负载型金属复合氧化物催化剂催化对叔丁基甲苯液相氨氧化反应  

Study of p-tert-Butyltoluene Liquid Phase Ammoxidation on Mixed Oxides Supported Catalyst

作　　者：刘琳[1] 钟敏[1] 刘源[1] 冯俊[1] 马玉龙[1] 

机构地区：[1]武汉大学化学与分子科学学院,湖北武汉430072

出　　处：《石油化工》2005年第2期111-115,共5页Petrochemical Technology

基　　金：国家自然科学基金资助项目(20376064)

摘　　要：采用负载型金属复合氧化物催化剂,对气相氨氧化反应条件下不稳定的对叔丁基甲苯进行了液相氨氧化反应研究。结果表明,以S iO2为载体,用浸渍法制备的金属复合氧化物催化剂对对叔丁基甲苯液相氨氧化反应具有较高的催化活性,在反应温度220℃、空气与氨的摩尔比为7、催化剂用量5g的条件下,吸氧速率可达3.38m ol/(m in.m ol),对叔丁基甲苯的转化率为35.92%,对叔丁基苯腈的选择性为97.14%,并且催化剂可以多次重复使用。差热分析结果表明,催化剂失活的主要原因是积碳,经高温焙烧后,催化剂的活性可以恢复。Liquid phase ammoxidation of p-tert-butyltoluene (PTT) to p-tert-butylbenzonitrile (PTBN) without solvent had been investigated in presence of a mixed oxides supported catalyst prepared by impregnation. The optimum reaction conditions were: mole ratio of air to ammonia,7, catalyst dosage 5 g and reaction temperature,220°C. The conversion of PTT and selectivity of PTBN could reach 35.92% and 97.14%, respectively. Selectivity was much higher than the conventional methods. The catalyst was characterized by DTA. Inactivation of catalyst was mainly due to carbon deposition on the catalyst and could be regenerated by calcination.

关 键 词：液相氨氧化 对叔丁基甲苯 对叔丁基苯腈 负载型催化剂 

分 类 号：TQ203.2[化学工程—有机化工]