无溶剂法OMS-2催化氧化苯甲醇制苯甲醛的研究  

Research on oxidation of benzyl alcohol to benzaldehyde catalyzed by OMS-2 under solvent free conditions

作　　者：蔡妃妹[1] 余林[1] 孙明[1] 刁贵强[1] 成晓玲[1] 余倩[1] 王路枝[1] 任永辉[1] 曹小荣[1] 

机构地区：[1]广东工业大学轻工化工学院,广东广州510006

出　　处：《无机盐工业》2013年第1期50-53,共4页Inorganic Chemicals Industry

基　　金：广东省自然科学基金(10251009001000003)

摘　　要：以高锰酸钾和富马酸为原料,采用超声波辅助溶胶-凝胶法快速合成氧化锰八面体分子筛(OMS-2),并考察了不同锰氧化物在无溶剂、无卤素条件下用70%过氧化氢叔丁醇(TBHP)氧化苯甲醇合成苯甲醛反应中的催化活性。结果表明,该体系是一种高效的环境友好催化体系,OMS-2在反应过程中显示了较高的活性,在80℃下,反应4 h,苯甲醇转化率、苯甲醛收率和选择性分别为44.72%、34.31%和76.74%。对该催化体系的重复使用性能进行了考察,结果发现,催化剂重复使用3次之后,苯甲醛收率和选择性稍微降低,表明OMS-2催化剂循环使用活性较好。Octahedral manganese oxide-based molecular sieves （OMS-2） were rapidly synthesized by sol-gel method under ultrasonic irradiation with KMnO4and fumaric acid as raw materials.The catalytic activities of different manganese oxides ap- plied in the reaction of using 70% aqueous tert-butyl hydroperoxide （TBHP） to oxidize benzyl alcohol for synthesizing ben- zaldehyde under the solvent free and halogen free conditions were investigated.Results showed that this system was an effi- cient and environment-friendly catalytic system;the catalytic activity of OMS-2 was very high;and conversion of benzyl alco- hol,yield,and selectivity of benzaldehyde were 44.72% ,34.31% ,and 76.74% at 80℃ for 4 h,respectively.Furthermore, af- ter reusing 3 times, the yield, and selectivity of benzaldehyde decreased slightly and OMS-2 was found to have good catalytic activity in the recycle tests.

关 键 词：氧化锰八面体分子筛 苯甲醇 选择性氧化 苯甲醛 

分 类 号：TQ137.12[化学工程—无机化工]