Preparation of dimethyl adipate by the hydrogenation of dimethyl hex-3- endioate

摘要

A process for the preparation of dimethyl adipate by the hydrogenation of dimethyl hex-3-endioate, having the formula CH. sub.3 O. sub.2 CCH.sub.2 CH═CHCH.sub.2 CO.sub.2 CH.sub.3, derived from the oxidative carbonylation of 1,3-butadiene with a mixture of carbon monoxide and oxygen at a temperature of from 60° C. to 200° C. and pressures of from 15 psig to 5000 psig in the presence of a catalytic mixture of a platinum group metal compound and a copper or iron oxidant salt compound with at least a stoichiometric amount of a dehydrating agent, which comprises subjecting the dimethyl hex-3-endioate to a liquid phase hydrogenation at temperatures of from about ambient to about 150. degree. C. under hydrogen pressures of from about 10 psig to 1000 psig in the presence of an effective amount of a hydrogenation catalyst to produce dimethyl adipate, and recovering the dimethyl adipate.