Patent ID: 7115704
Filing Date: 2006-10-03
Classification: C08G

Abstract:
1. A method for producing a polyarylene sulfide, comprising a step of bringing a low-hydrated alkali metal sulfide containing 0.05 to less than 0.8 mole each of water and an organic amide solvent per mole of the sulfur contained in the alkali metal sulfide, into contact with a dihalogenated aromatic compound in an organic polar solvent for polymerization, wherein the low-hydrated alkali metal sulfide is obtained by a method of eliminating an organic amide solvent and water from a mixture containing at least (a) an alkali metal sulfide, (b) 0.8 to 10 moles of the organic amide solvent and (c) 0.8 to 20 moles of water, respectively, per mole of the sulfur contained in the alkali metal sulfide, to adjust the water content and the organic amide solvent content of the mixture respectively into the range of from 0.05 mole to less than 0.8 mole per mole of the sulfur contained in the alkali metal sulfide.