SiO2催化碳酸二甲酯和乙酸苯酯合成碳酸二苯酯.pdf

石油学报(石油加工)
2014年10月
ACTA PETROLEI SINICA(PETROLEUM PROCESSING SECTION)
第30卷第5期
文章编号:1001-8719(2014)05-0823-06
负载型MoO3/SiO2催化碳酸二甲酯和乙酸苯酯
合成碳酸二恭酯
曹平2,王公应
(1.重庆理工大学化学化工学院,重庆400054;2.中国科学院成都有机化学研究所,四川成都610041;
3.常州化学研究所常州市绿色化学和技术重点实验室,江苏常州213164)
摘要:采用溶胶凝胶法制备用于碳酸二甲酯(DMC)和乙酸苯酯(PA)合成碳酸二苯酯(DPC)的MoO2/SO2催化剂,
并对其进行N2吸附-脱附、XRD表征。考察焙烧温度、MoO3负载量以及反应条件等对该催化剂在DMC和PA酯
交换反应中催化性能的影响。结果表明,焙烧温度为500℃、MoO2负载量(m(MoO)/m(MoO。+SiO2))为0.2(
时,制备得到的MoO3/SiO2催化剂在DMC和PA酯交换反应中的催化性能最优,在适宜的反应条件
(m( Catalyst)=6.0g,n(PA)=1.0mol,n(PA)/n(DMC)=2,T=180℃,な=5h)下,DMC转化率达71.1%,甲
基苯基碳酸酯(MPC)及DPC的选择性分别为52.0%和43.5%。随着MoO3负载量的增加,MoO)3/SiO2催化剂比
表面积降低,但催化性能却逐渐变好;载体SiO2为无定形,活性组分MoO3的(021)、(11)、(040)晶面取向随负
载量的增加而发生改变,因此,催化剂的催化性能与活性组分MoO3的晶面取向和载体与活性组分间的协同作用
有着一定的关系,择优取向晶面(021)、(10)更有利于DMC和PA合成DPC反应
关键词;MoOa/SiO2催化剂;择优取向晶面;碳酸二甲酯;乙酸苯酯;碳酸二萃酯
中图分类号:O643.32文献标识码;Adoi:10.3969/.issn.1001-8719.2014.05.010
Supported Moo /Sio Catalyst for Transesterification of Dimethyl Carbonate and
Phenyl Acetate to Diphenyl Carbonate
CAO Ping WANG Gongying 2,3
(1. School of Chemical Engineering, Chongging University of Technology, Chongqing 400054, China
2. Chengdu Institute of Organic hemistry, The Chinese Academy of Se
ences
610041, China
3. Changzhou Key Laboratory of Green Chemistry &Technology, Changzhou Institute of Chemistry, hangzhou 213164, China)
Abstract: Supported Moo3 /Sio catalyst was prepared by sol-gel method and used for the synthesis
of diphenyl carbonate(DPC) by transesterification of dimethyl carbonate(DMC) with pheny
acetate (PA). Ne adsorption/desorption measurement, X-ray diffraction (XRD) were used for the
characterization of prepared Moo /Sio2. The effects of calcination temperature, MOO loading and
reaction conditions on the catalytic performance of the Mooa/Sio in transesterification of DMC and
PA were investigated. The results showed that the Moo /Sio2 catalyst with m(Mo3)/m(Moo]-
Sio )=0.20, calcined at 500C, exhibited excellent catalytic activity in transesterification of DMC
and PA. When the transesterification was carried out at 180C, with 6 g catalyst, 1.0 mole PA
n(PA)/n(DM)=2, for 5 h, the conversion of DMC was 71. 1% and the selectivity of DPC and
收稿日期:2013-09-18
基金项目:国家“十ー五”科技支撑计划(2006BAEO2BO3)、重庆市教委科学技术研究项目(KJ110815)、重庆理工大学科学研究基金项目
(2010ZD29)、江苏省常州市工业科技攻关计划项目(CE208091)资助
通讯联系人:曹平,男,高级工程师,博士,从事化工清洁生产及催化剂技术研究和精细化工产品开发;Tel:023-62563221,E-mail:c.p-9
(@163.com;gwang(@cioc.accn