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Studies on heteropoly acid supported zirconia II. Liquid phase bromination of phenol and various organic substrates

Paper ID Volume ID Publish Year Pages File Format Full-Text
52748 46885 2007 5 PDF Available
Title
Studies on heteropoly acid supported zirconia II. Liquid phase bromination of phenol and various organic substrates
Abstract

Heteropoly acid promoted zirconia sample were prepared by an incipient wetness impregnation method using different types of heteropoly acid. The liquid phase bromination of phenol was carried out using heteropoly acid supported zirconia as catalyst, KBr as brominating agent and hydrogen peroxide as an oxidant in acetic acid medium at room temperature. The reaction proceeds through the formation of Br+ (bromonium ion), which attacks the phenol ring forming different brominated products. Among all the HPAs loaded samples, phosphotungstic acid supported zirconia shows highest catalytic activity with 93% conversion and 81% para selectivity.

Keywords
Bromination; Potassium bromide; Hydrogen peroxide; Para-selectivity; Heteropoly acid and zirconia
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Studies on heteropoly acid supported zirconia II. Liquid phase bromination of phenol and various organic substrates
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 8, Issue 6, June 2007, Pages 889–893
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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