- Synthesis of 1,2-propanediamine via reductive amination of isopropanolamine over Raney Ni under the promotion of K2CO3
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Catalytic amination of isopropanolamine and ammonia to 1,2-propanediamine over Raney Ni with potassium carbonate as the additive was reported. Characterization of N2 adsorption–desorption and XRD were performed to reveal the textural and structural properties of the catalysts. With the additive of potassium carbonate, the selectivity of 1,2-propanediamine was improved, while the side generation of 2,5-dimethylpiperazine was suppressed. The catalytic reaction parameters were optimized and the yield of 1,2-propanediamine reached 80% under the optimized reaction condition.
- Yu, Qin-Wei,Li, Ya-Ni,Zhang, Qian,Wang, Wei-Qiang,Mei, Su-Ning,Hui, Feng,Shi, Jian,Zhao, Feng-Wei,Yang, Jian-Ming,Lu, Jian
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p. 2019 - 2026
(2019/09/09)
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- Selective amination of 1,2-propanediol over Co/La3O4 catalyst prepared by liquid-phase reduction
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The catalytic coupling of alcohol and ammonia is an environmentally friendly process. Cobalt-based catalysts, modified by supports (including CeO2, Fe3O4, Nb2O5, La3O4 and Al2O3), and prepared by the liquid-phase reduction, were used for the amination of 1,2-propanediol. The screened nano-Co/La3O4 catalyst exhibited an excellent catalytic performance of 68% conversion and 89% selectivity toward 2-amino-1-propanol under optimal conditions. The characterizations of the catalyst was performed by XRD, XPS, BET, TEM, TG, and CO2-TPD, revealing a relatively large specific surface area, strongly alkaline sites and a Co-La-O transition phase, which were responsible for the selective catalysis of 1,2-propanediol. The efficient construction of cobalt-based catalysts on the basis of the active species is key to improving the efficiency of the reaction process.
- Yue, Chuan-Jun,Di, Kai,Gu, Li-Ping,Zhang, Zhen-Wei,Ding, Lin-Lin
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- Method of synthesizing 2-methyltriethylenediamine with 2-methylpiperazine as raw material
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The invention belongs to the field of fine chemical engineering and relates to a method of synthesizing 2-methyltriethylenediamine with 2-methylpiperazine as raw material. The method is to solve the problems of expensive and complicated raw materials and complex synthesis steps. The method can catalytically synthesize the 2-methyltriethylenediamine in one step only with the 2-methylpiperazine as araw material by means of TiO2/Pentasil zeolite as a catalyst. The method employs simple raw material, is simple and has high application value.
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Paragraph 0017-0028
(2019/01/06)
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- A phase transfer catalysis process for preparing 1, 2 - propylene diamine method
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The invention introduces preparation of 1,2-propane diamine, and mainly emphasizes an application of a phase-transfer catalyst to reactions. A major reaction process comprises the following steps: (1) adding propylene dichloride, ammonia water, a catalyst and the phase-transfer catalyst into a reaction kettle; (2) putting the reaction kettle into which raw materials are added into a homogeneous phase reactor; (3) reacting at 140-170 DEG C and 25 Hz, evaporating unreacted ammonia gas under the normal pressure after the reaction is finished, and distilling to obtain an aqueous solution of propane diamine. The method disclosed by the invention has the advantages that the propylene dichloride being a byproduct produced in the production of epoxy chloropropane is taken as a raw material, i.e.,, waste is utilized, and thus the production cost is reduced; the phase-transfer catalyst is added in a reaction process, so that the reaction yield is greatly increased; meanwhile, the method is simple, is easy to operate, and is easy for realizing industrial production.
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Paragraph 0017; 0030; 0031
(2017/08/25)
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- The invention relates to a propylene glycol and liquid ammonia as raw materials for preparing propylene diamine method and apparatus thereof
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The invention relates to a method for preparing propane diamine by taking propylene glycol and liquid ammonia as raw materials. Propylene glycol and liquid ammonia are mixed in a certain ratio and are pumped into a reactor by virtue of a pump, and reaction is carried out in presence of a catalyst and hydrogen. The method for preparing the propane diamine by taking the propylene glycol and liquid ammonia as the raw materials has the advantages that a novel catalyst is adopted, catalytic performance is excellent, and long-time operation can be easily carried out; propylene glycol is subjected to hydroamination for producing a propane diamine product at lower reaction pressure, and reaction conditions are adjusted and changed, so that composition of the product can be flexibly adjusted and changed, selectivity of a target product is improved, a reaction process is simple, one-time investment of a production unit and production cost are reduced, a reaction product and a catalyst can be simply separated, and large-scale continuous industrial production can be easily realized.
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Paragraph 0052-0053; 0089
(2017/08/31)
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- Production of Primary Amines by Reductive Amination of Biomass-Derived Aldehydes/Ketones
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Transformation of biomass into valuable nitrogen-containing compounds is highly desired, yet limited success has been achieved. Here we report an efficient catalyst system, partially reduced Ru/ZrO2, which could catalyze the reductive amination of a variety of biomass-derived aldehydes/ketones in aqueous ammonia. With this approach, a spectrum of renewable primary amines was produced in good to excellent yields. Moreover, we have demonstrated a two-step approach for production of ethanolamine, a large-market nitrogen-containing chemical, from lignocellulose in an overall yield of 10 %. Extensive characterizations showed that Ru/ZrO2-containing multivalence Ru association species worked as a bifunctional catalyst, with RuO2 as acidic promoter to facilitate the activation of carbonyl groups and Ru as active sites for the subsequent imine hydrogenation.
- Liang, Guanfeng,Wang, Aiqin,Li, Lin,Xu, Gang,Yan, Ning,Zhang, Tao
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supporting information
p. 3050 - 3054
(2017/03/14)
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- METHOD FOR PRODUCING 1,2-PROPYLENEDIAMINE
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According to an aspect of the present invention, a manufacturing method of 1,2-propylenediamine adopts a catalyst-free method, and can save costs for a catalyst. Also, the manufacturing method of 1,2-propylene diamine can utilize conventional manufacturing equipment, thereby providing 1,2-propylenediamine with remarkable cost efficiency. The manufacturing method of the present invention makes 1,2-dichloropropane react with an ammonia solution through a catalyst-free method.COPYRIGHT KIPO 2016
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Paragraph 0021; 0022
(2017/06/20)
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- A 1,2-propane diamine synthetic method
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The invention relates to a synthesis method of 1,2-propane diamine. The method comprises the steps of preparing 1,2-propane diamine via reaction between isopropanolamine and liquid ammonia in the presence of hydrogen, a catalyst, an assistant and a reaction solvent. Compared with the prior art, since the reaction solvent is added, and due to solvation of the solvent and the reaction material, the probability of the reaction product 1,2-propane diamine continuing to participate in reaction to generate a cyclamine product is reduced; at the same time, the alkali metal and alkaline-earth metal assistant is added into a reaction system, and the base strength of the reaction system is changed, so that dehydrogenation of the catalyst to the reaction material is inhibited; and the selectivity of the product 1,2-propane diamine is improved.
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Paragraph 0048; 0049
(2017/02/24)
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- FUNCTIONALIZED HIGHLY BRANCHED MELAMINE-POLYAMINE POLYMERS
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The present invention relates to a method for producing amphiphilic functionalized highly branched melamine-polyamine polymers by condensing melamine and optionally a melamine derivate having at least one different amine having at least two primary amino groups and optionally also with urea and/or at least one urea derivative and/or with at least one at least difunctional diisocyanate or polyisocyanate and/or at least one carbolic acid having at least two carboxyl groups or at least one derivative thereof, optionally quaternizing a portion of the amino groups of the polymer thereby obtained, reacting the polymer thus obtained with at least one compound capable of undergoing a condensation or addition reaction with amino groups, and optionally quaternizing at least part of the amino groups of the polymer obtained in the first step. The invention further relates to the amphiphilic functionalized highly branched melamine-polyamine polymers that can be obtained by the method according to the invention, and to the use thereof as surface active agents.
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- Polymethacrylic zinc porphyrin: A new approach to chiral recognition
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A methacrylic homopolymer bearing in the side-chain achiral zinc tetraarylporphyrin moieties, has been studied as macromolecular chromophoric host to determine the absolute configuration of α,ω-diamines. The polymeric material resulted able to bind the ch
- Angiolini, Luigi,Benelli, Tiziana,Giorgini, Loris
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experimental part
p. 204 - 209
(2012/01/15)
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- β-PNA: Peptide nucleic acid (PNA) with a chiral center at the β-position of the PNA backbone
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Peptide nucleic acid (PNA) monomers with a methyl group at the β-position have been synthesized. The modified monomers were incorporated into PNA oligomers using Fmoc chemistry for solid-phase synthesis. Thermal denaturation and circular dichroism (CD) studies have shown that PNA containing the S-form monomers was well suited to form a hybrid duplex with DNA, whose stability was comparable to that of unmodified PNA-DNA duplex, whereas PNA containing the R-form monomers was not.
- Sugiyama, Toru,Imamura, Yasutada,Demizu, Yosuke,Kurihara, Masaaki,Takano, Masashi,Kittaka, Atsushi
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supporting information; experimental part
p. 7317 - 7320
(2012/02/04)
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- METHOD FOR PRODUCING AMINES FROM GLYCERIN
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The present invention relates to a process for preparing amines by reacting glycerol with hydrogen and an aminating agent from the group of ammonia and primary and secondary amines in the presence of a catalyst at a temperature of from 100° C. to 400° C. and a pressure of from 0.01 to 40 MPa (from 0.1 to 400 bar). Preference is given to using glycerol based on renewable raw materials. The catalyst preferably comprises one metal or a plurality of metals or one or more oxygen compounds of the metals of groups 8 and/or 9 and/or 10 and/or 11 of the Periodic Table of the Elements. The invention further relates to the use of the reaction products as an additive in cement or concrete production and in other fields of use. This invention further provides the compounds 1,2,3-triaminopropane, 2-aminomethyl-6-methylpiperazine, 2,5-bis(aminomethyl)piperazine and 2,6-bis(aminomethyl)piperazine.
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Page/Page column 12-13; 14
(2010/10/03)
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- METHOD FOR PRODUCING AMINES FROM SUGAR ALCOHOLS
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The present invention relates to a process for preparing amines by reacting sugar alcohols with hydrogen and an aminating agent selected from the group of ammonia and primary and secondary amines in the presence of a catalyst at a temperature of from 100° C. to 400° C. and a pressure of from 1 to 40 MPa (from 10 to 400 bar). The catalyst preferably comprises one metal or a plurality of metals or one or more oxygen compounds of the metals of groups 8 and/or 9 and/or 10 and/or 11 of the Periodic Table of the Elements. The sugar alcohol is preferably obtained by hydrogenating the corresponding sugars. The invention further relates to the use of the reaction products as an additive in cement or concrete production and in other fields of use.
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Page/Page column 10
(2010/12/29)
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- Valency platform molecules comprising carbamate linkages
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This invention pertains generally to valency molecules, such as valency platform molecules which act as scaffolds to which one or more molecules may be covalently tethered to form a conjugate. More particularly, the present invention pertains to valency platform molecules which comprise a carbamate linkage (i.e., —O—C(=O)—N). In one aspect, the present invention pertains to valency platforms comprising carbamate linkages, which molecules have the structure of any one of Formulae I, II, or III, shown in FIG. 1. In one aspect, the present invention pertains to valency platforms comprising carbamate linkages, which molecules have the structure of any one of Formulae IV, V, or VI, shown in FIG. 8. The present invention also pertains to methods of preparing such valency platform molecules, conjugates comprising such valency platform molecules, and methods of preparing such conjugates.
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- Decolorization of polyalkylene polyamines
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A process for decolorizing polyalkylene polyamines, which comprises contacting one or more polyalkylene polyamines having an average molecular weight of greater than about 200 and less than about 1000 with carbon at a temperature greater than or equal to about 100° C. and less than or equal to about 300° C. under conditions effective to reduce the color rating of the one or more polyalkylene polyamines.
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- Use of α-Bromo Oxime Ethers in the Synthesis of 1,2-Diamines
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Oxime ethers 1 react with ammonia and primary amines to give α-amino oxime ethers.The reaction of α-bromo oxime ethers with sodium azide affords α-azido oxime ethers.Hydrogenolysis of the azido compounds using 5percent palladium on calcium carbonate as catalyst yields the α-amino oxime ethers.The reaction of α-azido oxime ethers with lithium aluminum hydride gives 1,2-ethanediamine derivatives.The reaction of azido oxime ether 13 with LiAlH4, and subsequently the reaction of the resulting mixture of the diamines 14 and 15 with phosgene, preferably gives cis-4-pentyl-5-methyl-2-imidazolidone (16) indicating that the reduction of 13 proceeds in a stereoselective manner to furnish mainly the syn-1,2-ethanediamine 15. Key Words: Oxime ethers / α-Azido oxime ethers / α-Amino oxime ethers / 1,2-Ethanediamines
- Shatzmiller, Shimon,Bercovici, Sorin
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p. 1005 - 1010
(2007/10/02)
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- SYNTHESIS OF CHIRAL 1,2-DIAMINES
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(1'S,5R,S)-(1'-phenyleth-1'-yl)-5-iodomethyl-imidazolines 4a, b have been synthesised and easily resolved by silica gel chromatography.The correlation between the configuration and the 1H-NMR chemical shifts allows to assign the configuration at the C-5 of these intermediates.Each pure diastereomer has been converted to R(-)- and to S(+)-1,2-propyldiamine, respectively.
- Bruni, Elena,Cardillo, Giuliana,Orena, Mario,Sandri, Sergio,Tomasini, Claudia
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p. 1679 - 1682
(2007/10/02)
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- Triazinyl reactive dyestuffs in which triazinyl group is further substituted with a beta-chloroethylsulfonyl- or vinylsulfonylbutyrylamino moiety
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Reactive dyes of the formula STR1 in which D is the radical of an organic dye of the monoazo, polyazo, metal complex azo, anthraquinone, phthalocyanine, formazan, azomethine, dioxazine, phenazine, stilbene, triphenylmethane, xanthene, thioxanthrone, nitroaryl, naphthoquinone, pyrenequinone or perylenetetracarbimide series, R is hydrogen or substituted or unsubstituted C1-4 -alkyl, X is a substituent which is detachable as an anion, B is a radical of the formula STR2 R1 and R2, independently of each other, are hydrogen or substituted or unsubstituted C1-4 -alkyl or phenyl, A is a substituted or unsubstituted aliphatic or aromatic bridge member, Y is a --CO--Z or --SO2 --Z radical, Z is an aliphatic, aromatic or heterocyclic reactive radical, and n is 1 or 2, are suitable for dyeing or printing cellulose-containing and nitrogen-containing materials and in high dyeing yield produce dyeings and prints having good fastness properties.
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- Process for preparing 1-oxa-3,8-diaza-4-oxo-spiro-[4,5]-decanes
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1-Oxa-3,8-diaza-4-oxo-spiro-[4,5]-decane compounds of the formula STR1 are new light stabilizers for protecting polymers from the damaging effect of UV radiation.
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- Process of preparing hexahydropyrimidines
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This invention relates to hexahydropyrimidines (HHP) of the formula STR1 where R' is a substituted group and R is hydrogen or a substituted group; the process of preparing and the uses therefor, particularly as deterioration inhibitors in hydrocarbon fuels.
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- Triazine derivatives
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The invention relates to polymers of triazine compounds containing piperidine groups which may serve as low volatile and migration-resistant light stabilizers for synthetic polymers. They have the structure STR1 and are obtained from cyanuric halides, diamines and polyalkylpiperidylamino compounds.
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