C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/486.7
C07C 67/36 (2006.01) C07C 69/44 (2006.01)
Patent
CA 1126752
O.Z. 0050/033014 Abstract of the Disclosure: In a process for the prepara- tion of butanedicarboxylic acid esters by a) 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°C under superatmospheric pressure, b) removing the greater part of the tertiary nitrogen base together with any excess hydrocarbon and c) 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°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.
319539
Kummer Rudolf
Schneider Heinz-Walter
Weiss Franz-Josef
Basf Aktiengesellschaft
Robic Robic & Associes/associates
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