| 摘要 |
A method of manufacturing an ester composition comprising ethyl esters of linear monocarboxylic acids having 6 to 26 carbon atoms from a vegetable or an animal oil, neutral or acid, virgin or recycled, the method comprising: a stage 1 of reaction of vegetable or animal oil with methanol, in the presence of a heterogeneous catalyst comprising a combination of at least one metallic oxide and alumina or a combination of at least two metallic oxides and possibly alumina, and a stage 2 of reaction of the product from stage 1 with ethanol in the presence of a heterogeneous catalyst as defined for stage 1, so as to obtain from vegetable or animal oils, a mixture of fatty acid esters rich in fatty acid ethyl esters and a glycerin of high purity.
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