H2O2直接氧化苯制备苯酚的研究-化学工程与技术专业毕论文.docx

关键词：苯，苯酚，羟基化，添加剂，吸附II 关键词：苯，苯酚，羟基化，添加剂，吸附 II 万方数据 STUDY STUDY oN THE DⅡmCT HYDRoXYLATION OF BENZENE To PHENOL WITH HYDROGEN PERoXIDE ABSTRACT Phenol is one of the important raw materials in organic chemical industry．It was mainly used for producting resins，pharmaceutical intermediates，pesticides，perfumes，dyes，additives and other fine chemicals materials．In recent years，due to the rapid development of Chinese economy,the demand rate for phenol was growing fast．Although phenol production has also increased year by ye虬it still couldn’t meet the consumption of phen01．Traditional production of phenol Was primarily by the reaction of benzene with propylene．The first product Was the cumene，then the cumene Was oxidated to phen01．However，111is method has many disadvantages like long process，the consumption of propylene and the production of by-product．Therefore，the exploration of a green preparation phenol attracts much attention and it has become a hot research topic．The direct oxidation of benzene to phenol by hydrogen peroxide in one step has become one of the green reaction because it has many advantages，such as the only by-product of water,the environmentally friendly process，the facile step，the higll atom economy and low cost．The contents and results are summarized as follows： The Cu9@C catalyst Was directly prepared with glucose and copper(II)sulfate by a one-pot hydrothermal method．The catalytic performance Was investigated for the hydroxylation of benzene to phenol with hydrogen peroxide as the oxidant．The features of the reaction system with the prepared heterogeneous catalyst were studied by various reaction parameters including reaction temperature，catalyst amount， hydrogen peroxide amount，reaction time，effect of solvents and additives． With glucose as the additive，the maximum yield of phenol Was 1 3．0％ under the reaction conditions of 1．0 mL benzene，3．0 mL acetonitrile，50 mg catalyst，3．0 mL H202，at 50 oC for 4 h． To further improve the the catalytic performance