Abstract The sulfuric acid-catalyzed self-condensation of cyclohexanone yields a mixture of products comprising 2-cyclohexylidene cyclohexanone(Ⅰ), 2-(1-cyclohexenyl)cyclohexanone (Ⅱ). Both Ⅰ and Ⅱ can be dehydrogenated on Pt-KOH/?-Al₂O₃ catalyst to obtain o-phenylphenol. Based on converted cyclohexanone, the conversion into dimer reached at around 80%. In the presence of low gas flux and appropriate alkaline content of dehydrogenation catalyst, o-phenylphenol was formed successfully with 60% selectivity and 98% conversion.
Key words Cyclohexanone, Self-condesation, o-Phenylphenol, Dehydrogenation

岳丽丽 蒋文伟 牟莉娟
(四川大学化学工程学院 成都 610065)

摘要 环己酮在硫酸催化作用下高选择性自聚，得到以2-(1-环己烯基)环己酮(Ⅱ)为主的二聚物。二聚物在Pt-KOH/?-Al₂O₃的催化作用下脱氢生成邻苯基苯酚。酸催化缩聚，环己酮的转化率能达到80%、选择性接近88%。当脱氢催化剂负载K₂O在3.36%和脱氢过程中保持较低气体通量条件下，成功合成了邻苯基苯酚，选择性为60%、转化率98%。
关键词 环己酮 自缩合 邻苯基苯酚 脱氢

2002-11-18收稿，2002-12-30修回

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