Cycloaddition of CO 2 to epoxides catalyzed by carboxyl-functionalized imidazolium-based ionic liquid grafted onto cross-linked polymer

Yuanyuan Zhang, Shuangfeng Yin*, Shenglian Luo, Chak Tong AU

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

89 Citations (Scopus)

Abstract

Carboxyl-functionalized imidazolium-based ionic liquid was grafted onto cross-linked divinylbenzene polymer (PDVB-CEIMBr) for the first time. The catalyst was characterized and used for the cycloaddition of CO 2 to epoxides under relatively mild reaction conditions without any use of cocatalyst and organic solvent. The effects of reaction conditions (temperature, initial CO 2 pressure, and time) and water addition on the yield of cyclic carbonate were investigated systematically. Under optimal conditions (140 °C, initial CO 2 pressure 2.0 MPa and 4 h), propylene carbonate selectivity and yield was 99.8% and 96.1%, respectively. Moreover, the catalyst shows good stability and reusability. A plausible reaction mechanism was proposed for the catalytic reaction. It is suggested that synergetic effect among Brønsted acid COOH, Lewis base Br - and the support facilitates the coupling reaction. From the viewpoint of industrial application, the catalyst is attractive because of its excellent catalytic efficiency.

Original languageEnglish
Pages (from-to)3951-3957
Number of pages7
JournalIndustrial & Engineering Chemistry Research
Volume51
Issue number10
DOIs
Publication statusPublished - 14 Mar 2012

Scopus Subject Areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

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