Process for manufacturing polyarylene sulfide

Details Process for manufacturing polyarylene sulfide Process for manufacturing polyarylene sulfide

1994-12-16

1997-06-03

Sweet, Mark D.

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

Synthetic resins

From sulfur-containing reactant

528387, C08G 7500

Patent

active

056355874

ABSTRACT:
A process for efficiently manufacturing high purity polyarylene sulfide. The process comprises feeding a liquid or gaseous sulfur compound (e.g. hydrogen sulfide) to a mixture comprising lithium hydroxide and a non-lithium hydroxide solid compound (e.g. alkali metal chloride or alkaline earth metal chloride) in a non-protonic organic solvent (e.g. N-methyl-2-pyrrolidone), separating the alkali metal chloride or alkaline earth metal chloride, adjusting the sulfur content of the reaction mixture, feeding a dihalogeno aromatic compound e.g. p-dichlorobenzene) to effect a polycondensation reaction, and adding of an alkali metal hydroxide (e.g. sodium hydroxide) to recover lithium ion.

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Patent Abstracts of Japan, vol. 11, No. 106 (C-414), Apr. 3, 1987, JP-61-254623, Nov. 12, 1986.

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