PROCÉDÉ DE PRÉPARATION D'UN MÉLANGE D'ACIDE 9-DÉCÉNOÏQUE ÉTHYL ET 1-DÉCÈNE DANS UNE RÉACTION D'ÉTHÉNOLYSE À PARTIR D'UNE MATIÈRE PREMIÈRE DE PURETÉ TECHNIQUE

摘要

The subject of the invention is a method for obtaining a mixture of ethyl 9-decenoate and 1-decene by ethenolysis reaction from a raw material of technical purity containing fatty acid alkyl esters and ethyl oleate content of at least 70%, comprising the following steps: a) preparation of the substrate - alkyl ester of oleic acid, b) preparation of the catalyst solution, c) contacting the catalyst solution with the substrate in the reactor, d) filling the reactor with ethylene gas, e) mixing the reaction mixture, f) pouring down the reaction mixture from the reactor, g) fractional distillation of the reaction mixture, h) hydrolysis of 9-decenoic acid alkyl esters, characterized in that in step a) the substrate is contacted with magnesol, and in step b) the catalyst solution is prepared by dissolving in toluene a ruthenium complex containing at least one carbene ligand with a five-membered heterocyclic ring containing two tertiary nitrogen atoms in which one of the nitrogen atoms is substituted with a thiophenomethylene substituent and the other nitrogen atom is substituted with an aromatic substituent containing at least one branched alkyl substituent containing at least three carbon atoms in the alkyl chain and the reaction in step e) is carried out for 2 to 8 hours and at a temperature of 50 °C to 80 °C under ethylene pressure 10 bar to 20 bar and in step f) the reaction mixture is contacted with the scavenger solution.