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| Regular issue | Vol 85, No. 2, 2012, pp.281-298
Published online, 21st December, 2011
DOI: 10.3987/REV-11-723
Role of Ionic Liquids as Supports of Catalysts

Hisahiro Hagiwara*

*Graduate School of Science and Technology, Niigata University, 8050, 2 no-cho, Ikarashi, Niigata 950-2181, Japan

Abstract

Chemically stable and independent properties of an ionic liquid has been utilized as a liquid support for immobilization of homogeneous or heterogeneous catalysts by simply dissolving or suspending in an ionic liquid. After triturating products with molecular solvent, the catalyst, which was kept in the ionic liquid, is separated, recovered and used repeatedly. Covalent bonding of catalyst residue on an ionic liquid is an alternative method of immobilization. Confine of homogeneous catalyst with the aid of an ionic liquid in pores of amorphous solid (SILPC protocol) is simple and efficient way of immobilization for higher activity, recycle use, easy handling and low cost. Recent representative developments in these areas are reviewed.