Production process and washing method of poly(arylene sulfide), and purification process of organic solvent used in washing

摘要

A process for producing a poly(arylene sulfide), comprising the respective steps of a washing step of washing a polymer separated from a reaction mixture containing the polymer formed with an organic solvent, which is arranged after a polymerization step, a purification step of purifying the organic solvent recovered after the washing step to lower the content of an alkaline compound mixed therein, and a step of recycling the purified organic solvent through the washing step of the poly(arylene sulfide).