70240-75-4Relevant academic research and scientific papers
Preparation method of 9, 10-dihydroxy stearate
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Paragraph 0035-0036, (2021/03/31)
The invention discloses a preparation method of 9, 10-dihydroxy stearate, which comprises the following steps: uniformly mixing oleate and a catalyst, dropwisely adding a hydrogen peroxide solution, and reacting at 20-80 DEG C for 0.5-24 hours; and after the reaction is finished, removing a water layer, washing an oil layer with water, and drying to obtain the target product 9, 10-dihydroxy stearate. The catalyst is one or a mixture of two of phosphotungstic acid and supported phosphotungstic acid. According to the preparation method of the 9, 10-dihydroxy stearate, strong acids such as formicacid and sulfuric acid are not added, alkali is not required to be added for neutralization after the reaction is finished, and the 9, 10-dihydroxy stearate has the advantages of small corrosion to equipment, small environmental pollution, good selectivity, high activity and the like, meets the green and environment-friendly requirements and has an industrial application prospect.
Homogeneous and heterogeneous catalytic (dehydrogenative) oxidation of oleochemical 1,2-diols to α-hydroxyketones
Vu, Nam Duc,Guicheret, Boris,Duguet, Nicolas,Métay, Estelle,Lemaire, Marc
supporting information, p. 3390 - 3399 (2017/07/28)
Herein, the preparation of methyl oleate α-hydroxyketone from the corresponding 1,2-diol was investigated using both homogeneous and heterogeneous systems. Homogeneous conditions using a Pd(OAc)2/neocuproine complex were first developed using oxygen as a sole oxidant under mild conditions (MeOH, 50 °C). Under these conditions, the conversion of diol reached 95%, and α-hydroxyketone was obtained with 97% selectivity. The access to α-hydroxyketone has also been studied by dehydrogenation using a range of heterogeneous catalysts under solvent-free conditions at high temperatures (160-180 °C). Dehydrogenation using activated Ru/C under vacuum provided α-hydroxyketone with 93% conversion and 82% GC yield. The optimized conditions were applied to a range of oleochemical diols, including a vegetable oil derivative, to obtain the corresponding α-hydroxyketones with up to 74% isolated yields.
New dicarboxylic acid type compd.
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Paragraph 0031, (2018/10/24)
PROBLEM TO BE SOLVED: To provide a new dicarboxylic acid type compound having a biodegrading property and safety, and showing an excellent surface activity. SOLUTION: This new dicarboxylic acid type compound is expressed by general formula (1) [wherein, CnH2n+1is linear or branched alkyl; (n) is an integer of 1 to 22; R1is 1-22C alkylene; R2is 1-22C alkyl, provided that R1and R2are each selected so that the -R1-CH-CH-R2part shows a 9-25C hydrocarbon structure; and X shows a hydrogen ion, alkali metal ion, group 2 element ion, transition element ion, group 12 element ion, aluminum ion, indium ion, tin ion, lead ion or ammonium ion]. COPYRIGHT: (C)2011,JPOandINPIT
