Process for producing polyarylene sulfide

摘要

There is disclosed a process for producing a polyarylene sulfide (PAS) which comprises reacting a sulfur source with a dihalogenated aromatic compound in the presence of an aprotic organic solvent, characterized in that the process comprises at least one polymerization reaction step wherein a polymer phase as a dispersed phase is in the form of spherical droplets. It is made possible by the continuous polymerization process to discharge the polymer phase and solvent phase from a polymerization vessel at a constant ratio and as a result, to maintain PAS composition (concentration) at a constant level at all times, and thus to provide a continuous PAS production process which is effective for enhancing its molecular weight and stabilizing the same.