fulltext.study @t Gmail

Application of a cross-linked Pd–chitosan catalyst in liquid-phase-hydrogenation using molecular hydrogen

Paper ID Volume ID Publish Year Pages File Format Full-Text
40721 45863 2012 8 PDF Available
Title
Application of a cross-linked Pd–chitosan catalyst in liquid-phase-hydrogenation using molecular hydrogen
Abstract

Chitosan was cross-linked with hexamethylendiisocyanate and loaded with Pd which was subsequently reduced with NaBH4. The prepared catalyst was characterized by FT-IR and elemental analysis. The metal content was determined by ICP-MS measurements. Several substrates (cyclohex-2-enone, benzalacetophenone, 1,2-diphenylacetylene, and N-benzylidenaniline) were hydrogenated successfully in ethanol at mild conditions (50 °C, p(H2) ∼6 bar) utilizing a microwave reactor. Reaction parameters like temperature, hydrogen pressure, and the solvent were varied. It was shown that the reduction of the catalyst is crucial for catalytic activity. The catalyst was reused ten times for the hydrogenation of cyclohex-2-enone, without showing a dramatic loss in immobilized metal content. Also the polymeric support material did not show any decomposition.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (77 K)Download as PowerPoint slideHighlights► A Pd-catalyst based on cross-linked chitosan was prepared. ► The reduction of unsaturated carbonyl compounds proceeded with high selectivities. ► Imines and alkynes were hydrogenated rapidly. ► Catalyst was reused for ten times.

Keywords
Biopolymer; Catalysis; Chitosan; Crosslinking; Hydrogenation; Microwaves; Palladium
First Page Preview
Application of a cross-linked Pd–chitosan catalyst in liquid-phase-hydrogenation using molecular hydrogen
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 - Volumes 445–446, 28 November 2012, Pages 231–238
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