| abstract |
An industrially useful polyphenylene sulfide resin having a reduced volatile content is obtained from a polyphenylene sulfide oligomer having a weight average molecular weight of 800 to 20,000. At least a granular polyphenylene sulfide resin obtained by heating a mixture containing at least a polyhalogenated aromatic compound, a sulfidizing agent and an organic polar solvent to polymerize a polyphenylene sulfide resin and cooling to 220 ° C. or lower. By removing at least granular polyphenylene sulfide resin, organic polar solvent, water, and alkali metal halide salt from slurry (A) containing polyphenylene sulfide oligomer, organic polar solvent, water, and alkali metal halide salt A method for producing a polyphenylene sulfide resin, wherein the obtained polyphenylene sulfide oligomer having a weight average molecular weight of 800 to 20,000 is thermally oxidized at 150 ° C. to 260 ° C. in a gas phase oxidizing atmosphere. [Selection figure] None |