Toray Industries, Inc.

Junji Ishibashi

Koji Yamauchi

Tomoyuki Odashima

Naoto Kumagai

Syunsuke Horiuchi

There is provided a production method of a cyclic polyarylene sulfide by heating and reacting a raw material mixture (a) including at least a sulfidizing agent, a dihalogenated aromatic compound and an organic polar solvent. The production method continually performs each of an operation (A) of supplying the raw material mixture (a) to a reaction mixture (b) in a reaction vessel which includes a reaction product obtained from the raw material mixture (a), an operation (B) of withdrawing part of the reaction mixture (b) from the reaction vessel, and an operation (C) of heating the reaction vessel.

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Tokai, Japan

Junji Ishibashi