新型Cu/ZrO_2环己醇脱氢催化剂的制备  

Preparation of Cu/ZrO_2 cyclohexanol dehydrogenation catalyst

作　　者：王锋[1] 杨运泉[1] 段正康[1] 余剑[1] 刘文英[1] 

机构地区：[1]湘潭大学化工学院,湖南湘潭411105

出　　处：《工业催化》2005年第7期28-31,共4页Industrial Catalysis

基　　金：科技部科技型中小企业创新基金项目(03C621430042);湖南省自然科学基金项目(01JJY2010);湖南省教育厅青年基金项目(01B004)

摘　　要：以硝酸铜、氧氯化锆为原料,配制成n(Zr)∶n(Cu)=(1~4)∶1的溶液,以w(NaOH)=15%溶液为沉淀剂,采用共沉淀法,制备出新型Cu/ZrO2环己醇脱氢催化剂。通过正交试验选择出较优的催化剂制备条件为:n(Zr):n(Cu)=2∶1,锆盐初始浓度0.2mol.L-1,焙烧时间5h,焙烧温度400℃,滴定终点pH值为12。考察了催化剂预处理、反应温度等对脱氢过程产物收率和选择性的影响。在优化条件下制得的催化剂用于环己醇脱氢时,环己酮产品收率达85%,选择性近100%。Cu/ZrO_2 cyclohexanol dehydrogenation catalyst was prepared by co-precipitation of copper nitrate and zirconium oxychloride solution with n(Zr)n(Cu)=(1-4)1, using 15% sodium hydroxide as the precipitant. Optimum preparation condition was determined by orthogonal experiment as follows: n(Zr)n(Cu)=21,initial concentration of zirconium oxychloride = 0.2 molL^(-1), calcination time 5 h, calcinations temperature 400 , pH at the end of titration = 12. Influence of pretreatment of the catalyst, reaction temperature on the yield and selectivity was investigated. Cyclohexanone yield of 85% and selectivity to cyclohexanone of nearly 100% were attained over the catalyst prepared under optimum condition.

关 键 词：环已醇脱氢 催化剂制备 环已酮 

分 类 号：O624.31[理学—有机化学] O643.38[理学—化学]