ruthenium and cobalt and no further additional metal of group VIII and also no metal of group IB is used in the form of shaped catalyst bodies which in the case of a spherical shape or rod shape in each case have a diameter of s2/mmp3) and: a ′ = Ap Vp where Ap is the external surface area of the shaped catalyst body (mms2) and Vp is the volume of the shaped catalyst body (mmp3), is proposed.
- -
-
Page/Page column 4-5
(2009/02/11)
-
- 2,3,4,5-TETRAHYDRO-1H-1,5-BENZODIAZEPINE DERIVATIVE AND MEDICINAL COMPOSITION
-
The present invention has its object to provide a 2,3,4,5-tetrahydro-1H-1,5-benzodiazepine derivative represented with the Formula (1) , or the pharmaceutically acceptable salt, which is effective as a therapeutic and prophylactic agent for diabetes, diabetic nephropathy, or glomerulosclerosis.
- -
-
-
- Development of 2,2′-iminodiethanol selective production process using shape-selective pentasil-type zeolite catalyst
-
Ethanolamines are produced on an industrial scale exclusively by the reaction of ethylene oxide with an aqueous solution of ammonia. The reaction is a typical consecutive reaction with three steps; therefore, it is difficult to produce 2,2′-iminodiethanol (the second product of the reaction) with high selectivity by conventional means. We developed a catalytic 2,2′-iminodiethanol selective production process using a pentasil-type zeolite catalyst modified with rare earth elements. This highly active catalyst was able to recognize the difference at molecular level between 2,2′-iminodiethanol and 2,2′,2″-nitrilotriethanol; 2,2′,2″-nitrilotriethanol was not formed in its micropore. We also succeeded in producing a binderless molded zeolite catalyst that does not form problematic impurities and that has a shape suitable for a fixed-bed reactor. The problem of activity deterioration was overcome by developing a regeneration process using high-temperature and high-density ammonia gas as a rinse medium.
- Tsuneki, Hideaki,Kirishiki, Masaru,Oku, Tomoharu
-
body text
p. 1075 - 1090
(2009/06/06)
-
- METHOD FOR THE PRODUCTION OF ETHYLENEAMINES
-
Disclosed is a method for producing ethyleneamines, in which ethylene oxide (EO) is continuously reacted with ammonia on an inorganic ion exchanger as a heterogeneous catalyst in anhydrous conditions in a first reaction stage, the obtained reaction product containing monoethanolamine (MEOA), diethanolamine (DEOA), and triethanolamine (TEOA) at a weight ratio MEOA: DEOA: TEOA = 80 - 94: 5.9 - 15: 0.1 - 5, and the reaction product is then continuously reacted with ammonia in the presence of hydrogen and a heterogeneous hydrogenation catalyst in a second reaction stage.
- -
-
Page/Page column 9
(2010/11/24)
-
- Stability studies of some glycolamide ester prodrugs of niflumic acid in aqueous buffers and human plasma by HPLC with UV detection
-
Glycolamide esters (compounds 1-17) of 2-(3-trifluoromethyl-phenylamino) nicotinic acid (niflumic acid, CAS 4394-00-7) have been synthesized and evaluated as possible prodrugs. In-vitro hydrolysis studies were conducted at selected pH values (1.2, 3.5, 4.8, 7.4 and 7.8) and in human plasma at 37 ± 0.5 °C using HPLC with UV detection. The aqueous (pH 7.4 and 7.8) and enzymatic rates of hydrolysis were substantially affected by the nature of promoieties in this series. The compounds showed good chemical stability in the buffers of low pH values (1.2, 3.5 and 4.8) and appreciable hydrolysis under alkaline conditions and in human plasma. They exhibited long hydrolytic half-lives of 7-46 h in aqueous buffer solutions (pH 7.4 and 7.8) and 14-21 min in human plasma, respectively. It was observed that N,N-disubstituted and cyclic glycolamide derivatives showed 2 fold more hydrolysis in the alkaline pH than monosubstituted derivatives, whereas the piperidino and thiomorpholino derivatives did not undergo chemical hydrolysis. The compounds contain two possible sites for hydrolysis with an increased hydrolytic susceptibility at the terminal aliphatic carbonyl site in aqueous buffers and human plasma solutions. They were found to be cleaved at two hydrolytic carbonyls, namely the nicotinyl (2-5% in enzymatic hydrolysis) and the aliphatic site (7-55% and 70-85% in buffer and plasma hydrolysis, respectively) as revealed by HPLC analysis. The glycolamide ester prodrugs of niflumic acid underwent chemical and enzymatic hydrolysis to release mainly the metabolite 2- (3-trifluoromethyl-phenylamino) nicotinic acid carboxymethyl ester (III) and not the parent drug 2-(3-trifluoromethyl-phenylamino) nicotinic acid. The structure of the metabolite was confirmed by liquid chromatography-mass spectroscopy (LCMS). ECV · Editio Cantor Verlag.
- Talath, Sirajunisa,Shirote, Pramod J.,Lough, W. John,Gadad, Andanappa K.
-
p. 631 - 639
(2008/02/12)
-
- Pyrithione biocides enhanced by zinc metal ions and organic amines
-
The present invention is directed to a stable, soluble, antimicrobial composition concentrate comprising pyrithione or a pyrithione complex in an amount of from about 0.5% to about 30 weight percent, a zinc source in an amount of from about 0.1% to about 10%, and an organic amine component in an amount of from about 30% to about 80%, said percents being based upon the total weight of the composition concentrate. The invention is also directed to methods of controlling the growth of free-living microorganisms or biofilms using the antimicrobial composition of the invention, and products made using the antimicrobial composition of the invention.
- -
-
-
- METHOD FOR PURIFYING TRIALKANOLAMINE
-
PROBLEM TO BE SOLVED: To provide a method for producing a highly pure trialkanolamine having an excellent hue. SOLUTION: This method for purifying the trialkanolamine from alkanolamines obtained by a reaction is characterized by adding a lower boiling point compound than the boiling point of the triakanolamine to the trialkanolamine of raw material and distilling the mixture.
- -
-
Page/Page column 7
(2008/06/13)
-
- Process for producing alkanolamines
-
A process for producing an alkanolamine includes supplying a reactive distillation apparatus having an inner contacting surface which simultaneously facilitates a reaction process and a distillation process, feeding a first reactant including an amine represented by R′3-XNHX, wherein R′ is a hydrocarbon group, and X is 1, 2, or 3, feeding a second reactant including an akylene oxide represented by R″O, wherein R″ is a C2-C10-alkylene, feeding a catalyst in an amount from 0% to about 15% by weight of a mixture of the first reactant, the second reactant and the catalyst; recycling an overhead output from an overhead portion including an unreacted portion of the amine and the catalyst to achieve a substantially total reflux of the amine and the catalyst, and collecting a product output including an alkanolamine, the alkanolamine being a member selected from the group consisting of a monoalkanolamine, a dialkanolamine, and a trialkanolamine.
- -
-
-
- PROCESS FOR PREPARING ETHANOLAMINE WITH IMPROVED COLOUR
-
The present invention relates to a process for preparing an ethanolamine having an improved colour quality. The process comprises contacting ethanolamine with an activated carbon free of one or more metals chosen from Re, Ru, Rh, Pd, Os, Ir, Pt and Ag. The contacting can be carried out at a temperature of from 10 to 200°C, and during.a period sufficient to reduce the colour of the ethanolamine, in particular a period such that the colour index (as measured according to the ASTM standard D 1209) of the ethanolamine becomes equal to or less than 50 or 40 Pt/Co. The contacting can be carried out during or after the stage of preparation of the ethanolamine, preferably during or after the stage of purification of the ethanolamine. The invention also relates to a process for manufacturing a triethanolamine (TEA) having an improved colour quality, comprising a stage (i) of synthesis of the TEA by contacting ammonia with ethylene oxide in aqueous medium, a stage (ii) of separation of a crude TEA from the aqueous medium and a stage (iii) of purification of the TEA by distillation. The process in addition comprises contacting the crude or purified TEA with an activated carbon free of one or more metals chosen from Re, Ru, Rh, Pd, Os, Ir, Pt and Ag, after the separation stage (ii), or during and after the purification stage (iii). The advantage of the claimed invention is to provide an ethanolamine which has an improved colour quality far more resistant over time, and which is obtained in the absence of any additive or metal catalyst known to contaminate the ethanolamine.
- -
-
Page/Page column 10-11
(2008/06/13)
-
- Process for producing high purity trialkanolamine
-
A process for producing a high purity trialkanolamine excelling in hue and having an APHA of not more than 40, characterizing by including producing a mixed alkanolamine by the reaction of an alkylene oxide with ammonia; removing low-boiling substances from the mixed alkanolamine; removing high-boiling substances by subjecting the product deprived of the low-boiling substance to vacuum distillation, and redistilling the distillate obtained by the vacuum distillation.
- -
-
-
- Cyclic organo-oxide storage vent scrubbing
-
A method for processing at least one cyclic organo-oxide using a closed loop scrubber/holding tank system that contains at least one amine, and circulating the amine through the closed loop while admitting the cyclic organo-oxide to the closed loop.
- -
-
Page column 6
(2008/06/13)
-
- Hair growth stimulant
-
The present invention provides a hair growth agent and a hair fostering shampoo that have N-methyltaurine as an essential ingredient, and have hair growth period extending effects, and moreover are capable of giving hair fitness and body and giving hair a feeling of volume. Moreover, the present invention also provides a cell activating agent and a hair fitness/body improving agent that are blended into hair cosmetics.
- -
-
-
- Process for the continuous preparation of hydroxyalkylamides
-
Process for the continuous preparation of hydroxyalkylamides Process for the continuous preparation of hydroxyalkylamides from carboxylic esters and alkanolamines, wherein the reaction of the starting materials is carried out in an extruder or intensive mixer by intensive mixing and brief reaction with supply of heat and simultaneous removal of the alcohol formed and the final product is then isolated.
- -
-
-
- Method of treating a patient having precancerous lesions with phenyl cycloamino pyrimidinone derivatives
-
Derivatives of Phenyl Cycloamino Pyrimidinone are useful for the treatment of patients having precancerous lesions. These compounds are also useful to inhibit growth of neoplastic cells.
- -
-
-
- Fluorinated compounds as oxygen transport agents
-
New compounds are described typically having the formula CH3 C(CH2 R)3 or ZCH2 C(CH2 R)3 where R is a fluorohydrocarbon or perfluorocarbon group, preferably containing 4-16 carbon atoms and more F atoms that H atoms. Z is a hydrophilic group which may make the compound self-emulsifiable. The compounds are useful as oxygen transport agents in vivo, for which purpose aqueous emulsions are used, as a blood substitute.
- -
-
-
- Process for the preparation of polyoxyalkylated amines
-
A process for the preparation of polyoxyalkylated compounds comprising at least one primary or secondary amine function is provided comprising reacting at least one amino-alcoholate (B) produced from an amino-alcohol (A) including at least one OH group and at least one primary or secondary amine function, by replacing a fraction or all the OH groups by OM groups, M being selected from sodium, potassium, rubidium and cesium, with an oxirane, a mixture of oxiranes or a sequence of oxiranes, in an aprotic and anhydrous solvent, in an anhydrous atmosphere and at a temperature of between about 0° C. and 200° C.
- -
-
-
- PYRIDOPYRIMIDINONE ANTIANGINAL AGENTS
-
Compounds of the formula and pharmaceutically acceptable salts thereof, wherein R 1 is H, C 1 -C 4 alkyl CN or CONR 4 R 5 ; R 2 is C 2 -C 4 alkyl; R 3 is SO 2 NR 6 R 7, NO 2, NH 2, NHCOR 8 NHSO 2 R 8 or N(SO 2 R 8) 2 ; R 4 and R 5 are each independently selected from H and C 1 -C 4 alkyl; R 6 and R 7 are each independently selected from H and C 1 -C 4 alkyl optionally substituted with CO 2 R 9, OH, pyridyl 5-isoxazolin-3-onyl, morpholino or 1-imidazolidin-2-onyl; or together with the nitrogen atom to which they are attached form a pyrrolidino, piperidino, morpholino, 1-pyrazolyl or 4-(NR 10)-1-piperazinyl group wherein any of said groups may optionally be substituted with one or two substituents selected from C 1 -C 4 alkyl, CO 2 R 9, NH 2 and OH; R 8 is C 1 -C 4 alkyl or pyridyl; R 9 is H or C 1 -C 4 alkyl; and R 10 is H, C 1 -C 4 alkyl or (hydroxy) C 2 -C 3 alkyl; are selected cGMP PDE inhibitors useful in the treatment of, inter alia, cardiovascular disorders such as angina, hypertension, heart failure and atherosclerosis
- -
-
-
- Disazo dyestuffs
-
Disazo dyestuffs have been found which, in the form of the free acid, correspond to the formula (I) STR1 represents H or an optionally substituted aliphatic or aromatic radical and R1 to R6 and A have the meaning given in the description, which are outstandingly suitable for inkjet printing.
- -
-
-
- Heterocyclic hydrazines and hydrazones
-
N-carbamoyl-2-carboxyaryl-heterocyclic and hydrazinecarboximidamide-hydrazone derivatives, intermediates and processes for their preparation, agricultural compositions containing them and their use as agricultural chemicals, in particular herbicides.
- -
-
-
- Preparation of N-alkylpiperazines
-
Disclosed is a one-step method for preparing N-alkylpiperazines which eliminates the initial preparation and isolation of piperazine which comprises reacting a carbonyl compound and an amine in the presence of hydrogen over a metallic hydrogenation-dehydrogenation catalyst from Group VIII of the Periodic Table such as, for example, nickel, copper, cobalt, chromium, palladium, platinum or ruthenium, alone or in combination with other Group VIII metals or transition metals selected from the group consisting of manganese, iron, zinc, copper and chromium.
- -
-
-
- Phthalocyanine reactive dyestuffs
-
Phthalocyanine reactive dyestuffs which, in the form of the free acid, have the formula (1) STR1 in which the variable radicals have the meaning given in the description, are prepared by condensation of the corresponding amines with cyanuric fluoride or cyanuric chloride in any desired order. The reactive dyestuffs according to the invention exhibit good wet and light fastness properties and are used for the dyeing and printing of cotton.
- -
-
-
- Triphendioxazine dyestuffs
-
The novel triphendioxazine dyestuffs of the formula STR1 in which the substituents R, R', T1, T2, X, Y and n have the meanings given in the description are highly suitable for the dyeing and printing of cellulose-containing or amido-containing material.
- -
-
-
- Polyunsaturated fatty acid derivatives, pharmaceutical compositions containing the same, method for the preparation thereof, and their use as medicament
-
The compounds of the Formula (I) STR1 wherein R1 is a C18-24 alkenyl containing at least two double bonds, or --(CH2)n --CH(NH2)m --COOH X is 0, NH or C1-4 alkyl-N, Y is CONH2, COOH or COOMe, wherein Me is hydrogen metal, and R2 is a side chain of a any amino acid except L-GLU or L-ASP at α-position or a group of Formula wherein k is zero or an integer of 1, n is zero or an integer of 1 to 3, m is zero or an integer of 1 to 4, A is hydroxyl or one A is hydroxyl and the other A is hydrogen. M is H or R1 --CO and X and R1 are as defined above and their salts having tyrosine kinase inhibitor activity can be used as antitumor agents.
- -
-
-
- Asymmetric dioxazine compounds having a triazinyl bridging group and a method of production and use thereof
-
An asymmetric dioxazine compound of the following formula in the free acid form, STR1 wherein R is hydrogen, halogen, sulfo or alkoxy, R1, R2 and R3 are each hydrogen or alkyl, X1 and X2 are each hydrogen, halogen, alkyl, alkoxy or phenoxy, Y is alkylene, phenylene or naphthylene, Z is --SO2 CH=CH2, --SO2 CH2 CH2 OSO3 H or the like, V is hydrogen, alkyl, acyl or substituted triazinyl, and Q is halogen, alkoxy, amino or a group similar to that of STR2 provided that R is hydrogen, and Q is amino or a group similar to that of STR3 when V is substituted triazinyl, which is useful for dyeing or printing fiber materials to give dyed or printed products of a brilliant blue color superior in fastness properties, particularly those such as chlorine fastness with superior build-up property.
- -
-
-
- Alkoxy-type derivative compounds and process for preparing alkoxy-type derivatives of trivalent Group 3b metals
-
Alkoxy-type derivative compounds are a process for preparing alkoxy-type derivatives of trivalent Group 3b metals, e.g., cerium (III), such as alkoxides, siloxides or alkanolatoamines from an anhydrous complex of trivalent Group 3b metals, e.g. cerium ammonium nitrate complex, in the presence of an alcohol, silanol or alkanolamine and a base or by employing the complex and alkali salts of the alcohol, silanol, or alkanolamine.
- -
-
-
- Reaction products of boric acid and alkanoletheramines and their use as corrosion inhibitors
-
This invention is directed to a product formed by reacting under condensation conditions, in effective molar ratios, an orthoboric acid and an alkanoletheramine having the formula wherein R is hydrogen or lower alkyl, R1 is lower alkylene and n is 1-5.
- -
-
-
- Organoboranes. LI. Convenient procedures for the recovery of pinanediol in asymmetric synthesis via one-carbon homologation of boronic esters
-
Matteson's asymmetric synthesis via a one-carbon homologation of the pinanediol boronic esters with (dichloromethyl)litihium at -100 deg C results in the insertion of a chloromethyl group into the carbon-carbon bond with > 99percent diastereoselectivity.This procedure makes possible the asymmetric synthesis of the chiral moiety, RR'CH*B(OR'')2, providing an alternative route to chiral hydroboration for these valuable chiral intermediates.Unfortunately, this method suffers from the remarkable difficulty encountered in the recovery of the pinanediol chiral auxiliary, making this asymmetric synthesis impractical.Fortunately, a systematic study of the problem has uncovered convenient procedures for the recovery of pinanediol from pianendiol boronate esters
- Brown, Herbert C.,Rangaishenvi, Milind V.
-
-
- Aminopolyols and polyurethanes prepared therefrom
-
Novel aminopolyols are the products of the reaction of an N-substituted ethanolamine with a terminal epoxy-containing compound. The epoxy-containing compounds may be: I. terminal mono-epoxy-containing aliphatic hydrocarbons, II. mono-glycidyl ethers of aliphatic hydrocarbons, III. mono-glycidyl esters of fatty acids, and IV. di-glycidyl ethers of bisphenols. The novel aminopolyols are useful in the preparation of novel polyurethanes by reaction with polyisocyanates.
- -
-
-
- Fiber-reactive disazo brown dye having vinylsulfone-type reactive group
-
A compound, or a salt thereof, represented by the following formula, STR1 wherein A is a substituted or unsubstituted phenylene or naphthylene group, B is STR2 in which R3 is a hydrogen atom or a lower alkyl, lower alkoxy, acylamino or ureido group, and R4 is a hydrogen atom or a lower alkyl or lower alkoxy group, R1 and R3 are independently a hydrogen atom or a substituted or unsubstituted lower alkyl group, X is a substituted or unsubstituted amino, lower alkoxy, substituted phenoxy or sulfo group, Y is --SO2 CH=CH2 or --SO2 CH2 CH2 Z, in which Z is a group capable of being split by the action of an alkali, and m is 2 or 3, which is useful for dyeing hydroxyl group- or amide group-containing fiber materials to give dyed products of a brown color having excellent fastness properties with good build-up property.
- -
-
-
- Catalysts for alkoxylation reactions
-
Catalysts producing a sharply peaked alkoxylation distribution during the alkoxylation of organic materials comprise mixtures of BF3 and metal alkyls or metal alkoxides, SiF4 and metal alkyls or metal alkoxides, or mixtures of these catalysts.
- -
-
-
