Continuous extraction of polyphenylene sulfide

Details Continuous extraction of polyphenylene sulfide Continuous extraction of polyphenylene sulfide

C - Chemistry, Metallurgy

08

G

402/343

C08G 75/02 (2006.01) B01D 11/02 (2006.01) C08J 11/00 (2006.01)

Patent

CA 1233939

ABSTRACT OF THE DISCLOSURE A method for continuously extracting water soluble impurities from particulate arylene sulfide polymers in which a slurry of water and polymer containing from about 3 to about 30 percent by weight polymer is raised to a temperature in the range of about 250° F to about 420°F by continuous transfer of slurry in indirect contact with hot heat exchange medium followed by continuous separation of polymer from the water. In a preferred embodiment, the slurry is cooled before separation of polymer from the water and a closed cycle of heat exchange medium is used at least partially to heat and at least partially to cool the slurry during the process.

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