METHOD OF THE CONTINUOUS GASEOUS-PHASE POLYMERIZATION Russian patent published in 2007 - IPC C08F2/34 C08F10/00 C08F2/42 

FIELD: chemical industry; other industries; methods of the continuous gaseous-phase polymerization.

SUBSTANCE: the invention is pertaining to the method of the continuous gaseous-phase polymerization for production of the ethylene and propylene homopolymers and copolymers. The invention presents the method of the gaseous-phase polymerization for production of the ethylene and propylene homopolymers and copolymers, in which ethylene, propylene or the mixtures containing ethylene and propylene and α-monoolefins with 3-8 atoms of carbon are polymerized in the zone of polymerization of the reactor of the gaseous-phase polymerization at the temperature from 30°С up to 125°С and the pressure from 1 bar up to 100 bar in the gaseous phase in the layer, which includes the finely dispersed polymer. In the presence of the catalyst the reactor gas is exposed to circulation for withdrawal of the polymerization reaction heat, and the circulated reactor gas after its withdrawal from the reactor is exposed to action of the catalytic poison having the boiling temperature exceeding the maximum temperature in the gas circulating system, which is notable for the fact, that the circulated reactor gas after treatment with the catalytic poison is gated through the cyclone and in the capacity of the catalytic poison they use the catalytic poison having the vapor tension at the temperature of 20°С less, than 10000 Pa. The technical result of the invention is prevention of formation of the polymeric settlings in the system of the gas circulation of the installations of the gaseous-phase polymerization, the increased service life of the installations, the improved quality of the polymerization product.

EFFECT: the invention ensures prevention of formation of the polymeric settlings in the system of the gas circulation of the installations of the gaseous-phase polymerization, the increased service life of the installations, the improved quality of the polymerization product.

6 cl, 2 tbl, 10 ex