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    3.
    发明专利
    未知

    公开(公告)号：DE3825296A1

    公开(公告)日：1990-02-01

    申请号：DE3825296

    申请日：1988-07-26

    Applicant: BASF AG

    Inventor： MAERKL ROBERT DR ,  HARDER WOLFGANG DR

    IPC: B01J31/20 ,  B01J31/40 ,  C07B61/00 ,  C07C67/38 ,  C07C69/533

    Abstract: Alkyl pentenoates are prepared by (a) reacting butadiene or a butadiene-containing hydrocarbon mixture with carbon monoxide and an alkanol in the presence of a tertiary aromatic heterocyclic nitrogen base and a cobalt carbonyl catalyst at from 80 DEG to 160 DEG C. under from 100 to 1,000 bar to obtain a reaction mixture which contains alkyl pentenoate, C6-diester, tertiary nitrogen base, alkanol, butadiene, hydrocarbon and by-product, (b) substantially removing from the reaction mixture obtained any excess hydrocarbon, nitrogen base, alkanol and alkyl pentenoate by distillation to obtain a residue which contains cobalt carbonyl catalyst, (c) bringing the residue which contains cobalt carbonyl catalyst into contact with a mixture of carbon monoxide and hydrogen at elevated temperature and elevated pressure, and (d) recycling the residue which contains cobalt carbonyl catalyst into alkyl pentenoate synthesis stage (a).

    6.
    发明专利
    未知

    公开(公告)号：DE3862437D1

    公开(公告)日：1991-05-23

    申请号：DE3862437

    申请日：1988-06-08

    Applicant: BASF AG

    Inventor： BERTLEFF WERNER DR ,  MAERKL ROBERT DR ,  ROEPER MICHAEL DR

    IPC: C07B61/00 ,  B01J31/20 ,  C07C67/313 ,  C07C67/38 ,  C07C69/67

    Abstract: omega -Formylalkanecarboxylic esters are prepared by hydroformylation of alkenecarboxylic esters with carbon monoxide and hydrogen at elevated temperature and under elevated pressure in the presence of cobalt carbonyl complexes, in which alpha , beta -unsaturated alkenecarboxylic esters are hydroformylated in the presence of 0.01 to 1 mol% of cobalt carbonyl complexes, calculated as cobalt, while maintaining a conversion of alpha , beta -unsaturated alkenecarboxylic esters of 10 to 70 %.

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