SO_4^(2-)/SnO_2固体超强酸的共沸除氯法制备、表征及其催化α-蒎烯异构化  

Preparation and Characterization of Solid Superacid SO_4^(2-)/SnO_2 by Azeotropic Dechlorination Method and Its Application in the Catalysis of α-Pinene Isomerization

作　　者：黄建团[1,2] 郭海福[1] 闫鹏[1] 郝向英[1] 陈志胜[1] 

机构地区：[1]肇庆学院化学化工学院,广东肇庆526061 [2]内蒙古工业大学化工学院,内蒙古呼和浩特010051

出　　处：《精细化工》2012年第4期330-337,共8页Fine Chemicals

基　　金：肇庆市科技计划项目(2009G013);肇庆市科技创新计划项目(2011G28)~~

摘　　要：采用共沸除氯法制备SO42-/SnO2固体超强酸,将其应用于α-蒎烯异构化。该催化剂的最佳制备条件:浸渍液硫酸浓度为1.5 mol/L,焙烧温度550℃,焙烧时间3.0 h;反应最佳条件为:反应温度110℃,反应时间3.0h,催化剂用量为松节油中α-蒎烯质量的5%;在该条件下,α-蒎烯转化率为100%,莰烯选择性为64.85%。采用FTIR、XRD、TG-DTA、SEM、BET对催化剂进行了表征。结果表明:相同制备条件下,共沸除氯法制备的SO42-/SnO2较溶胶凝胶法与沉淀法制备的SO42-/SnO2催化活性高,超强酸中心多,颗粒小且均匀,团聚少。Solid superacid SO42-/SnO2,which was prepared by azeotropic dechlorination method,was applied to catalyze α-pinene isomerization.The optimum conditions for the preparation of the catalyst were as follows：sulfuric acid as impregnation liquid 1.5 mol/L H2SO4,calcinated at 550 ℃ for 3.0 h.The optimum conditions for the isomerization reaction were：the reaction taking place at 110 ℃ for 3.0 h,the mass fraction of the catalyst being 5%（relative to the weight of α-pinene in turpentine）.Under these optimum conditions,the conversion of α-pinene was 100%,and the selectivity of camphene was 64.85%.The catalyst was characterized by means of FTIR,XRD,TG-DTA,SEM and BET.The results show that the catalytic activity of SO42-/SnO2 which was prepared by azeotropic dechlorination method was higher than that made by sol-gel and precipitation method under the same preparation conditions,and SO42-/SnO2 prepared by azeotropic dechlorination method had more super acid,smaller and more uniform particles and less reunion than that made by sol-gel and precipitation method.

关 键 词：共沸除氯 固体超强酸 Α-蒎烯 异构化 莰烯 催化技术 

分 类 号：TQ426.6[化学工程]