Document Type

Journal Article

Department/Unit

Department of Chemistry

Title

Low-cost polymer-supported quaternary ammonium salts as high-efficiency catalysts for cycloaddition of CO2 to epoxides

Language

English

Abstract

Polystyrene grafted with quaternary ammonium salts were obtained by direct quaternarization of chloromethylated polystyrene with N,N-dimethylethylamine, N,Ndimethylglycine (denoted as PS-QNS and PS-CQNS, respectively). These two polymer-supported ionic liquids were found to show high catalytic efficiency towards the cycloaddition of CO2 to epoxides. The effects of catalyst amount, reaction temperature, initial CO2 pressure, and reaction time on the yield of cyclic carbonates were investigated systematically. Under the optimal reaction conditions (150 °C, initial CO2 pressure 2.0 MPa and 5 h), propylene carbonate yield and selectivity in the cycloaddition of CO2 to propylene oxide over PS-CQNS were 96.2 and 99.3 % whereas those over PS-QNS were 97.9 and 99.5 %, respectively. It was observed that the reusability of PS-QNS was excellent. From the viewpoint of industrial application, PS-QNS is attractive in terms of catalytic efficiency, cost and simplicity in preparation. © Springer Science+Business Media, LLC 2012.

Keywords

Carbon dioxide, Cyclic carbonate, Epoxide, Polymer-supported quaternary ammonium salts

Publication Date

2012

Source Publication Title

Catalysis Letters

Volume

142

Issue

11

Start Page

1376

End Page

1381

Publisher

Springer Verlag

DOI

10.1007/s10562-012-0909-y

Link to Publisher's Edition

http://dx.doi.org/10.1007/s10562-012-0909-y

ISSN (print)

1011372X

ISSN (electronic)

1572879X

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