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    • 2. 发明授权
    • Preparation of alkyl pentenoates
    • 戊烯酸烷基酯的制备
    • US4925972A
    • 1990-05-15
    • US378794
    • 1989-07-12
    • Robert MaerklWolfgang Harder
    • Robert MaerklWolfgang Harder
    • B01J31/20B01J31/40C07B61/00C07C67/38C07C69/533
    • C07C69/533
    • 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.degree. to 160.degree. C. under from 100 to 1,000 bar to obtain a reaction mixture which contains alkyl pentenoate, C.sub.6 -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).
    • 戊烯酸烷基酯通过以下步骤制备:(a)在叔芳族杂环氮碱和羰基钴催化剂存在下,在80〜160℃下,将丁二烯或含丁二烯的烃混合物与一氧化碳和链烷醇反应, 至1,000巴以获得含有戊烯酸烷基酯,C6-二酯,叔氮碱,链烷醇,丁二烯,烃和副产物的反应混合物,(b)从反应混合物中大量除去得到的任何过量的烃,氮碱,链烷醇和 通过蒸馏得到含有羰基钴催化剂的残余物,(c)在升高的温度和升高的压力下使包含羰基钴催化剂的残余物与一氧化碳和氢气的混合物接触,和(d)将残余物 含有羰基羰基催化剂成为戊烯酸烷基酯合成阶段(a)。