Friedel-Crafts acylation of anisole over Cr-doped Hβ zeolite

被引：16
作者：
Bai, Guo Yi [1 ]
Dou, Hai Yang [1 ]
De Qiu, Man [1 ]
He, Fei [2 ]
Fan, Xin Xin [1 ]
Ma, Zheng [1 ]
机构：
[1] Hebei Univ, Coll Chem & Environm Sci, Baoding 071002, Hebei, Peoples R China
[2] Tianjin Univ, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China
来源：
RESEARCH ON CHEMICAL INTERMEDIATES | 2010年 / 36卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Acylation; Cr addition; H beta zeolite; Deactivation; AROMATIC-COMPOUNDS; BENZYL ALCOHOL; TOLUENE; DEACTIVATION; BENZOYLATION; ANHYDRIDE; CHLORIDES; CATALYSTS; BENZENE; OXIDES;
D O I：
10.1007/s11164-010-0158-x
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
Cr-doped H beta zeolite is found to have better catalytic performance than H beta zeolite in the Friedel-Crafts acylation of anisole, with acetic anhydride conversion of over 99% and nearly 100% selectivity to furnish para-methoxyacetophenone under the optimized reaction conditions. This is attributed to the increase of weak and moderately strong acid sites, caused by the Cr addition. The formation of carbonaceous materials and their coating of the acid sites are believed to be the reasons for the deactivation of the reused Cr-doped H beta zeolite, as indicated by the Brunauer-Emmett-Teller (BET) method, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and NH3 temperature-programmed desorption (NH3-TPD) measurement results. The catalyst activity can be recovered by a subsequent calcination.
引用
收藏
页码：483 / 490
页数：8
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