Method for producing catalyst for cyclic carbonate synthesis

A method for producing a catalyst, comprising:

• obtaining a catalyst precursor having a haloalkyl group or a haloaryl group, by reacting a silane compound having a haloalkyl group or a haloaryl group with a silica gel having an average pore diameter of 3.5 nm to 50 nm, and
• obtaining the catalyst, by reacting the catalyst precursor with a tertiary phosphine, at a temperature of 100-160° C. for 10-50 hours in xylene, wherein the catalyst formed by the reacting has a [halogen]/[phosphorus] molar ratio of 0.8 to 1.5,
• wherein the catalyst has a phosphorus content of 0.25 mmol to 0.6 mmol per 1 g of the catalyst,
• wherein the silane compound has formula (1):
• X—R1—Si(OR2)3 (1)
• wherein R1 represents a linear or branched alkylene group having 2 to 8 carbon atoms, an arylene group, an alkarylene group, an arylenealkylene group or an alkylenearylene group;
• R2 represents an alkyl group having 1 to 4 carbon atoms;
• and X represents a halogen atom, and
• wherein the tertiary phosphine has formula (2):
• wherein R3 to R5 each independently represents an alkyl group having 1 to 8 carbon atoms, an aryl group, an aralkyl group, an alkoxyalkyl group or an alkoxy substituted aryl group.