公开(公告)号：CA1126752A

公开(公告)日：1982-06-29

申请号：CA319539

申请日：1979-01-12

Applicant: BASF AG

Inventor： KUMMER RUDOLF ,  SCHNEIDER HEINZ-WALTER ,  WEISS FRANZ-JOSEF

IPC: C07C69/40 ,  B01J31/00 ,  C07B61/00 ,  C07C67/38 ,  C07C69/34 ,  C07C69/44 ,  C07C67/36

Abstract: O.Z. 0050/033014 In a process for the preparation of butanedicarboxylic acid esters bya) reacting butadiene or hydrocarbon mixtures containing butadiene with carbon monoxide and a C1-C4-alkanol in the presence of a tertiary nitrogen base and a cobalt carbonyl catalyst at from 80 to 150.degree.C under superatmospheric pressure,b) removing the greater part of the tertiary nitrogen base together with any excess hydrocarbon andc) reacting the resulting pentenoic acid ester, in the presence of the catalyst remaining in the reaction mixture, and in the presence of the remaining amount of tertiary nitrogen base, with carbon monoxide and a C1- to C4-alkanol at from 140 to 200.degree.C under superatmospheric pressure, to give the butanedicarboxylic acid ester, the improvement wherein the reaction mixture in stage c) is substantially free from dissolved butadiene or butadiene bonded to the catalyst. Butanedicarboxylic acid esters may be used for the preparation of polymers.