| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing an aromatic polyether by recovering and reusing a reaction solvent, the method preventing fluctuation in the molecular weight of the polyether by each reaction. SOLUTION: The method for producing an aromatic polyether comprises: obtaining a reaction mixture containing byproduct salts, a reaction solvent and an aromatic polyether by a polycondensation reaction of a divalent phenolic compound and a dihalogenodiphenyl compound in the presence of a reaction solvent and an alkali metal compound; cleaning and removing the byproduct salts from the reaction mixture by use of water; extracting and removing the reaction solvent by use of a purification solvent; distilling and removing the purification solvent from the extracted solution to obtain the reaction solvent; and reusing the reaction solvent for the polycondensation reaction. The content of the phenolic hydroxyl groups and halogen groups in the reaction solvent to be reused is measured, and the amount of the divalent phenolic compound and/or the dihalogenodiphenyl compound to be supplied to the polycondensation reaction is controlled based on the measured content. COPYRIGHT: (C)2011,JPO&INPIT
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