Synthesis of cyclic carbonates from epoxides and carbon dioxide using bimetallic aluminum(salen) complexes

Abstract

Over the last six years, highly active catalysts for the synthesis of cyclic carbonates from epoxides and carbon dioxide have been developed.Initial studies showed that bimetallic aluminium(salen) complexes [Al(salen)] 2 O formed active catalysts and kinetic studies allowed the catalytic cycle to be determined.The catalysts could be immobilized on silica, allowing them to be used in a gas phase flow reactor as well as in batch reactors.The compatibility of the catalysts with waste carbon dioxide present in power station flue gas has been investigated and studies to enhance the commercial applicability of the catalysts by reducing the cost of their production carried out.