Preparing method of dialkyl carbonate

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PURPOSE : A method for preparing dialkyl carbonate is provided to enable the manufacture under the pressure lower than an existing manufacturing method and to improve the yield of dialkyl carbonate.CONSTITUTION : A method for preparing dialkyl carbonate comprises a step for preparing dialkyl carbonate from urea or alkylcarbamate and alkylalcohol using (a) an ionic liquid containing a positive ion capable of hydrogen ions (H+) and a hydrophobic negative ion containing fluorine and (b) a catalyst including at least one kind selected from alkaline earth metal oxide, transition metal oxide, rare earth oxide and hydrotalcite.COPYRIGHT KIPO 2011