Premium
Methyl glucoside fatty acid diesters
Author(s) -
Gibbons J. P.,
Swanson C. J.
Publication year - 1959
Publication title -
journal of the american oil chemists' society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.512
H-Index - 117
eISSN - 1558-9331
pISSN - 0003-021X
DOI - 10.1007/bf02641149
Subject(s) - glucoside , chemistry , catalysis , fatty acid , organic chemistry , fatty acid methyl ester , molar ratio , surface tension , sodium , medicine , physics , alternative medicine , pathology , quantum mechanics , biodiesel
Summary and Conclusion Procedures are described for the preparation of methyl glucoside diesters by direct esterification, using a ratio of one mole of methyl glucoside with two moles of fatty acids. Rate studies indicated that lead or stannous soaps are more effective catalysts than the sodium soaps for speeding up tis esterification. With equal molar quantities of methyl glucoside and fatty acid, the lead and the sodium soap catalysts give products containing predominantly diester and half the methyl glucoside remaining unreacted. Under the same conditions stannous soap catalysis gives high yields of monoesters containing only very small percentages of unreacted methyl glucoside. From the standpoint of speed of reaction, color of the final produets, ease of removal of catalyst from the ester products, and catalyst cost, litharge is the preferred cytalyst for the preparation of methyl glucoside diesters. Properties of various methyl glucoside fatty acid diesters, prepared on a laboratory scale, are given. Du Noü;y surface‐tension measurements indicate that small quantities of the methyl glucoside dilaurate, dicaprate, or dioleate are quite effective in lowering the surface tension of water.