35158-25-9Relevant articles and documents
Organic compound as well as preparation method and application thereof
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Paragraph 0187; 0189; 0203; 0205; 0224; 0226; 0245; 0248, (2019/10/04)
The invention relates to an organic compound as well as a preparation method and application thereof. The organic compound has a structural formula I shown in the specification, in the formula, R4 is H; R1, R2 and R3 are alkyl or H of which the carbon number is an integer; the total carbon number of R1, R2, R3 and R4 is 0-3; R5 and R6 are of an identical structure and are both saturated alkyl with 1-3 carbon atoms; A is a polyoxy alkenyl ether group, a sulfation polyoxy alkenyl ether group, an aliphatic, alicyclic or aromatic group which forms an ester group with adjacent oxygen atoms, or an aliphatic, alicyclic or aromatic group which comprises other ester groups. Due to a carbon chain structure similar to Guerbet alcohol and an alcoholic hydroxyl derivative structure at a para-site in the organic compound, the organic compound has excellent low-temperature properties and good degradability in a surfactant, ester type lubricating oil or a plasticizer.
Method for performing aldol condensation reaction in micro-channel reactor
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Paragraph 0086; 0087; 0088; 0089; 0090; 0091; 0092-0096, (2018/07/15)
The invention relates to a method for performing an aldol condensation reaction in a micro-channel reactor. The aldol condensation reaction is performed in the micro-channel reactor under the action of a catalyst at 60 to 170 DEG C and 0 to 5 MPa in the situation that alpha-H aldehyde ketone and other aldoketones in molecules are in the molar ratio of 0.8-1.2:1. According to the aldol condensationreaction involved in a process provided by the invention, the reaction time is shortened by thousands of times; the raw material conversion rate and the product selectivity are improved by 15 percentat least. The process provided by the invention can realize instantaneous uniform mixing; the equivalence ratio of materials in a reaction process is reduced; the using amount of a catalyst in a reaction process is reduced; Cannizzaro side reactions and polymerization reactions are reduced. The process provided by the invention also reduces the use of some additional solvents so as to reduce theproduction cost; the process provided by the invention also improves the safety of a reaction process, so that the types of reactions are safer and more environment-friendly; meanwhile, the micro-channel reactor used by the process provided by the invention is small in occupied area and high in capacity, so that the production efficiency and the production capacity are greatly improved.
A 2-isopropyl-5-methyl-2-hexenal method for the preparation of
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Paragraph 0035; 0039; 0040; 0041, (2016/10/07)
The invention provides a method for preparing 2-isopropyl-5-methyl-2-hexenal by using 3-methylbutyraldehyde as a raw material and solid alkali of alumina supported alkali metal hydroxide or alkali carbonate as a catalyst. The method provided by the invention has the advantages that an alkaline aqueous solution is avoided, thus treatment and discharge of alkaline wastewater are reduced; the prepared solid alkali catalyst has higher activity, can be used for preparing the 2-isopropyl-5-methyl-2-hexenal with higher yield and makes separation and purification of the product simpler.
A solid alkali catalytic preparation of 2-isopropyl-5-methyl-2-hexenal, the method
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Paragraph 0037; 0044-0046, (2017/03/24)
The invention provides a method for preparing 2-isopropyl-5-methyl-2-hexenal by using 3-methylbutyraldehyde as a raw material and solid alkali of alkaline earth metal oxide supported alkali metal hydroxide or alkali carbonate as a catalyst. The method provided by the invention has the advantages that an alkaline aqueous solution is avoided, thus treatment and discharge of alkaline wastewater are reduced; the prepared solid alkali catalyst has higher activity, can be used for preparing the 2-isopropyl-5-methyl-2-hexenal with higher yield and makes separation and purification of the product simpler.
P-Toluene sulfonic acid (PTSA)-MCM-41 as a green, efficient and reusable heterogeneous catalyst for the synthesis of jasminaldehyde under solvent-free condition
Ganga, Venkata Subba Rao,Abdi, Sayed H.R.,Kureshy, Rukhsana I.,Khan, Noor-Ul H.,Bajaj, Hari C.
, p. 264 - 271 (2016/05/19)
This paper reports the synthesis of p-Toluene sulfonic acid (PTSA)-MCM-41 by impregnation method and its characterization XRD, FT-IR, TGA, N2 adsorption-desorption isotherms, SEM, and TEM. The impregnated catalysts were used to catalyse cross-aldol condensation of active methylene bearing aliphatic aldehydes with aromatic aldehydes under solvent and metal-free condition particularly in the synthesis perfumery chemical-jasminaldehyde and related compounds. The as synthesized catalyst PTSA-MCM-41 has displayed high efficiency (selectivity up to 91%) in catalyzing cross-aldol condensation reaction and was reusable (5 cycles) with no apparent loss in activity. The catalytic performance of PTSA-MCM-41 was compared with other catalysts viz., ZnO, proline, proline-LDH, PTSA, PTSA-zirconia and PTSA-zeolite where PTSA-MCM-41 showed better performance particularly in synthesis of jasminaldehyde.
Liquid-phase isomerization of saturated and unsaturated epoxides
Mel'nik,Khvatova,Moskvichev,Srednev,Egorova
, p. 167 - 169 (2007/10/03)
The liquid-phase isomerization of a variety of epoxides was studied using a complex catalyst system based on magnesium bromide and dimethylformamide. The data obtained elucidate the mechanism of the liquid-phase isomerization and show the range of oxygen-containing compounds which can be prepared through this reaction.
Process for catalytic aldol condensations by means of a multiphase reaction
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Example 11, (2008/06/13)
The invention relates to a process for the catalytic aldol condensation of aldehydes by means of a multiphase reaction in a tube reactor, wherein the catalyst is present in the continuous phase and at least one aldehyde is present in a dispersed phase and the loading factor B of the tube reactor is equal to or greater than 0.8; the aldol condensation products obtained in this way can be used for preparing alcohols or carboxylic acids.
Aldol Reaction and Robinson-Type Annelation Catalyzed by Lanthanoid Triisopropoxides
Okano, Tamon,Satou, Yoshikazu,Tamura, Motoshi,Kiji, Jitsuo
, p. 1879 - 1886 (2007/10/03)
Lanthanoid triisopropoxides are active catalysts for aldol reactions.Aldehydes give the corresponding β-hydroxyaldehydes at low temperatures in good yields, whereas ketones are less reactive, but form condensation products at high temperatures.Exceptionally, γ- or δ-diketones easily undergo condensation to give five- and six-membered unsaturated ketones in high yields.The lanthanoid propoxides, catalyzing the Michael addition of ketones to α,β-unsaturated ketones, which give δ-diketones, are also good catalysts for the Robinson-type annelation.In these reactions, the catalytic activity of the lanthanum propoxide is higher than those of the heavy lanthanoid propoxides, and is almost comparable to that of sodium isopropoxide.Since aluminum triisopropoxide shows poor activity, the lanthanoid propoxides are considerably basic for trivalent metal alkoxides.
