FIELD: chemistry.
SUBSTANCE: invention relates to a continuous method of producing homopolymers or copolymers of ethylene containing polymerisable ethylene or copolymerisable ethylene and one or more olefins. Method is carried out in the presence of a chromium catalyst in a gas-phase polymerisation reactor which is equipped with a gas circulation pipeline for sampling: reactor gas from a reactor, feeding reactor gas into a heat exchanger for cooling and feeding reactor gas back to the reactor. Polymerisation is carried out at temperature of 30–130 °C and at pressure of 0.1–10 MPa with addition of an ester of an aliphatic carboxylic acid having 8–24 carbon atoms.
EFFECT: technical result is obtaining polyethylene with good optical, mechanical and process properties and low content of gels.
15 cl, 1 tbl, 6 ex
| Title | Year | Author | Number |
|---|---|---|---|
| OLEFIN POLYMERISATION METHOD | 2017 |
|
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|
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| METHOD OF GAS-PHASE FLUIDIZATION FOR PREPARING HOMO- AND COPOLYMERS OF ETHYLENE | 1998 |
|
RU2229479C2 |
