FIELD: process engineering.
SUBSTANCE: invention relates to α-olefin gaseous polymerisation in reactor with fluidised bed in the presence of polymerisation catalyst. Fluidised bed reactor 1 is equipped with fluidisation grid 3, circulation circuit R and solid product discharge pipeline 13. Circulation circuit comprises vertical 10 and air conveyor pipe 11. Vertical 10 communicates fluidisation grid 3 with top zone of reactor 1. Solid product discharge pipeline 13 communicates via control valve 12 with vertical 10.
EFFECT: reduced amount of gas removed from plant together with polymer.
22 cl, 1 dwg, 4 ex
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