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Poly (4-vinylpyridine) catalyzed isomerization of maleic acid to fumaric acid

Paper ID Volume ID Publish Year Pages File Format Full-Text
39661 45830 2014 6 PDF Available
Title
Poly (4-vinylpyridine) catalyzed isomerization of maleic acid to fumaric acid
Abstract

•PVP resin is used for the first time to catalyze the isomerization of maleic acid.•The optimized pH (1.5) was determined by the degree of ionization of maleic acid.•Second-order kinetic model fitted better than the first one in the overall reaction.•The apparent activation energy calculated for the reaction was 226.06 kJ/mol.•The regenerated P4VP resin can recover catalytic activity without any loss.

Fumaric acid is an important industrial intermediate compound that is mostly produced by isomerization of maleic acid under the catalysis of thiourea. In this study, a solid catalyst, poly (4-vinylpyridine) resin, was firstly used instead of thiourea for the catalytic isomerization of maleic acid because of its ease of separation and reusability. A high isomerization conversion rate of 86% was obtained for 100 mL of 200 mg/L maleic acid solution with resin dosage of 0.1 g under 353 K. This high isomerization conversion was due to the high nucleophilicity of PVP molecules. The optimum pH of 1.5 was determined by the degree of ionization of maleic acid. In the kinetics study, the conversion of maleic acid exhibited a second-order kinetic equation with apparent activation energy of 226.06 kJ/mol. Furthermore, the regenerated resin demonstrated no loss of catalytic activity. The excellent catalytic performance and high recyclability suggest that PVP resin has promising application in the isomerization of maleic acid to fumaric acid.

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Keywords
Isomerization; Poly (4-vinylpyridine) resin; Maleic acid; Fumaric acid
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Poly (4-vinylpyridine) catalyzed isomerization of maleic acid to fumaric acid
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 484, 22 August 2014, Pages 148–153
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