Method to recover poly(arylene sulfide)s with vaporized liquids

Details Method to recover poly(arylene sulfide)s with vaporized liquids Method to recover poly(arylene sulfide)s with vaporized liquids

C - Chemistry, Metallurgy

08

G

402/319

C08G 75/02 (2006.01)

Patent

CA 1336345

A method is provided for recovering particulate crystalline poly(arylene sulfide) from a polymerization reaction resulting in a liquid reaction mixture, comprising a liquid-phase poly(arylene sulfide), a polar organic solvent, and water. The liquid reaction mixture is contacted by an amount of a vaporized phase separation agent at least sufficient to effect a phase separation of the liquid-phase poly(arylene sulfide) component from the polar organic solvent component. The vaporized separation agent comprises a vaporized liquid which, when in its liquid-phase, is characterized as (1) soluble in said polar organic solvent, (2) a nonsolvent for poly(arylene sulfide), and (3) able to effect a phase separation of the liquid-phase polymer from the polar organic solvent. A subsequent reduction in the temperature of the liquid reaction mixture produces a reaction mixture slurry comprising a particulate poly(arylene sulfide). Also provided is a method for recovering particulate crystalline poly(arylene sulfide) from a polymerization reaction resulting in a reaction mixture slurry comprising a particulate poly(arylene sulfide), a polar organic solvent, and water, wherein the particulate poly(arylene sulfide) is liquified resulting in a liquid reaction mixture. The liquid reaction mixture is contacted by the vaporized phase separating agent as described above. A subsequent reduction in temperature of the liquid reaction mixture produces a reaction mixture slurry comprising a particulate poly(arylene sulfide).

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