催化学报

催化学报 ›› 2008, Vol. 29 ›› Issue (10): 1015-1020.

• 研究论文 • 上一篇    下一篇

H-MCM-22和H-MCM-36分子筛对苯与异丙醇烷基化反应的催化性能

张祚望1,张钰2,王振旅1,邢海军1,贾明君1,吴通好1,张文祥1   

  1. 1 吉林大学化学学院吉林省表面与界面化学重点实验室, 吉林长春 130012; 2 吉林化工学院化工系, 吉林吉林 132022
  • 收稿日期:2008-10-25 出版日期:2008-10-25 发布日期:2008-10-25

Catalytic Performance of H-MCM-22 and H-MCM-36 Zeolites for Alkylation of Benzene with Isopropanol

ZHANG Zuowang1, ZHANG Yu2, WANG Zhenlü1*, XING Haijun1, JIA Mingjun1, WU Tonghao1, ZHANG Wenxiang1*   

  1. 1 Key Laboratory of Surface and Interface Chemistry of Jilin Province, College of Chemistry, Jilin University, Changchun 130012, Jilin, China; 2 Department of Chemical Engineering, Jilin Institute of Chemical Technology, Jilin 132022, Jilin, China
  • Received:2008-10-25 Online:2008-10-25 Published:2008-10-25

PDF

974

被引次数

25

摘要： 由同一前驱体合成了H-MCM-22和H-MCM-36分子筛. 采用X射线衍射、N2吸附、程序升温脱附和红外光谱等方法,结合不同的表面后处理手段,研究了分子筛的结构和表面酸性. 结果表明, H-MCM-22的B酸中心主要分布在内表面, H-MCM-36的B酸中心主要分布在外表面. H-MCM-36的总B酸量小于H-MCM-22, 但其外表面B酸量相对较大. 在苯与异丙醇的烷基化反应中,两个分子筛都表现出较为优异的催化性能. 与H-MCM-22相比, H-MCM-36具有更高的反应活性和稳定性,对主产物异丙苯具有更好的选择性. 结合各种表征结果表明,两个分子筛的外表面B酸中心是苯与异丙醇烷基化反应的主要活性中心.

关键词: H-MCM-22分子筛, H-MCM-36分子筛, 烷基化, 异丙苯

Abstract: H-MCM-22 and H-MCM-36, which were synthesized from the same precursor, are active catalysts for the alkylation of benzene with isopropanol. Compared with H-MCM-22, H-MCM-36 shows higher activity and selectivity for cumene, which is due to the fact that H-MCM-36 possesses more accessible Brnsted acid site s than H-MCM-22.

Key words: H-MCM-22 zeolite, H-MCM-36 zeolite, alkylation, cumene