4813-60-9Relevant articles and documents
A method for preparing fatty acid polyhydric alcohol ester
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Paragraph 0020-0022, (2017/03/08)
The present invention relates to a fatty acid polyol ester preparation method, which comprises: adopting metatitanic acid as a raw material, carrying out drying crushing on the metatitanic acid, immersing the treated metatitanic acid in a sulfuric acid solution, filtering, drying, crushing, and calcining to prepare a titanium source solid acid catalyst; and adopting a polyol and a fatty acid as raw materials, adding the titanium source solid acid catalyst, carrying out an esterification reaction at a certain temperature under the protection of nitrogen gas with water, and carrying out a separation refinement treatment on the obtained fatty acid polyol ester crude product to obtain a fatty acid polyol ester product. According to the present invention, the industrial metatitanic acid is adopted as the titanium source to prepare the solid acid catalyst so as to avoid problems of corrosion on equipment, complex product post-treatment, difficult catalyst separation, easy pollution generation and the like of use of sulfuric acid and other liquid acid catalysts, and characteristics of low raw material preparation cost, simple preparation process, effectively reduced production cost, high catalyst catalysis efficiency, and efficient fatty acid and polyol esterification reaction performing within a short time are provided compared with the solid super acid.
PROCESS FOR PREPARING BIODEGRADABLE LUBRICANT BASE OILS
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Paragraph 0080; 0091, (2015/06/03)
The invention discloses an improved process for preparing fatty acid esters with 100 mol % selectivity suitable as biodegradable lubricant base oils, comprising contacting a fatty compound with an alcohol in presence of a solid, phosphonate catalyst having molecular formula: M(X)2-nYn.mH2O where X refers to phenyl phosphonate, Y refers to HPO42? or HPO32?, M refers to a metal or metalloid ion preferably taken from the group consisting of Zr, Zn, Cd, Al, Sn, La and Ce, the value of n varies from 0.2 to 1.8 and the value of m varies from 0 to 5, wherein the fatty compound is a fatty acid or fatty acid methyl or ethyl ester or vegetable oil or animal fat or their mixture thereof and alcohol is a monohydric alcohol with 6 to 22 carbon atoms or a polyol with at least two hydroxyl groups.
Immobilizing heteropolyacids on zirconia-modified silica as catalysts for oleochemistry transesterification and esterification reactions
Kuzminska, Maryna,Kovalchuk, Tetyana V.,Backov, Rénal,Gaigneaux, Eric M.
, p. 1 - 8 (2015/09/28)
A new method of chemical immobilization of Keggin heteropolyacids (HPAs) was suggested. H3PW12O40, H4SiW12O40, and H3PMo12O40 were immobilized on the silica which was previously grafted with zirconium butoxide. The immobilization method promoted strong interaction HPA-support and yielded 25 wt.% of well-dispersed HPAs, so increasing the density of acid sites. The catalysts were active in the reaction of transesterification of methyl stearate with n-butanol and esterification of oleic acid with trimethylolpropane. We demonstrate that, contrary to the immobilized H3PMo12O40, the H3PW12O40 and H4SiW12O40-based catalysts are stable toward leaching in a non-polar oleic acid medium. A discussion on circumventing the leaching in non-polar versus polar media is proposed in terms of interaction strength HPA-support. The stronger interaction (i.e., better resistance for leaching) between the support and H3PW12O40 (or H4SiW12O40) is referred to the lower difference of electronegativity between Zr and W and the lower polarizability of the bonds Zr-O-W compared to Zr-O-Mo.
