Improved performance of nano-size H-BEA zeolite catalysts for the Friedel-Crafts acetylation of anisole by acetic anhydride

被引：43

作者：

Derouane, EG

Schmidt, I

Lachas, H

Christensen, CJH

机构：

[1] Haldor Topsoe AS Res Labs, DK-2800 Lyngby, Denmark

[2] Univ Liverpool, Leverhulme Ctr Innovat Catalysis, Dept Chem, Liverpool L69 7ZD, Merseyside, England

来源：

CATALYSIS LETTERS | 2004年 / 95卷 / 1-2期

关键词：

zeolite; H-BEA; particle size; acid catalysis; Friedel-Crafts; acetylation; anisole; nanotechnology;

D O I：

10.1023/B:CATL.0000023715.41857.56

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Nano-size zeolite H-BEA (n-H-BEA) prepared by "confined space synthesis'' (CSS) within the pores of a carbon black matrix shows improved activity without loss in para-selectivity for the Friedel-Crafts acetylation of anisole by acetic anhydride. The turnover frequency (TOF) of n-H-BEA exceeds that of a conventional H-BEA catalyst of similar aluminum and thus acid site content by a factor of about three at intermediate conversion. The latter observation is attributed to enhanced access and better utilization of the whole zeolite intracrystalline volume by the reactants as well as to the easier desorption of the acetylated product, p-methoxyacetophenone.

引用

页码：13 / 17

页数：5