THE ROLE OF SUPERCRITICAL CARBON DIOXIDE IN THE SYNTHESIS OF ORGANIC CARBONATES

摘要

The pressure effect on the reaction of methanol and carbon dioxide to afford dimethyl carbonate in the presence of n-Bu_2Sn(OCH_3)_2 was studied in the temperature range 373-423 K. Correlations between reaction kinetics and calculated P-T phase diagrams of the binary CO_2-methanol mixture of different compositions show that supercritical monophasic conditions lead to the highest yield and rate.