Abstract

The invention relates to a method for the metathesis of olefin(s). The method according to the invention comprises bringing at least one fatty acid ester or a fatty acid into contact with a metathesis catalyst, said fatty acid ester or fatty acid comprising at least one unsaturation, wherein the ester or the fatty acid is treated with a sorbent before being brought into contact with the metathesis catalyst, the sorbent being maintained in the reactive medium while the ester or the fatty acid is brought into contact with the metathesis catalyst.

IPC Classes  ?

• C07C 67/347 - Preparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by isomerisationPreparation of carboxylic acid esters by modifying the acid moiety of the ester, such modification not being an introduction of an ester group by change of size of the carbon skeleton by increase in the number of carbon atoms by addition to unsaturated carbon-to-carbon bonds
• C07C 67/475 - Preparation of carboxylic acid esters by splitting of carbon-to-carbon bonds and redistribution, e.g. disproportionation or migration of groups between different molecules
• C07C 57/03 - Monocarboxylic acids
• C07C 57/12 - Straight chain carboxylic acids containing eighteen carbon atoms
• C07C 57/13 - Dicarboxylic acids
• C07C 69/58 - Esters of straight chain acids with eighteen carbon atoms in the acid moiety
• C07C 69/593 - Dicarboxylic acid esters having only one carbon-to-carbon double bond
• C07C 69/533 - Monocarboxylic acid esters having only one carbon-to-carbon double bond
• C07C 69/602 - Dicarboxylic acid esters having at least two carbon-to-carbon double bonds

Abstract

The present invention concerns a method for the metathesis of an olefin or olefins and, more specifically, of one or more fatty acid esters comprising at least one unsaturation. The method according to the invention comprises bringing at least one fatty acid ester into contact with a metathesis catalyst, in which the fatty acid ester is treated by a sorbent before being brought into contact with the metathesis catalyst, the sorbent having a pH lower than 6.0 and comprising at least 65% by weight of SiO2, the weight percentage being given relative to the total weight of sorbent.

IPC Classes  ?

• C07C 67/475 - Preparation of carboxylic acid esters by splitting of carbon-to-carbon bonds and redistribution, e.g. disproportionation or migration of groups between different molecules
• C07C 69/533 - Monocarboxylic acid esters having only one carbon-to-carbon double bond
• C07C 69/58 - Esters of straight chain acids with eighteen carbon atoms in the acid moiety
• C07C 69/593 - Dicarboxylic acid esters having only one carbon-to-carbon double bond
• C07C 69/602 - Dicarboxylic acid esters having at least two carbon-to-carbon double bonds