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    • 10. 发明公开
    • Conversion of cycloalkanone into lactone
    • 环链烷酮转化为内酯
    • EP0569098A3
    • 1994-02-09
    • EP93201286.7
    • 1993-05-06
    • DSM N.V.
    • van Geem, Paul Christiaan
    • C07D315/00C07C45/41C07C51/235B01J23/34B01J23/84B01J37/03
    • C07D315/00B01J23/34B01J23/8892C07C45/41C07C51/255C07C47/54C07C63/06
    • The invention relates to a process for the oxidation of a cycloalkanone containing 6-12 carbon atoms to the corresponding lactone in the presence of a benzaldehyde with the aid of an oxygen-containing gas, the benzoic acid that is formed in the oxidation being hydrogenated to benzaldehyde and the benzaldehyde thus obtained being used again in the oxidation of cycloalkanone. A catalyst that is very suitable for the conversion of a benzoic acid into the corresponding benzaldehyde can be obtained via coprecipitation of a manganese salt, a salt from which an acid support is formed at a pH between 7 and 10 in the presence of a zinc salt and optionally a copper salt, through calcination, after precipitation, at a temperature of between 300 and 700°C and then reduction with the aid of a hydrogen-containing gas mixture.
    • 本发明涉及一种在苯甲醛存在下借助含氧气体将含6-12个碳原子的环烷酮氧化为相应的内酯的方法,氧化形成的苯甲酸被氢化成 苯甲醛和由此得到的苯甲醛再次用于环烷酮的氧化。 非常适合将苯甲酸转化为相应的苯甲醛的催化剂可以通过锰盐的共沉淀来获得,所述锰盐是在锌盐存在下,在7至10的pH下形成酸载体的盐 和任选的铜盐,沉淀后,通过煅烧,在300-700℃的温度下,然后借助含氢气体混合物还原。