| abstract |
(57) [Summary] (Modified) [Constitution] As a catalyst, Mg containing a metal element other than Mg in an atomic ratio of Mg to a metal element other than Mg in the range of 1: 0.001 to 1: 0.05. In the presence of a complex oxide with a metal element other than Mg, the alkylene carbonate (1) and the alcohol (2) are transesterified to produce a dialkyl carbonate (3). (In the formula, R 1 , R 2 , R 3 and R 4 represent H, an alkyl group, an alkenyl group, an aryl group, a cycloalkyl group, an alkoxyalkyl group or an alkoxy group, and R 5 is an alkyl group having 1 to 20 carbon atoms. , An alkenyl group, an arylalkyl group, a cycloalkyl group or an alkoxyalkyl group) [Effect] The catalytic activity is excellent, the transesterification reaction proceeds rapidly, and the catalyst can be easily separated after the reaction to separate the dialkyl carbonate. Purification can be performed efficiently. |