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Supported 12-tungstophosphoricacid: An efficient and selective solid acid catalyst for tert-butylation of phenol and cresols

DSpace at IIT Bombay

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Title Supported 12-tungstophosphoricacid: An efficient and selective solid acid catalyst for tert-butylation of phenol and cresols
 
Creator BHATT, N
SHARMA, P
PATEL, A
SELVAM, P
 
Subject heteropoly compounds
hydrous zirconia
alkylation
liquid
benzene
alcohol
salts
tert-butylation
phenol
cresols
12-tungstophosphoricacid
zirconia
 
Description 12-Tungstophosphoricacid (30%) supported onto zirconia was synthesized by impregnation. The synthesized catalyst was characterized by solid state NMR and XPS in order to study the nature of active species on support surface. The acidity of the catalyst was measured by temperature programmed desorption (TPD) of NH3. Liquid phase alkylation of phenol and cresols with tert-butyl alcohol was carried out using fresh as well as calcined catalyst under mild conditions. The catalysts show high activity in terms of conversion and selectivity for the desired product under mild conditions. The process could be economically viable as the un-reacted phenol could be separated by simple distillation and reused for further reaction. Studies also reveal that the regenerated catalyst could be used for achieving high yield transformation. (C) 2008
 
Publisher ELSEVIER SCIENCE BV
 
Date 2011-07-26T21:45:23Z
2011-12-26T12:55:58Z
2011-12-27T05:43:43Z
2011-07-26T21:45:23Z
2011-12-26T12:55:58Z
2011-12-27T05:43:43Z
2008
 
Type Article
 
Identifier CATALYSIS COMMUNICATIONS, 9(7), 1545-1550
1566-7367
http://dx.doi.org/10.1016/j.catcom.2007.12.027
http://dspace.library.iitb.ac.in/xmlui/handle/10054/7028
http://hdl.handle.net/10054/7028
 
Language en