PROCEDE DE CARBONYLATION REDUCTRICE D'ALDEHYDES PAR L'INTERMEDIAIRE D'HEMIACETAL-ESTERS, CATALYSEE PAR LES COMPLEXES CARBONYLES DU COBALT

摘要

The invention concerns a process for reducing carbonylation of an aldehyde wherein the aldehyde is used as hemiacetalester, the reaction being conducted in the presence of a catalyst consisting of a cobalt carbonyl complex. The hemiacetal-ester may be formed in situ by reacting an acetal with an anhydride of acid. The process preferentially yields alkylene-glycol mono-esters, free of esterified, for a ratio H2/CO ranging from 1:1 to 3:1 and preferentially 2-alkoxy aldehydes, for a ratio H2/CO ranging from 0.1:1 to 0.5:1.