Selective alkylation of catechol with t-butyl alcohol over HY and modified HY zeolites

被引：17

作者：

Anand, R ^{[1
]}

Maheswari, R

Gore, KU

Chumbhale, VR

机构：

[1] Natl Chem Lab, Catalysis Div, Pune 411008, Maharashtra, India

[2] Anna Univ, Dept Chem, Chennai 600025, India

来源：

CATALYSIS COMMUNICATIONS | 2002年 / 3卷 / 08期

关键词：

catechol; t-butyl alcohol; butylation; alkylation; zeolites; steaming; dealumination;

D O I：

10.1016/S1566-7367(02)00136-X

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：

Vapor phase alkylation of catechol with t-butyl alcohol (TBA) has been studied over HY and dealuminated HY zeolites (obtained by controlled steaming) in the temperature range 120-200 degreesC. The predominantly formed product over these catalysts is 4-t-butylcatechol (4-TBC) with more than 86% selectivity, the minor products being 3-t-butylcatechol (3-TBC) and 3,5-di-t-butylcatechol (3,5-DTBC). Moderately steam-treated HY zeolites (steamed at 550 and 700 degreesC) showed marked increase in catechol conversion and 4-TBC yield. The influence of various reaction parameters such as temperature, space velocity and molar ratio of the reactants are discussed. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：321 / 326

页数：6

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