Process for removing hydrocarbons from polymer slurries

Details Process for removing hydrocarbons from polymer slurries Process for removing hydrocarbons from polymer slurries

1992-12-22

1994-05-24

Manoharan, Virginia

Concentrating evaporators

Processes

159 21, 159DIG2, 159DIG3, 159DIG10, 203 88, 210768, 210806, 210807, 528501, B01D 100, B01D 306

Patent

active

053145798

ABSTRACT:
A highly energy efficient process for removing hydrocarbons from polymer slurries is disclosed. The process includes feeding a hydrocarbon-containing polymer slurry to a flash tank to flash a portion of the hydrocarbon from the slurry. Thereafter, the resulting slurry is fed to a fluid bed dryer wherein additional hydrocarbon is stripped from the polymer. Subsequently, the resulting polymer powder is transferred to a powder silo wherein further hydrocarbon is removed from the polymer utilizing a heated purge gas flowing countercurrent to the polymer powder. The polymer output preferably has a low hydrocarbon content, on the order of 100 ppm or less.

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