Selective hydrogenation
AssigneeLever Brothers Company
InventorJan Kuiper
Life of this patent
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Abstract
The selectivity of the hydrogenation of compounds containing more than one double carbon-carbon bond in the presence of a metallic catalyst of group VIII of the periodic system is improved and trans isomer formation is reduced by treating the catalyst with a basic compound before addition of the catalyst to the substrate or in situ. The basic compound is a quaternary ammonium hydroxide, an alkali or alkaline earth hydroxide or ammonium hydroxide, a salt with a weak acid of such a hydroxide or an alcoholate of the cations of these hydroxides.
Claims12
Process for the selective hydrogenation of triglyceride oils containing fatty acid residues having more than one double bond between carbon atoms comprising hydrogenating said oils in the presence of a catalytically active metal of group VIII of the periodic system of the elements, said catalytically active metal being optionally promoted by a metal from another group of said system, and in the presence of a basic compound with the formula AX, in which A is selected from the group consisting of R.sub.1 R.sub.2 R.sub.3 R.sub.4 N.sup.+ ;
- R.sub.1,R.sub.2,R.sub.3 and R.sub.4 each being an alkyl, cycloalkyl, aryl or aralkyl group with 1 to 20 carbon atoms which may be substituted;
- the elements of group I or II of the periodic system, and ammonium, and X is selected from the group consisting of hydroxyl, an anion of a weak acid and RO--, in which R is an alkyl group.
Dependencies are inferred from the claim text.