METHOD FOR AFTER-TREATMENT OF POLYOLEFIN

摘要

FIELD: chemistry. ^ SUBSTANCE: method involves (1) bringing polyolefin from a polymerisation reactor into contact with a countercurrent of saturated steam in order to steam gases from said polyolefin and form condensed steam on particles of said polyolefin; (2) drying polyolefin particles with a countercurrent of dry inert gas while keeping polyolefin particles in fluidisation conditions through said stream of dry inert gas. Polyolefin cools due to evaporation of said condensed steam. The dwell time of said polyolefin at step (1) is equal to 10-45 minutes. ^ EFFECT: efficient deactivation of catalyst components and removal of unreacted monomers and heavy hydrocarbons from polyolefin powder from a polymerisation reactor. ^ 13 cl, 5 dwg, 1 tbl, 3 ex