PROCESS FOR THE PREPARATION OF 3-(4-METHYL-3- CYCLOHEXEN-1-YL) BUTYRALDEHYDE

摘要

The invention relates to a process for the preparation of 3-(4-methyl-3-cyclohexen-1-yl) butyraldehyde by hydroformylation of limonene in the presence of a catalyst containing a metal of Group VIII of the Periodic Table, wherein the improvement consists in using as catalyst a rhodium carbonyl complex containing additionally a triphenyl and/or trialkyl phosphine as ligands and conducting the reaction at a pressure of 100 to 350 bars and at a temperature of 110 to 160.degree.C, the triphenyl or trialkyl phosphines or mixture thereof being present in an amount of 10 to 50 moles per gram atom of rhodium in the reaction mixture.