| 摘要 |
PROBLEM TO BE SOLVED: To recover a quaternary phosphonium chloride formed in a reaction system by efficiently converting the quaternary phosphonium chloride to a quaternary phosphonium iodide or bromide, and to recycle the iodide or bromide to the reaction system, in a method for producing ethylene glycol or ethylene carbonate by reacting ethylene oxide with water or carbon dioxide in the presence of the quaternary phosphonium iodide or bromide as a catalyst. SOLUTION: This method for producing an alkylene derivative comprises converting the quaternary phosphonium chloride to the iodide or bromide by adding an inorganic iodide or an inorganic bromide to a mixture obtained from the reaction process and containing the quaternary phosphonium chloride and the quaternary phosphonium iodide or bromide, recovering quaternary phosphonium iodide and/or the quaternary phosphonium bromide by depositing the chlorine derived from the quaternary phosphonium chloride as an inorganic chloride, and recycling the recovered quaternary phosphonium iodide or bromide to reaction steps. COPYRIGHT: (C)2005,JPO&NCIPI
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