METHOD FOR POLYMERISATION OF OLEFINS IN A GAS-PHASE REACTOR, WHICH INCLUDES AN UPFLOW REACTOR AND A DOWNFLOW REACTOR Russian patent published in 2019 - IPC C08F2/01 C08F2/34 C08F10/02 

Abstract RU 2703716 C1

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing an ethylene polymer, involving ethylene homopolymerisation or copolymerisation of ethylene with one or more comonomers in a gas-phase polymerisation reactor. Gas-phase polymerisation reactor has an upflow reactor in which growing polymer particles move upwards in fluidisation, fast fluidisation or other modes of transportation, and a downflow reactor in which growing polymer particles flow down in a sealed mold. Residual volume of polymer particles in downflow reactor makes 55–80 wt% of residual volume of polymer particles in gas-phase polymerisation reactor.

EFFECT: preventing and minimizing the formation of agglomerates, lumps or deposits on the wall of the reactor.

15 cl, 1 dwg, 1 tbl, 3 ex

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RU 2 703 716 C1

Authors

Meier, Gerhardus

Schueller, Ulf

Mei, Gabriele

Covezzi, Massimo

Baita, Pietro

Marturano, Lorella

Dates

2019-10-22Published

2017-11-09Filed