Preparation of zinc catalysts (Zn/PS-IL[X], X = Br, Cl-, BF4-, and PF6-) supported on imidazolium-styrene copolymers, as well as their catalytic use for the solvent-free synthesis of styrene carbonate from CO2 and styrene Oxide, are described. Among the catalysts examined. Zn/PS-IL[Br] was proved to be the most efficient. When used in a homogeneous System during the reaction Process, Zn/PS-IL[Br] gave a 97.5% yield of product with a TOF value that can be LIP to about 3800 h(-1). Due to its immiscibility with ethanol, Zn/PS-IL[Br] can be separated like a heterogeneous catalyst through solvent precipitation, and reused at least three times for the reaction Without significant loss of activity. (C) 2009 Elsevier B.V. All rights reserved.