| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method for continuously recovering a reaction solvent in producing an aromatic polyether, with which when a reaction solvent solution separated from a reaction product by using a low-boiling solvent is distilled and the low-boiling solvent is distilled away and the reaction solvent is recovered, reduction in heat efficiency of a heat exchanger used for the heating is controlled and the reaction solvent is continuously recovered for a longer period of time. <P>SOLUTION: In producing an aromatic polyether by polycondensing a dihydric phenol compound with a dihalogenodiphenyl compound in a reaction solvent in the presence of an alkali metal compound, the reaction solvent solution separated from the reaction product by using the low-boiling solvent is distilled, the low-boiling solvent is distilled away and the reaction solvent is recovered. The method for recovering the reaction solvent comprises adding water to the reaction solvent solution and distilling the solution. <P>COPYRIGHT: (C)2007,JPO&INPIT |
