Preparation of 1,4-butanediol

Details Preparation of 1,4-butanediol Preparation of 1,4-butanediol

C - Chemistry, Metallurgy

07

C

260/635.1

C07C 29/17 (2006.01) C07C 31/20 (2006.01)

Patent

CA 2038710

A process for the preparation of 1,4-butanediol by catalytically hydrogenating maleic anhydride in the presence of an alcohol, at elevated temperature and elevated pressure and with the aid of a cobalt-containing catalyst comprises partially hydro- genating the reaction mixture in a first hydrogenation step at from 100 to 200°C and at from 30 to 200 bar and subsequently post-hydrogenating the product of this first hydrogenation step, without further work-up at higher temperature and pressure than in the first hydrogenation step, in a second hydrogenation step at from 200 to 300°C and at from 200 to 350 bar.

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