A highly ortho-selective TiO2 catalyst for the methylation of phenol

被引：30

作者：

Gandhe, AR ^{[1
]}

Fernandes, JB ^{[1
]}

机构：

[1] Goa Univ, Dept Chem, Goa 403206, India

来源：

CATALYSIS COMMUNICATIONS | 2004年 / 5卷 / 02期

关键词：

alkylation; phenol; methanol; TiO2; basic sites;

D O I：

10.1016/j.catcom.2003.11.017

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 investigation describes alkylation of phenol with methanol over an active rutile TiO2 catalyst in relation to a commercial rutile form. The catalysts were characterized by XRD, surface areas and temperature programmed desorption studies with NH3 and CO2 as probe molecules. Alkylation reactions were carried out in the temperature range 250-480 degreesC to investigate the conditions that would favour the formation of ortho products viz. o-cresol and 2,6-xylenol. The synthesized rutile sample was more active than the commercial sample under identical conditions of temperature, WHSV and molar ratio of reactants. It showed 100% ortho selectivity at 480 degreesC. In comparison the commercial rutile gave mixed selectivity. The selectivity profiles of the catalysts are explained on the basis of their acid-base characteristics. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：89 / 94

页数：6

共 21 条

[1] ALKYLATION OF PHENOL WITH METHANOL OVER MN3O4 [J].