fulltext.study @t Gmail

Epoxidation of jatropha oil using heterogeneous catalysts suitable for the Prileschajew reaction: Acidic resins and immobilized lipase

Paper ID Volume ID Publish Year Pages File Format Full-Text
41473 45890 2011 6 PDF Available
Title
Epoxidation of jatropha oil using heterogeneous catalysts suitable for the Prileschajew reaction: Acidic resins and immobilized lipase
Abstract

Sulphonated polystyrene resins, Nafion-silica and immobilized lipase were used as heterogeneous catalysts for the epoxidation of jatropha oil. Immobilized lipase showed ca. 100% conversion and 100% epoxide selectivity at 24 h. However, this catalyst cannot be reused because it completely deactivates after one use. For the selective epoxidation of vegetable oils with percarboxylic acids the most crucial feature to prevent the formation of glycols is to minimize the exposure of the epoxide to the acidic sites of the catalyst. This can be achieved using resins with a high level of cross-linking and with low external surface area. Activity can be increased by increasing the strength of the acid sites. Amberlite IR-120 was the best heterogeneous catalysts, yielding ca. 90% conversion and 70% epoxide selectivity, both stable through five re-uses. Dowex 50WX2 afforded the production of glycols with more than 90% selectivity at conversions of ca. 90%.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (31 K)Download as PowerPoint slideResearch highlights▶ Amberlite IR-120 was the best catalyst, yielding 70% epoxide selectivity. ▶ Amberlite IR-120 was stable through five re-uses. ▶ Low-accessible acid sites increase epoxide selectivity. ▶ Highly accessible acid sites increase glycol selectivity. ▶ Epoxidation rate is favored by acid strength.

Keywords
Epoxidation; Vegetable oils; Jatropha; Acidic resins; Lipase
First Page Preview
Epoxidation of jatropha oil using heterogeneous catalysts suitable for the Prileschajew reaction: Acidic resins and immobilized lipase
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
Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 394, Issues 1–2, 28 February 2011, Pages 132–137
Authors
, , ,
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