非均相催化一步合成碳酸二苯酯反应工艺的研究  

Study on Reaction Technics for Synthesizing Diphenyl Carbonate Directly Through Heterogeneous Catalysis

作　　者：金放[1] 吴元欣[1] 吴广文[1] 张光旭[1] 李定或[1] 

机构地区：[1]武汉化工学院湖北省新型反应器与绿色化工重点实验室,湖北武汉430074

出　　处：《化学与生物工程》2005年第5期18-20,共3页Chemistry & Bioengineering

基　　金：国家自然科学基金项目(20476083)

摘　　要：采用钯负载的La0.62Pb0.38MnO3钙钛矿催化体系氧化羰化合成碳酸二苯酯。考察了固相催化剂的制备工艺、液相溶剂和助剂、气相压力、组成对该多相催化反应的影响。研究表明:柠檬酸络合物法制备的载体所对应的催化剂催化活性优于共沉淀法和微乳液法,应用沉淀法负载活性成分优于浸渍法,H2PdCl2作为活性Pd源较Na2PdCl4好;苯醌、氢醌、二氯甲烷是该反应体系的良好助剂和溶剂;在压力一定的条件下,控制O2的分压可使DPC收率达到最佳化。加入溶剂二氯甲烷和助剂苯醌,当溶剂与苯酚的质量比达到5∶1时,DPC的产率可达到20%。Diphenyl carbonate (DPC) was synthesized by oxidative carbonation method using pervoskite oxide as support on which the active component Pd were tethered. The preparation technics of catalyst,effect of solvent and redox reagent in liquid phase, pressure and content of gas phase were studied. It was that the carrier prepared by citrate process was better for synthesized DPC than co-precipitation and microemulsion method. The activeness of catalyst which tether H_(2)PdCl_(2) by co-precipition process was higher than Na_(2)PdCl_(4) as Pd source and dipping process. p-Benzoquinone,hydroquinone,methylene dichloride can be chosen as reagent and solvent for this catalyst system. When the pressure was fixed, DPC yield could reach optimazition by control the O_(2) content in gas.The yield of DPC can reach 20% in the condition of m(CH_(2)Cl_(2))∶m(phenol)=5∶1.

关 键 词：碳酸二苯酯 钙钛矿栽体 负载型催化剂 

分 类 号：O643.36[理学—物理化学]