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Issue 4, 2012
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Hybrid sol–gel double metal cyanide catalysts for the copolymerisation of styrene oxide and CO2

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Abstract

Hybrid sol–gel catalysts of zinc hexacyanocobaltate and SiO2 were prepared by co-precipitation of the double metal cyanide with silica. Hybrid catalysts prepared at moderately acidic conditions showed the best performance with respect to activity, selectivity and stability. The hybrid sol–gel materials displayed high catalytic activity for the copolymerisation of styrene oxide and carbon dioxide (up to 650 molSO (molZn h)−1) and high productivity (575 gPolymer gCatalyst−1). They also displayed good selectivity to the polymeric product (80–87%), while only little cyclic styrene carbonate was formed as side product. A detailed electron microscopy study of the hybrid sol–gel materials showed that the active phase consisted of thin platelets containing the metals in a molar ratio nZn/nCo = 2.1, whereby the double metal cyanide was closely associated with silica.

Graphical abstract: Hybrid sol–gel double metal cyanide catalysts for the copolymerisation of styrene oxide and CO2

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Publication details

The article was received on 20 Nov 2011, accepted on 30 Jan 2012 and first published on 06 Mar 2012


Article type: Paper
DOI: 10.1039/C2GC16485J
Citation: Green Chem., 2012,14, 1168-1177

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    Hybrid sol–gel double metal cyanide catalysts for the copolymerisation of styrene oxide and CO2

    Y. Dienes, W. Leitner, M. G. J. Müller, W. K. Offermans, T. Reier, A. Reinholdt, T. E. Weirich and T. E. Müller, Green Chem., 2012, 14, 1168
    DOI: 10.1039/C2GC16485J

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