Process for preparing biodegradable lubricant base oils
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United States of America Patent
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Nov 3, 2015
Grant Date -
May 28, 2015
app pub date -
May 22, 2013
filing date -
May 22, 2012
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Abstract
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.
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