SO_4^(2–)/TiO_2-SnO_2固体酸催化剂的制备及其催化合成丙烯酸苄酯  

Preparation of SO_4^(2–)/TiO_2-SnO_2 solid acid catalyst and its catalytic activity in synthesis of benzyl acrylate

作　　者：潘柳依[1,2] 淡勇 王军峰[3] 牛梦龙[4] 范铮 李稳宏[1] PAN Liuyi;DAN Yong;WANG Junfeng;NIU Menglong;FAN Zheng;LI Wenhong(School of Chemical Engineering,Northwest University,Xi’an 710069,Shaanxi,China;School of Chemistry and Chemical Engineering,Baoji University of Arts and Sciences,Baoji 721013,Shaanxi,China;Shaanxi Yanchang Petroleum(Group)Co.,Ltd.,Xi’an 710075,Shaanxi,China;College of Chemistry&Chemical Engineering,Xi’an Shiyou University,Xi’an 710065,Shaanxi,China)

机构地区：[1]西北大学化工学院,陕西西安710069 [2]宝鸡文理学院化学化工学院,陕西宝鸡721013 [3]陕西延长石油(集团)有限责任公司,陕西西安710075 [4]西安石油大学化学化工学院,陕西西安710065

出　　处：《化工进展》2018年第5期1823-1830,共8页Chemical Industry and Engineering Progress

摘　　要：采用共沉淀法制备了SO_4^(2–)/TiO_2-SnO_2固体酸催化剂,利用SEM-EDS、XRD、FTIR、Py-IR、XPS等技术对其进行了表征,结果表明:Sn掺杂会改变催化剂晶型结构与酸性中心的数量和分布情况。在Sn掺杂量为5%、焙烧温度为500℃条件下,将其用于丙烯酸苄酯合成,显示了良好的催化活性。通过对反应条件进行优化,结果表明:酸醇摩尔比为1.3∶1、催化剂用量3%、反应温度120℃时,反应苯甲醇的转化率为93.1%,产物选择性为98.8%。与SO_4^(2–)/TiO_2相比,其反应活性与稳定性显著提高,抗结焦能力增强。SO4 2–/TiO2-SnO2 solid acid catalysts prepared by co-precipitation method and then were characterized by SEM-EDS,XRD,FTIR,Pyridine-IR and XPS.The result showed that crystal structure of the catalyst,and the quantity and distribution of the acid centers were changed by doping Sn.The catalyst doped with 5%Sn and calcined at 500℃showed excellent catalytic activity in the synthesis of benzyl acrylate.Under the optimal conditions of 3%catalyst,reaction temperature of 120℃,and ratio of acid and olefin of 1.3∶1,the conversion of phenylcarbinol was 93.1%and the selectivity of the product was 98.8%.Compared with SO4 2–/TiO2,the reactivity,stability and the anticaking ability were significantly improved.

关 键 词：固体酸催化剂 锡掺杂 丙烯酸苄酯 

分 类 号：TQ231.2[化学工程—有机化工]