Patent ID: 7199253
Filing Date: 2007-04-03
Classification: C07D

Abstract:
1. A process for producing an alkylene carbonate, which comprises reacting an alkylene oxide represented by the following formula (1): wherein each of R with carbon dioxide in the presence of a catalyst in a reactor to obtain a reaction mixture in said reactor, wherein said reaction mixture contains an alkylene carbonate represented by the following formula (2): wherein R said reactor communicating with a process-side channel of a heat exchanger through a piping to form a circulation circuit, wherein said heat exchanger has a heat exchange-side channel for flowing therethrough a heat exchange medium having a temperature controlled in a predetermined range and has said process-side channel for flowing therethrough a process liquid which is heat exchanged with said heat exchange medium in association with the process for producing an alkylene carbonate, characterized in that the process further comprises, during or after the reaction, flowing said process liquid through said circulation circuit including the reactor and the process-side channel of the heat exchanger while flowing said heat exchange medium having a temperature of from 140° C. to 200° C. through said heat exchange-side channel of the heat exchanger, thereby maintaining the inner temperature of said process-side channel at a level within the range of from 135° C. to 200° C.