POLYMERIZATION METHOD Russian patent published in 2000 - IPC

FIELD: polymerization processes. SUBSTANCE: invention proposes continuous gas-phase fluidized-bed polymerization of olefin monomer, in particular, ethylene, propylene, ethylene-propylene mixture, or mixture of ethylene and/or propylene with one or several other alpha-olefins in fluidized-bed reactor involving recirculation of gas stream containing at least some amount of ethylene and/or propylene through fluidized bed in presence of polymerization catalyst, provided that at least part of said gas stream withdrawn from reactor is cooled to condensation temperature. Method is distinguished by that at least part of condensed liquid is separated from gas stream and at least part of separated liquid is introduced directly into fluidized bed at the level where gas stream passing through fluidized bed practically achieves temperature of gas stream leaving reactor. EFFECT: increased productivity of process. 44 cl, 6 dwg, 3 tbl, 15 ex