| abstract |
The present invention relates to a process for the hydrogenation of oligo- and / or polyesters obtainable by esterification of a DCL with a diol or diol mixture, wherein the hydrogenation is carried out in the presence of a catalyst whose catalyst precursor comprises copper oxide, alumina and at least one oxide of lanthanum , Iron, tungsten, molybdenum, titanium or zirconium and a process for the preparation of 1,6-hexanediol by catalytic hydrogenation of ester mixtures containing as main components oligo- and polyesters of adipic acid and 6-hydroxycaproic acid and by esterification of DCL with diols and in particular 1,6-hexanediol or diol mixtures can be obtained. |