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    • 2. 发明公开
    • Method for the preparation of cyclohexanol and/or cyclohexanone
    • 环己烷和/或环己酮的制备方法
    • EP0023379A3
    • 1981-02-11
    • EP80200725
    • 1980-07-25
    • STAMICARBON B.V.
    • van Geem, Paul Christiaande Graaf, Theodorus Franciscus MariaKnol, DirkPlantema, Otto Gerrit
    • C07C45/34C07C45/39C07C49/403C07C29/06C07C29/05C07C29/08C07C35/08C07C05/11C07C13/20
    • C07C45/34C07C5/11C07C29/04C07C29/05C07C29/06C07C29/08C07C45/39C07C2523/46C07C2601/14C07C2601/16Y02P20/52C07C13/20C07C49/403C07C35/08
    • The invention relates to a method for the preparation of cyclohexanol and/or cyclohexanone by hydrogenating benzene to cyclohexene, hydrating the cyclohexene to cyclohexanol and/or oxidating it to cyclohexanone, recovering the cyclohexanol and/or cyclohexanone, and returning unconverted benzene and/or cyclohexene to the hydrogenating step. The method according to the invention is characterized in that the mixture of cyclohexane with benzene and/or cyclohexene, which has also been obtained during the separation of cyclohexanol from the reaction mixture of the hydration step and,or of cyclohexanone from the reaction mixture of the oxidation step, is subjected to a dehydrogenation reaction, and the benzene thus obtained is returned to the hydrogenation step. The method according to the invention has the great advantage that the difficult separation of cyclohexane from mixtures with benzene and / or cyclohexene can be dispensed with. Losses of expensive extractive distillation agent are avoided. Neither is any cyclohexane left as by-product for wich a use will have to be found. In the hydrogenation step a higher degree of benzene conversion can be applied, so that economic process operation has become possible.
    • 一种从苯制备环己醇和/或环己酮的改进方法。 环己醇和/或环己酮是通过氢化苯形成含有环己烯,未反应的苯和副产物环己烷的氢化反应混合物,由此得到的环己烯水解形成含有环己醇,未反应的苯和副产物的水合反应混合物 环己烷和/或氧化该环己烯以形成含有环己酮,未反应苯和副产物环己烷的氧化反应混合物,从所述水合反应混合物中回收环己醇产物和/或从所述氧化反应混合物回收环己酮产物和含有 未反应的苯和副产物环己烷,并将未转化的苯循环到苯加氢步骤。 改进之处在于将含有未反应苯和副产物环己烷的有机相引入脱氢区,其中将副产物环己烷脱氢成苯并与未反应的苯一起再循环到氢化步骤。