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Preparation, characterisation of molybdophosphoric and tungstophosphoric acid intercalated zinc aluminium hydrotalcite-like compounds and their catalytic evaluation towards the oxidative bromination of phenol

Paper ID Volume ID Publish Year Pages File Format Full-Text
52414 46873 2006 7 PDF Available
Title
Preparation, characterisation of molybdophosphoric and tungstophosphoric acid intercalated zinc aluminium hydrotalcite-like compounds and their catalytic evaluation towards the oxidative bromination of phenol
Abstract

Oxybromination of phenol was carried out using an efficient and highly regioselective catalyst that is molybdophosphoric acid (MPA) and tungstophosphoric acid (TPA) intercalated zinc aluminium hydrotalcite-like-compounds (ZAH). The ZAH was prepared by co-precipitation method. The intercalation of MPA and TPA was done following indirect method by taking terephthalic acid intercalated ZAH as the precursor. All the materials were characterized by XRD, FT-IR, BET-surface area and surface acidity. The catalytic activity of these materials towards oxybromination of phenol was studied using KBr as a bromine source and H2O2 as an oxidant. The percentage of conversion was found to be maximum in case of 15 wt% molybdophosphoric acid loaded sample; 82% of phenol conversion with 58% para, 38% ortho and 4% dibromo selectivity.

Keywords
Regioselectivity; Oxybromination of phenol; Co-precipitation method; MPA and TPA intercalated ZAH
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Preparation, characterisation of molybdophosphoric and tungstophosphoric acid intercalated zinc aluminium hydrotalcite-like compounds and their catalytic evaluation towards the oxidative bromination of phenol
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 7, Issue 11, November 2006, Pages 913–919
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
100% Money Back Guarantee
Full-text PDF Download
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Any Questions? feel free to contact us