Recovery of cyclic arylene sulfide oligomers

Details Recovery of cyclic arylene sulfide oligomers Recovery of cyclic arylene sulfide oligomers

1993-12-30

1995-08-08

Marquis, Melvyn I.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

From sulfur-containing reactant

528391, 528492, 528493, 528499, 562432, 564162, 564430, 568 58, C08G 7514

Patent

active

054400090

ABSTRACT:
A method for recovering cyclic oligomers from a poly(arylene sulfide) polymer or poly(arylene sulfide) polymerization reaction mixture is provided in which the cyclic oligomers are maintained in a solution comprising a suitable solvent and the cyclic oligomers; then the solution is contacted with water to cause the formation of a suspension; then the suspension is acidified to cause the flocculation of cyclic oligomers which can then be more easily recovered.

REFERENCES:
patent: 4730034 (1988-03-01), Nesheiwat et al.
patent: 4801664 (1989-01-01), Nesheiwat et al.

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