Process for the selective hydrogenation of triglyceride oils with a metallic catalyst in the presence of a diamine.

摘要

Unsaturated fatty acid derivatives which, besides fatty acids with two double bonds, contain fatty acids with more than two double bonds, are hydrogenated in the presence of a palladium, platinum or rhodium catalyst which has been treated with ethylenediamine or a homologue and/or a derivative thereof and at a temperature of -20 to 100°C. The hydrogenation progresses very selectively while very little isomerisation to trans-fatty acids occurs.

For example, in the hydrogenation of soya bean oil to a linolenic acid content of 2%, the linoleic acid content only decreasesto 45-52%. Under identical conditions an untreated catalyst leads to a linoleic acid content of about 35%.