Catalyst composition for cyclic carbonate production from CO2 and epoxides

A process for cyclic carbonate production from CO2 and epoxides, comprising the contact of CO2 and epoxides to the catalyst composition at the temperature in the range of 50 to 180° C., wherein said catalyst composition comprises:

• a) the metal complex as shown in structure (I):
• wherein,
• M represents transition metal atom selected from the group consisting of chromium, cobalt and iron;
• R1, R2, and R3 represent independent group selected from hydrogen atom, halogen atom, alkyl group, alkenyl group, alkynyl group, alkoxy group, amine group, phenyl group, benzyl group, cyclic hydrocarbon group comprising hetero atom, perfluoroalkyl group, or nitro group;
• R4 represents group selected from alkylene group, cycloalkylene group, or phenylene group;
• X represents group selected from halogen atom, acetate group, or triflate group;
• and
• b) the organic compound as the co-catalyst is selected from the group consisting of 4-dimethylaminopyridine (DMAP), tetrabutylammonium bromide (TBAB), tetrabutylammonium chloride (TBAC), tetrabutylammonium iodide (TBAI), imidazolium bromide, imidazolium chloride, imidazolium iodide, bis(triphenylphosphine) iminium bromide, bis(triphenylphosphine) iminium chloride, bis(triphenylphosphine) iminium iodide, and mixtures thereof.