Method for removing hydrocarbons from polymer slurries

Details Method for removing hydrocarbons from polymer slurries Method for removing hydrocarbons from polymer slurries

1991-08-02

1993-05-04

Dawson, Robert A.

Liquid purification or separation

Processes

Separating

210805, 210806, 528501, 528503, C08F 600

Patent

active

052079295

ABSTRACT:
Methods and apparatus for the removal of hydrocarbons from polymer slurries are disclosed. The invention includes feeding a hydrocarbon-containing polymer slurry to a flash tank to flash a portion of the hydrocarbon from the slurry. A fraction of the residual slurry is circulated through a heating means and recirculated back to the flash tank to flash additional hydrocarbon from the slurry. The invention is applicable to remove isobutane solvent from an aqueous polyethylene slurry. It is also applicable to the removal of other hydrocarbons, including solvents, monomer and comonomer from polymer slurries.

REFERENCES:
patent: 3285899 (1966-10-01), Houser et al.
patent: 4126743 (1978-11-01), Shiomura et al.
patent: 4499263 (1985-02-01), Messura et al.
patent: 4737280 (1988-04-01), Hanson
pick heaters, Inc., P.O. Box 516, West Bend, Wis., advertisement.

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