Method for recovery of solvent used in production of polyarylene

Details Method for recovery of solvent used in production of polyarylene Method for recovery of solvent used in production of polyarylene

1989-10-16

1992-12-01

Bascomb, Jr., Wilbur

Distillation: processes, separatory

Plural distillations performed on same material

One a distillation under positive pressure or vacuum

203 77, 203 80, 203 81, 203 88, 203DIG9, 203DIG19, 528388, 528501, 548555, B01D 306, C08F 610

Patent

active

051677750

ABSTRACT:
The present invention provides a method for the recover of a solvent used in the production of a polyarylene sulfide according to which the deterioration of the solvent is low and the recovery rate is high, wherein a mixed liquid, mainly composed of the solvent used in the production of the polyarylene sulfide, and generated from the process of producing the polyarylene sulfide, is subjected to a flash evaporating operation to separate the mixed liquid into a flashed vapor (A) and a flashed residue (B), and then the flashed vapor is rectified (A).

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Patent Abstracts of Japan, vol. 10, No. 214 (C-362) (2270), Jul 25, 1986 of JP-A-6153324 (Toyo Soda Mfg.) Mar. 17, 1986.
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