Patent ID: 7745568
Filing Date: 2010-06-29
Classification: B01J,C08F

Abstract:
1. A method for the recovery of a slurry of polymer solids from a polymerization reactor comprising: recovering a slurry comprising polymer solids in a liquid medium from a loop reactor through a settling leg via a discharge valve; passing the slurry from the loop reactor to a flash vessel; reducing a pressure of the slurry from a first pressure to a second pressure within the flash vessel to vaporize the liquid medium and form vapor; removing at least a portion of the vapor from the flash vessel to form a concentrated slurry; passing the concentrated slurry from the flash vessel to a transfer vessel; measuring a level of polymer solids within the flash vessel; continuously withdrawing an amount of polymer solids from the transfer vessel and passing the amount of polymer solids from the transfer vessel to a purge vessel, the amount adapted to maintain the level of polymer solids within the flash vessel at a predetermined level; removing remaining liquid from the polymer solids within the purge vessel; and recovering the polymer solids from the purge vessel.