METHOD FOR PREPARING ALKYLENE CARBONATE

摘要

PURPOSE: A method for preparing alkylene carbonate is provided which can synthesize high yield of alkylene carbonate under unstringent condition by using a catalyst comprising manganese halide compounds and alkaline metal halide. The catalyst system has a high catalytic activity, and is easy to separate from a product because it consists of simple inorganic salts. CONSTITUTION: The alkaline carbonate of formula (1) is prepared by reacting alkylene oxide with carbon dioxide using the catalyst system consisting of one or more alkaline metal halides selected from MX (wherein, M=alkaline metal and X=Cl, Br or I) and one or more manganese halide compounds selected from MnY2 (wherein, Y=Cl, Br or I), wherein R1 and R2 are independently hydrogen or C1-C4 alkyl. The alkaline metal M is Na or K. The conditions are as follows: 90-170deg.C of a reaction temperature and 10-100 atm of an air pressure.