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
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD FOR STARTING MULTIZONE CIRCULATING REACTOR | 2017 |
|
RU2720816C1 |
| METHOD FOR POLYMERIZATION OF OLEFINS IN A GAS-PHASE REACTOR WITH THREE OR MORE POLYMERIZATION ZONES | 2017 |
|
RU2709525C1 |
| POLYMERIZATION METHOD INVOLVING UNLOADING POLYOLEFIN PARTICLES FROM A GAS-PHASE POLYMERIZATION REACTOR | 2018 |
|
RU2730015C1 |
| METHOD FOR OLEFIN POLYMERIZATION IN A GAS PHASE | 2019 |
|
RU2743991C1 |
| METHOD OF POLYMERIZATION IN THE PRESENCE OF AN ADDITIVE, REDUCING STATISTICAL CHARGES | 2016 |
|
RU2653535C1 |
| GAS-PHASE METHOD OF PRODUCING ETHYLENE POLYMERS | 2019 |
|
RU2770427C1 |
| GAS PHASE OLEFIN POLYMERISATION METHOD | 2018 |
|
RU2733752C1 |
| OLEFIN POLYMERISATION METHOD | 2017 |
|
RU2673552C1 |
| METHOD OF POLYMERISING OLEFIN IN THE PRESENCE OF A COMPOSITION WITH ANTISTATIC ACTION | 2016 |
|
RU2729072C2 |
| TREATMENT METHOD OF POLYOLEFIN PARTICLES PRODUCED BY GAS-PHASE POLYMERIZATION | 2013 |
|
RU2600550C1 |
