公开(公告)号：CA1126754A

公开(公告)日：1982-06-29

申请号：CA333752

申请日：1979-08-14

Applicant: BASF AG

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

IPC: C07C69/44 ,  B01J31/00 ,  C07B61/00 ,  C07C67/38 ,  C07C67/48 ,  C07C69/34 ,  C07C69/533

Abstract: O.Z. 0050/033380 In a process for the preparation of dimethyl butanedicarboxylates, whereina) butadiene or a hydrocarbon mixture containing butadiene is reacted with carbon monoxide and methanol in the presence of a tertiary nitrogen base and a cobalt carbonyl catalyst at from 80 to 150.degree.C under superatmospheric pressure,b) the greater part of the tertiary nitrogen base and any excess hydrocarbons are removed andc) the methyl pentenoate thus obtained is reacted with carbon monoxide and methanol, in the presence of a cobalt carbonyl catalyst and the residual amount of tertiary nitrogen base, at from 140 to 200.degree.C under superatmospheric pressure, to give the dimethyl butanedicarboxylate, the improvement that the reaction mixture obtained in stagea) after reaction of the butadiene is cooled until it separates into two phases, and a part-stream of from 20 to 80% by volume of the lower phase is recycled to stage a).

公开(公告)号：DE3631679A1

公开(公告)日：1988-03-24

申请号：DE3631679

申请日：1986-09-18

Applicant: BASF AG

Inventor： LEMAN OTTO ,  LENDLE HUBERT DR ,  MAGNUSSEN PETER DR

IPC: C07D213/06 ,  C07C67/36 ,  C07C67/54 ,  C07C69/24

公开(公告)号：DE3565674D1

公开(公告)日：1988-11-24

申请号：DE3565674

申请日：1985-03-28

Applicant: BASF AG

Inventor： SCHNEIDER HEINZ-WALTER DR ,  KUMMER RUDOLF DR ,  LEMAN OTTO ,  PANITZ PAUL

IPC: B01J31/00 ,  B01J31/20 ,  C07B61/00 ,  C07C67/38 ,  C07C67/54 ,  C07C69/533

公开(公告)号：DE2960159D1

公开(公告)日：1981-03-26

申请号：DE2960159

申请日：1979-08-16

Applicant: BASF AG

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

IPC: C07C69/44 ,  B01J31/00 ,  C07B61/00 ,  C07C67/38 ,  C07C67/48 ,  C07C69/34 ,  C07C69/533