Preparation of dimethyl adipate by the hydrogenation of dimethyl

Details Preparation of dimethyl adipate by the hydrogenation of dimethyl Preparation of dimethyl adipate by the hydrogenation of dimethyl

1978-11-24

1980-02-19

Thomas, Jr., James O.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carboxylic acid esters

560204, C07C 6944

Patent

active

041895991

ABSTRACT:
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.dbd.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.degree. C. to 200.degree. 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.

REFERENCES:
patent: 3725489 (1973-04-01), Fuhrmann et al.
patent: 3737395 (1973-06-01), Arnold et al.
patent: 3755194 (1973-08-01), Avilov et al.
Carraro, Giorgi et al., "Adipic Acid from 1,3-Butadiene," German Offen. No. 1,904,429 (see Chemical Abstracts, vol. 72, 1970 #12118u).

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