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
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD AND DEVICE FOR DRYING OF POLYMER | 2007 |
|
RU2462673C2 |
| POLYOLEFIN STEAM TREATMENT | 2009 |
|
RU2526392C2 |
| METHOD FOR FINAL TREATMENT OF POLYOLEFINS | 2007 |
|
RU2444530C2 |
| TREATMENT METHOD OF POLYOLEFIN PARTICLES PRODUCED BY GAS-PHASE POLYMERIZATION | 2013 |
|
RU2600550C1 |
| METHOD OF DEGASSING AND IMPARTING INTERMEDIATE PROPERTIES TO POLYOLEFIN PARTICLES OBTAINED DURING POLYMERISATION OF OLEFINS | 2013 |
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RU2610541C2 |
| METHOD FOR EFFICIENT BLOWING OF POLYMER PARTICLES | 2017 |
|
RU2750609C2 |
| POLYMERIZATION METHOD INVOLVING UNLOADING POLYOLEFIN PARTICLES FROM A GAS-PHASE POLYMERIZATION REACTOR | 2018 |
|
RU2730015C1 |
| METHOD OF PRODUCING POLYMERS | 2009 |
|
RU2493176C2 |
| PRODUCTION PROCESS FOR GRAFT POLYOLEFIN COPOLYMERS AND APPARATUS FOR CONDUCTING THE PROCESS | 1997 |
|
RU2179559C2 |
| METHOD OF GAS-PHASE POLYMERIZATION OF OLEFINS AND APPARATUS FOR ITS EMBODIMENT (VERSIONS) | 1993 |
|
RU2126015C1 |
