Toluene methylation on AlPO4-Al2O3 catalysts (5-15 wt.% Al2O3)

被引：11

作者：

Bautista, FM ^{[1
]}

Campelo, JM ^{[1
]}

Garcia, A ^{[1
]}

Luna, D ^{[1
]}

Marinas, JM ^{[1
]}

Romero, AA ^{[1
]}

机构：

[1] UNIV CORDOBA,DEPT ORGAN CHEM,E-14004 CORDOBA,SPAIN

来源：

REACTION KINETICS AND CATALYSIS LETTERS | 1996年 / 57卷 / 01期

关键词：

toluene; methylation;

D O I：

10.1007/BF02076121

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 alkylation of toluene with methanol over AlPO4-Al2O3 (5-15 wt% Al2O3) catalysts produces a mixture of xylenes (XYL) although trimethylbenzenes (TMB) were also found. The TMB selectivity increased with temperature at the expense of XYL selectivity. Isomer distribution was approximately 48, 23 and 27 mol% for o-, m- and p-XYL, and 74, 26 and 0 mol% for 1,2,3-, 1,2,4- and 1,3,5-TMB, both quite different from the equilibrium isomer composition. The catalytic activity increased with alumina content, however, it decreased on increasing the calcination temperature in the 923-1273 K range. Good correlations between catalytic activity and the increase in acidic properties with Al2O3 loading (as determined by base chemisorption, in the gas phase, versus pyridine and 2,6-dimethylpyridine) have been obtained.

引用

页码：61 / 70

页数：10

共 15 条

[1]

ABABI V, 1990, REV ROUM CHIM, V35, P253

[2] A GAS CHROMATOGRAPHIC STUDY OF THE CATALYTIC ISOMERIZATION OF CYCLOPROPANE [J].