Patent ID: 9617387
Date: 2017-04-11
CPC Classifications: B01J,C08G,Y02P

Claim:
1. A method for forming a polyarylene sulfide comprising: reacting an organic amide solvent, alkali metal sulfide, and water to form a reaction mixture that includes a hydrogen sulfide-byproduct and a complex of an alkali metal organic amine carboxylic acid salt and an alkali metal hydrosulfide; separating a fluid stream from the reaction mixture that includes the hydrogen sulfide by-product and contacting the fluid stream with a scrubbing mixture to form a sulfur-containing mixture, the scrubbing mixture including an organic amide solvent and an alkali metal hydroxide; charging the sulfur-containing mixture to the reactor; carrying out a first polymerization reaction during which the complex is reacted with a dihaloaromatic monomer to form a polyarylene sulfide prepolymer; and carrying out a second polymerization reaction during which the polyarylene sulfide prepolymer is reacted with a dihaloaromatic monomer and a sulfur-containing monomer to form the polyarylene sulfide.