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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 28, Number 11
BKCSDE 28(11)
November 20, 2007

Title	Polymer-supported Zinc Tetrahalide Catalysts for the Coupling Reactions of CO₂ and Epoxides
Author	Bora Lee, Nan Hee Ko, Byoung Sung Ahn, Minserk Cheong, Hoon Sik Kim, Je Seung Lee
Keywords	Ionic liquids, Zinc tetrahalide, Ethylene carbonate, Propylene carbonate, Polymer-supported
Abstract	Homogeneous zinc tetrahalide complexes, highly active catalysts for the coupling reactions of alkylene oxide and CO₂ produce alkylene carbonates, were heterogenized due to their tendency to decompose produced alkylene carbonates during the distillation process. Heterogenization of homogeneous zinc tetrahalide complexes was achieved by polymerizing 1-alkyl-3-vinylimidazolium zinc tetrahalides. These polymerized zinc tetrahalide catalysts displayed similar activities to their corresponding monomeric analogues for the coupling reactions of carbon dioxide with ethylene oxide (EO) or propylene oxide (PO) to produce ethylene carbonate (EC) or propylene carbonate (PC). TGA studies showed that the polymer-supported zinc tetrahalide catalysts are thermally stable up to 320 oC. The catalyst recycle test showed that the supported catalysts could be reused over six times. After removal of the polymer-supported catalyst through a simple filtration, EC was able to be isolated without decomposition.
Page	2025 - 2028
Full Text	PDF

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