共沸除氯工艺制备稀土固体超强酸SO_4^(2-)/SnO_2-Nd_2O_3及其表征  

Preparation and characterization of solid superacid SO_4^(2-)/SnO_2-Nd_2O_3 by azeotropic dechlorination method

作　　者：黄建团[1,2] 郭海福[1] 闫鹏[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：《化学研究与应用》2013年第2期146-151,共6页Chemical Research and Application

基　　金：肇庆市科技计划项目(2009G013)资助;肇庆市科技创新计划项目(2011G28)资助;广东省普通高校工程技术开发中心建设项目(GCZX-B0902)资助

摘　　要：采用共沸除氯工艺制备固体超强酸SO42-/SnO2-Nd2O3,可免除抽滤,大大节省催化剂的制备时间。将其应用于α-蒎烯的异构化反应,考察了催化剂的最佳制备条件,并利用FT-IR、XRD、TG-DTA、BET等技术对催化剂进行了表征。结果表明,稀土Nd2O3的引入,延缓了SnO2晶化,提高了SO42-/SnO2的催化活性;催化剂最佳制备条件为:Nd2O3引入量为SnO2的3 mol%,浸渍液浓度1.0 mol/L,焙烧温度500℃,焙烧时间2 h。The preparation time of the catalysts could be greatly saved because of removing filtration, when the solid superacid S04^2-/Sn O2-Nd2 O3were prepared by azeotropic dechlorination method. The proper preparation conditions of the catalyst were inves- tignted using the isomerizate reaction of ct-Pinene, and the catalysts were characterized by XRD,FTIR,TG-DTA,BET et al. The re- suits showed that rare earth Nd203 can delay crystallization of SnOz and improve the catalytic aqtivity of Solid Superacid S04^2-/Sn O2-Nd2 O3,and the optimum preparation conditions of the solid superacid S04^2-/Sn O2-Nd2 O3were as foUow：content of Nd203 3 mol% （ mole fraction in SnO2 ）, concentration of impregnating solution 1.0 moL/L, calcining temperature 500℃ for 2 h.

关 键 词：共沸除氯 固体超强酸 三氧化二钕 Α-蒎烯 异构化 

分 类 号：O614.4[理学—无机化学]