Manufacture of 1,4-butanediol

Details Manufacture of 1,4-butanediol Manufacture of 1,4-butanediol

C - Chemistry, Metallurgy

07

C

260/635.1

C07C 29/00 (2006.01) C07C 29/141 (2006.01)

Patent

CA 1052394

ABSTRACT OF THE DISCLOSURE: 1,4-Butanediol is manufactured by reacting cyclic acrolein acetals of alkanediols of 2 to 4 carbon atoms with carbon monoxide and hydrogen in the presence of cobalt carbonyl complexes or rhodium carbonyl complexes which are modified with tertiary organic phosphines, at a temperature of from 80 to 200°C under a pressure of from 5 to 100 atm., and hydrogenating the resulting 3-formylproprionaldehyde-acetals and the 4-hydroxybutyraldehyde- acetals produced at the same time in the presence of water and hydrogenation catalysts, at a temperature of from 70 to 150°C and under a pressure of from 100 to 300 atm. The process has the advantage of good yields and simplicity. 1,4-Butanediol can be used for the manufacture of tetrahydrofuran, an important solvent, and for the manufacture of polyesters and also, in particular, polyurethanes.

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