Process for Production of Poly(Arylene Sulfide)
AssigneeChevron Phillips Chemical Company LP
InventorsJeffrey S. Fodor, R. Shawn Childress, Kent E. Mitchell, Kendall M. Hurst
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Abstract
A process for producing a poly(arylene sulfide) polymer comprising (a) polymerizing reactants in a reaction vessel to produce a poly(arylene sulfide) reaction mixture, (b) processing the poly(arylene sulfide) reaction mixture to obtain a poly(arylene sulfide) polymer and a by-product slurry, (c) removing (e.g., evaporating) at least a portion of the by-product slurry to yield salt solids particulates, wherein at least a portion of the evaporating is carried out while simultaneously sizing the salt solids particulates to a desired size.
Claims20
A process for producing a poly(arylene sulfide) polymer comprising:
- (a) polymerizing reactants in a reaction vessel to produce a poly(arylene sulfide) reaction mixture;
- (b) processing the poly(arylene sulfide) reaction mixture to obtain a poly(arylene sulfide) polymer and a by-product slurry;
- (c) evaporating at least a portion of the by-product slurry to yield salt solids particulates, wherein at least a portion of the evaporating is carried out while simultaneously sizing the salt solids particulates to a desired size.
A process for producing a poly(phenylene sulfide) polymer comprising:
- (i) reacting a sulfur source and a dihaloaromatic compound in the presence of N-methyl-2-pyrrolidone to form a poly(phenylene sulfide) reaction mixture;
- (ii) washing the poly(phenylene sulfide) reaction mixture with N-methyl-2-pyrrolidone and/or water to obtain a raw poly(phenylene sulfide) polymer and a first slurry;
- (iii) treating at least a portion of the raw poly(phenylene sulfide) polymer with an aqueous acid solution and/or an aqueous metal cation solution to obtain a treated poly(phenylene sulfide) polymer;
- (iv) drying at least a portion of the raw poly(phenylene sulfide) polymer and/or treated poly(phenylene sulfide) polymer to obtain a dried poly(phenylene sulfide) polymer;
- (v) evaporating a portion of the first slurry to obtain a by-product slurry, wherein the by-product slurry comprises slurry particulates;
- and
- (vi) evaporating at least a portion of the N-methyl-2-pyrrolidone and/or water from the by-product slurry to yield salt solids particulates, wherein at least a portion of the evaporating is carried out while simultaneously sizing the salt solids particulates to a desired size.
A process for recovering N-methyl-2-pyrrolidone during production of poly(phenylene sulfide) polymer, comprising:
- (i) reacting a sulfur source and a dihaloaromatic compound in the presence of N-methyl-2-pyrrolidone to form a poly(phenylene sulfide) reaction mixture;
- (ii) washing the poly(phenylene sulfide) reaction mixture with N-methyl-2-pyrrolidone and/or water to obtain a raw poly(phenylene sulfide) polymer and a first slurry;
- (iii) treating at least a portion of the raw poly(phenylene sulfide) polymer with an aqueous acid solution and/or an aqueous metal cation solution to obtain a treated poly(phenylene sulfide) polymer;
- (iv) drying at least a portion of the raw poly(phenylene sulfide) polymer and/or treated poly(phenylene sulfide) polymer to obtain a dried poly(phenylene sulfide) polymer;
- (v) evaporating a portion of the first slurry to obtain a by-product slurry and a vapor stream, wherein the by-product slurry comprises slurry particulates;
- and
- (vi) evaporating at least a portion of the N-methyl-2-pyrrolidone and/or water from the by-product slurry to yield salt solids particulates and recovered N-methyl-2-pyrrolidone, wherein at least a portion of the evaporating is carried out while simultaneously sizing the salt solids particulates to a desired size, and wherein at least a portion of the recovered N-methyl-2-pyrrolidone is re-used in step (i), step (ii), or both.
Dependencies are inferred from the claim text.