HZSM-5分子筛催化合成新型七元环缩醛(酮)的研究  

Study on Synthesis of Novel Seven-membered-ring Acetals(Ketals) over HZSM-5 Catalyst

作　　者：蓝平[1] 蓝丽红[1] 谢涛[1] 廖安平[1] 

机构地区：[1]广西民族大学化学与生态工程学院化学与生物转化过程新技术广西高校重点实验室,广西南宁530006

出　　处：《化学世界》2010年第9期545-548,共4页Chemical World

基　　金：广西科学研究与技术开发计划项目(桂科能0992928-13)

摘　　要：研究了HZSM-5分子筛催化1,4-丁二醇与环己酮的缩合反应,系统考察了反应时间、酮与醇的配比、HZSM-5分子筛用量等因素对酮与醇缩合反应的影响。结果表明,当n(酮)∶n(1,4-丁二醇)摩尔比为1∶1.5,催化剂用量为2.5g/1 mol酮,反应2 h,选择性为99.8%,转化率为93.5%,催化剂循环使用四次后,转化率仍在90%以上,说明HZSM-5分子筛对该反应有非常高的催化活性和稳定性。研究HZSM-5分子筛催化1,4-丁二醇与丁酮、丙醛、丁醛、异丁醛、戊醛、异戊醛、正辛醛、苯甲醛等八种醛(酮),同样的实验条件下,缩合反应选择性一般在97%以上,转化率也一般在90%以上,表明,HZSM-5分子筛对醛(酮)与醇的缩合反应有较好的催化性能。The acetalization and ketalization of various aldehydes and ketones with 1,4-butadiol using HZSM-5 as catalyst were studied.The process is highly effective,environmentally benign,and very selective.Effects of reaction time,mole ratio of reactants and amount of catalyst on yield of acetals（ketals） were investigated.Results showed that HZSM-5 was an efficient catalyst for acetalization and ketalization with high conversion and selectivity under mild conditions.The optimum reaction conditions were molar ratio of aldehydes and ketones to 1,4-butanediol was 1∶1.5;catalyst amount was 2.5 g / 1 mol aldehydes or ketones;and reaction time was 2 h.Furthermore,the conversion was over 90 % and the selectivity was over 97 %.

关 键 词：HZSM-5 七元环 缩醛(酮) 1 4-丁二醇 合成 催化剂 

分 类 号：TQ224.7[化学工程—有机化工]