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Efficient cleavage of cumene hydroperoxide over HUSY zeolites: The role of Brønsted acidity

Paper ID Volume ID Publish Year Pages File Format Full-Text
43400 45968 2008 6 PDF Available
Title
Efficient cleavage of cumene hydroperoxide over HUSY zeolites: The role of Brønsted acidity
Abstract

The cleavage of cumene hydroperoxide in the presence of H-form USY zeolites to form phenol and acetone has been examined. For comparison, the same reaction, catalyzed by Y-, ZSM-5, β-zeolites, as well as sulfuric and heteropolyacids is performed. As appeared, HUSY zeolites of high Si/Al ratio (15 and 40) are sufficiently active catalysts, and their efficiency is comparable to that of sulfuric acid. Such outstanding catalytic performance of HUSY should be attributed to combination of favourable porous topology, sorption properties and relatively strong acidity of the internal surface. The acid strength of HY and HUSY zeolites is roughly estimated in terms of H/D exchange between deuterated acetone and water over the solid acid, while their sorption properties are estimated based on H2O-TPD measurements.

Graphical abstractAn efficient cleavage of cumene hydroperoxide to form phenol and acetone was achieved by using HUSY zeolites of high Si/Al ratio. The efficiency of this catalyst was comparable to that of sulfuric acid.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Cumene hydroperoxide; Cleavage; Phenol; HUSY zeolites; Acidity; Proton deuterium exchange
First Page Preview
Efficient cleavage of cumene hydroperoxide over HUSY zeolites: The role of Brønsted acidity
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 336, Issues 1–2, 1 March 2008, Pages 29–34
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis