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Synthesis of paracetamol by liquid phase Beckmann rearrangement of 4-hydroxyacetophenone oxime over H3PO4/Al-MCM-41

Paper ID Volume ID Publish Year Pages File Format Full-Text
51302 46838 2009 7 PDF Available
Title
Synthesis of paracetamol by liquid phase Beckmann rearrangement of 4-hydroxyacetophenone oxime over H3PO4/Al-MCM-41
Abstract

Paracetamol was synthesized via the environmentally benign liquid phase Beckmann rearrangement of 4-hydroxyacetophenone oxime over Al-MCM-41 modified with H3PO4. Al-MCM-41 materials were synthesized using different aluminium sources. Aprotic solvents with a high dielectric constant or high polar nature are preferred for this transformation, acetone being the optimal solvent. The conversion of 4-hydroxyacetophenone oxime to paracetamol increased with the H3PO4 content in the catalysts up to a maximum value for a H3PO4 loading of 30 wt% and decreased for higher loadings. Recovery of the catalysts was also investigated.

Keywords
Paracetamol; 4-hydroxyacetophenone oxime; Beckmann rearrangement; H3PO4/MCM-41 catalysts
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Synthesis of paracetamol by liquid phase Beckmann rearrangement of 4-hydroxyacetophenone oxime over H3PO4/Al-MCM-41
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 10, Issue 11, 10 June 2009, Pages 1486–1492
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
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100% Money Back Guarantee
Full-text PDF Download
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