| 摘要 |
In a process for producing poly(phenylene sulfide), in which an alkali metal sulfide is reacted with a dihalo-aromatic compound in an organic amide solvent, the reaction is conducted through the following Steps 1 and 2, thereby efficiently providing granular, high-molecular weight poly(phenylene sulfide) having excellent whiteness in a short period of time and at a high yield. Step 1: a step comprising reacting the alkali metal sulfide with the dihalo-aromatic compound within a temperature range of 170 DEG -270 DEG C. in the organic amide solvent containing water in a proportion of 0.5-2.0 moles per mole of the alkali metal sulfide charged while raising the reaction temperature at an average heating rate of 0.1 DEG -1 DEG C./min in at least a temperature range of from 220 DEG C. to 240 DEG C., so as to give a conversion of the dihalo-aromatic compound of 70-98 mol %, thereby forming a: prepolymer of poly(phenylene sulfide); and Step 2: a step comprising adding water to the reaction system at a temperature of at least 235 DEG C. in such a manner that water is present in a proportion of 2.1-10 moles per mole of the alkali metal sulfide charged, and continuing the reaction for 0.5-10 hours within a temperature range of 245 DEG -290 DEG C., thereby converting the prepolymer to high-molecular weight poly(phenylene sulfide).
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