CONTROL OVER POLYMERS DEGASSING PROCESS Russian patent published in 2017 - IPC C08F6/00 C08F6/02 B01J8/00 B01J8/02 

FIELD: technological processes.

SUBSTANCE: invention relates to polymers degassing control method. Described is vertical degasser with fixed layer operation method. Active polymer powder is continuously supplied into degasifier. Active polymer powder shows residual average efficiency ratio of 0.001–0.015. Degassing method involves stripping gas introduction into degasser containing 5–60 vol% of basic monomer. Gas coming from degasifier, has low content of basic monomer before recycling as stripping gas. Temperature inside degasifier is maintained within range to plus or minus 20 °C relative to temperature in polymerization reactor.

EFFECT: improved removal of residual non-converted monomers (comonomers), organic compounds and alkanes with low volatility, as well as production of polyolefin, having constant in time quality.

10 cl, 4 dwg, 2 tbl, 4 ex