Liquid phase alkylation of anisole by benzyl alcohol catalyzed on alumina-supported niobia

被引：42
|
作者：
de la Cruz, Marcus H. C.
Abdel-Rehim, Mona A.
Rocha, Angela S.
da Silva, Joao F. C.
Faro, Arnaldo da Costa, Jr.
Lachter, Elizabeth R. [1 ]
机构：
[1] Univ Fed Rio de Janeiro, Inst Quim, Dept Quim Organ, BR-21949900 Rio De Janeiro, Brazil
[2] Univ Fed Rio de Janeiro, Inst Quim, Dept Quim Fis, BR-21949900 Rio De Janeiro, Brazil
来源：
CATALYSIS COMMUNICATIONS | 2007年 / 8卷 / 11期
关键词：
niobic acid; alkylation; friedel-crafts reaction; solid acid catalyst; niobia-alumina;
D O I：
10.1016/j.catcom.2007.01.019
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：
The catalytic activity of Nb2O5, Al2O3 and alumina-supported niobia were evaluated in the alkylation reaction of anisole with benzyl alcohol in liquid phase. Alumina exhibited low activity and poor selectivity for alkylates. In contrast, high activities and selectivities to alkylated products were obtained with the niobia and niobia-alumina. The latter could be re-used after drying at 773 K. The catalysts were characterized by conventional techniques such as XRD, FTIR of adsorbed pyridine and nitrogen physisorption. Alumina presents only Lewis acidity, nevertheless niobium based catalysts present Bronsted and Lewis acid sites. The acidity trends are compatible with the activity patterns. (c) 2007 Elsevier B. V. All rights reserved.
引用
收藏
页码：1650 / 1654
页数：5
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