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Catalytic oxidation of thiophenes and thioethers with hydrogen peroxide in the presence of W-containing layered double hydroxides

Paper ID Volume ID Publish Year Pages File Format Full-Text
44582 46042 2006 8 PDF Available
Title
Catalytic oxidation of thiophenes and thioethers with hydrogen peroxide in the presence of W-containing layered double hydroxides
Abstract

Layered double hydroxides (LDH) with Mg2+ and Al3+ cations in the brucite-like layer and W-containing anions in the interlayer have been prepared by direct ion exchange of a MgAl-NO3 LDH precursor with tungstate anions. The W-containing catalysts have been characterised by elemental chemical analysis, powder X-ray diffraction, Raman and UV-DR spectroscopies, thermogravimetric analysis and nitrogen adsorption. The results indicate the presence of both WO42− and W7O246− anions in the interlayer gallery. The catalytic oxidation of organic sulfides and thiophene derivatives using hydrogen peroxide as oxidizing agent, in the presence of W-containing layered double hydroxide as catalyst, was investigated using various organic solvents miscible with water. It was found that W-containing LDHs are active catalysts promoting the fast oxidation of sulfur containing organic compounds with 30% H2O2 under very mild reaction conditions, but the catalytic activity depends on the nature of the W-containing anions. Other factors, like as the structure of the sulfur-containing organic compounds, the reaction temperature and solvent also influence the catalytic conversion.

Keywords
Layered double hydroxide; Tungsten; Oxidation; Hydrogen peroxide; Dibenzothiophene; Thioethers
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Catalytic oxidation of thiophenes and thioethers with hydrogen peroxide in the presence of W-containing layered double hydroxides
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 313, Issue 2, 4 October 2006, Pages 200–207
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
Online Support
Any Questions? feel free to contact us