Progress in the Heterogeneous Catalytic Cyclization of CO2 with Epoxides Using Immobilized Ionic Liquids

Ionic liquid heterogeneous catalysis has become a new catalytic method for carbon dioxide cycloaddition because of its high catalytic activity, green efficiency, easy separation and recovery. In this paper, the research progress of the cycloaddition reaction of carbon dioxide and epoxy compounds with the ionic liquid solid catalyst supported by silica gel, molecular sieve, organic polymer material, carbon material and metal organic frameworks was reviewed. The structure characteristics and catalytic effects of supported ionic liquid catalysts with different supports were summarized and the prospect of new supported ionic liquid catalysts, such as column aromatic hydrocarbons, was prospected.