发明名称 |
TREATMENT METHOD OF POLYOLEFIN PARTICLES PRODUCED BY GAS-PHASE POLYMERIZATION |
摘要 |
FIELD: technological processes.SUBSTANCE: invention relates to a method of treating polyolefin particles produced by gas-phase polymerization of one or several olefins in presence of a catalytic system of polymerization and alkane C-Cacting as a solvent of polymerization in a gas-phase polymerization reactor. Method involves continuous or periodical dropping of polyolefin particles from the gas-phase polymerization reactor, transfer of the particles to the stage of degassing consisting of three degasifiers. Polyolefin particles in the first degasifier contact with a gaseous flow containing at least 85 mol% of alkane C-C. Average time of polyolefin particles remaining in the first degasifier is from 5 minutes up to 5 hours. In the second degasifier polyolefin particles are in contact with a flow containing nitrogen and water vapour. Average time of polyolefin particles remaining in the second degasifier is from 5 minutes up to 2 hours. Herewith the contacting is carried out in conditions without condensation of moisture. In the third degasifier polyolefin particles are in contact with a flow of nitrogen. Average time of polyolefin particles being in the third degasifier makes from 5 minutes up to 8 hours. Also described is a method of preparing a polyolefin polymer.EFFECT: possibility of processing almost all monomers and comonomers simultaneously dropped with polyolefin particles to produce polyolefin products with good organoleptic characteristics without odour.12 cl, 1 dwg, 1 ex |
申请公布号 |
RU2600550(C1) |
申请公布日期 |
2016.10.20 |
申请号 |
RU20150125327 |
申请日期 |
2013.12.11 |
申请人 |
BASELL POLYOLEFINE GMBH |
发明人 |
PENZO, Giuseppe;MEI, Giulia;MEI, Gabriele;DE LUCIA, Antonio;BAITA, Pietro |
分类号 |
C08F6/00;C08F2/34;C08F10/00;C08F10/02 |
主分类号 |
C08F6/00 |
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