METHOD FOR REGENERATING CATALYSTS USED IN THE PRODUCTION OF ALKYLENE CARBONATE AND/OR ALKYLENE GLYCOL AND PREPARATION METHOD OF ALKYLENE CARBONATE AND/OR ALKYLENE GLYCOL

摘要

The present invention , the catalyst in the presence of a quaternary phosphonium iodide compound and / or quaternary phosphonium bromide compound under , the results obtained by reacting an alkylene oxide with carbon dioxide , the method comprising: using a thin film evaporator to concentrate ; Relates to a process for the production of an alkylene carbonate and / or alkylene glycol and a reproducing method , and reproducing the catalytic activity of a catalyst comprising a distance that can be used ; and the concentration step is reacted with iodide salt and / or a bromide salt and water . ;