制备条件对Raney Cu结构与性能的影响  

Effect of Preparing Condition of Raney Cu Catalyst on Its Structure and Activity

作　　者：曾小君[1] 杨高文[1] 杨刚[1] 廖维林[2] 

机构地区：[1]常熟高等专科学校应用化学研究所,江苏常熟215500 [2]江西师范大学化学与生物科学学院,江西南昌330027

出　　处：《江西师范大学学报（自然科学版）》2002年第1期43-47,共5页Journal of Jiangxi Normal University(Natural Science Edition)

基　　金：江苏省教育厅基金资助项目 (编号 0 0KJB15 0 0 10 )

摘　　要：利用旋铸法制备了快速凝固Cu3 3 .5Al66.5合金 .描述了新型RaneyCu催化剂在制备时的抽提工艺、抽提温度、抽提时间、碱液浓度及合金组成等因素对其结构特征和二乙醇胺脱氢氧化催化性能的影响规律 ,得到了较优化的催化剂制备参数 :采用改进的制备途径 ,合金铝铜比为 2 ,抽提温度为 80℃ ,抽提时间 2h ,碱液浓度为 2 0 %NaOH ;所制备的RaneyCu催化剂具有较高的活性和选择性 ,催化剂重复使用 2 6次后 ,亚氨基二乙酸的转化率≥ 95 % .In this paper,the rapidly solidified Cu 33.5 Al 66.5 alloy was prepared by planar flow casting technique.The effects of preparation variables including leaching methods,leaching temperature,leaching time,alkali concentration,alloy composition on the structure features and catalytic properties on the dehydrogenation oxidation of diethanolamine of Raney Cu were investigated in detail.The optimized process for the Raney Cu preparation are obtained,which was using the improved leaching method,leaching temperature of 80℃,leaching time of 2 h,sodium hydroxide concentration of 20%,and the Cu Al alloy with Al/Fe ratio of 2.The results show that the rapidly solidified Raney Cu has better activity than the regular Raney Cu catalyst.The rapidly solidified Raney Cu catalyst remains high activity and long life after being used 26 times,the percent conversion of iminodiacetic acid is ≥95%.

关 键 词：快速凝固 抽提工艺 RANEY CU催化剂 微孔分布 脱氢氧化 铜铝合金 亚氨基二乙酸 制备条件 催化性能 

分 类 号：TQ426.81[化学工程] TQ225.122