MCM-56分子筛催化苯与丙烯液相烷基化反应性能

高等学校化学学报 ›› 2009, Vol. 30 ›› Issue (7): 1380.

MCM-56分子筛催化苯与丙烯液相烷基化反应性能

张钰^1,2, 赵飞¹, 李正², 赵胤², 邓广金², 邢海军³, 贾明君³, 张文祥³, 吴通好³

1. 吉林化工学院化工系, 吉林 132022;
2. 中国石油吉林石化公司研究院, 吉林 132021;
3. 吉林大学化学学院, 长春 130012

收稿日期:2008-09-19 出版日期:2009-07-10 发布日期:2009-07-10
通讯作者: 贾明君, 男, 博士, 教授, 主要从事多相催化研究. E-mail: jiamj@jlu.edu.cn
基金资助:
吉林省科技厅科技发展计划项目(批准号: 20080310)、吉林省教育厅“十一五”科学技术研究项目(批准号: 吉教科合字[2008]第180号)和中国博士后科学基金面上资助.

Catalytic Performance of MCM-56 Molecular Sieve for Benzene Alkylation with Propylene

ZHANG Yu^1,2, ZHAO Fei¹, LI Zheng², ZHAO Yin², DENG Guang-Jin², XING Hai-Jun³, JIA Ming-Jun^3*, ZHANG Wen-Xiang³, WU Tong-Hao³

1. Jilin Institute of Chemical Technology, Jilin 132022, China;
2. Research Institute of China National Petrolume Jilin Corporation, Jilin 132021, China;
3. College of Chemistry, Jilin University, Changchun 130012, China

Received:2008-09-19 Online:2009-07-10 Published:2009-07-10
Contact: JIA Ming-Jun. E-mail: jiamj@jlu.edu.cn
Supported by:
吉林省科技厅科技发展计划项目(批准号: 20080310)、吉林省教育厅“十一五”科学技术研究项目(批准号: 吉教科合字[2008]第180号)和中国博士后科学基金面上资助.

摘要/Abstract

摘要：

在晶化釜内动态水热合成了MCM-56分子筛, 采用过氧化氢回流处理方法脱除模板剂, 获得了高比表面积分子筛MCM-56[MCM-56(H₂O₂)]. 采用XRD, N₂气吸附-脱附, NH₃-TPD和FTIR等对其结构和酸性进行表征, 考察了HMCM-56(H₂O₂)分子筛在苯与丙烯液相烷基化合成异丙苯中的催化性能. 研究结果表明, 过氧化氢回流处理能够有效去除模板剂. 与焙烧去除模板剂的HMCM-56(C)相比, HMCM-56(H₂O₂)分子筛的BET比表面积达到563 m²/g, 外表面积提高近2倍. 酸性表征说明, 与HMCM-56(C)相比, HMCM-56(H₂O₂)的总酸量较高而酸强度分布不变. 在苯与丙烯液相烷基化反应中, HMCM-56(H₂O₂)分子筛表现出更好的低温活性和更高的异丙苯选择性.

关键词: MCM-56分子筛; 烷基化; 异丙苯; 过氧化氢

Abstract:

MCM-56 zeolite was prepared by hydrothermally dynamic method. The as-made MCM-56 was detemplated by treating with a 30%H₂O₂ solution to obtain MCM-56(H₂O₂) zeolite instead of being treated with high-temperature calcination. The structure and acid properties of samples were studied by means of XRD, N₂ adsorption-desorption, NH₃-TPD and FTIR. The BET surface area of MCM-56(H₂O₂) can be improved significantly by hydrogen peroxide detemplation. A higher external surface area of 301 cm²/g was obtained for HMCM-56(H₂O₂) compared with 134 cm²/g for HMCM-56(C). The amount of acid sites has been increased by hydrogen peroxide treatment, while the acid strength has not been modified. Both the HMCM-56 zeolite detemplated by H₂O₂ and by calcination were used in benzene alkylation with propylene in liquid phase. Under our operation condition, HMCM-56(H₂O₂) shows a relative high activity and selectivity to cumene than HMCM-56(C), especially under a relative low reaction temperature and benzene-to-propylene molar ratio.

Key words: MCM-56 molecular sieve; Alkylation; Cumene; Hydrogen peroxide

TrendMD:

张钰, 赵飞, 李正, 赵胤, 邓广金, 邢海军, 贾明君, 张文祥, 吴通好. MCM-56分子筛催化苯与丙烯液相烷基化反应性能. 高等学校化学学报, 2009, 30(7): 1380.

ZHANG Yu, ZHAO Fei, LI Zheng, ZHAO Yin, DENG Guang-Jin, XING Hai-Jun, ....... Catalytic Performance of MCM-56 Molecular Sieve for Benzene Alkylation with Propylene. Chem. J. Chinese Universities, 2009, 30(7): 1380.