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公开(公告)号：JPH11246608A
公开(公告)日：1999-09-14
申请号：JP36457698
申请日：1998-12-22
Applicant: BASF AG
Inventor： LANGE ARMIN , MICKLITZ WOLFGANG DR , KARER RAINER , EVERTZ KASPAR DR , MIHAN SHAHRAM DR , FEINDT HANS-JACOB DR , HECKER MANFRED DR , BAUER PETER , ROSENDORFER PHILIPP DR
Abstract: PROBLEM TO BE SOLVED: To avoid the production of a polymer deposit in a circulating gas line and carry out the continuous vapor-phase polymerization by polymerizing a mixture of ethylene and/or propene with a specific olefin under specific conditions. SOLUTION: A catalyst poison having a higher boiling point than the maximum temperature in a circulating gas line in an amount so as not to cause a great loss in the productivity of the catalyst in a vapor-phase polymerization reactor is metered and fed to the circulating gas line when carrying out the continuous vapor phase polymerization of a mixture of ethylene and/or propene with a C3 -C8 -α-monoolefin in the presence of a catalyst in the vapor phase in a finely dispersed polymeric bed in the vapor-phase polymerization reactor under conditions of 30-125 deg.C and 1-100 bar while removing heat of polymerization by circulating a reactor gas. One or more kinds of compounds having a functional group selected from NR2 , NR, OR, O, =O, OS, S and =S (R is H or a 1-8C alkyl) are preferably used as the catalyst poison.
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公开(公告)号：DE19800020A1
公开(公告)日：1999-07-08
申请号：DE19800020
申请日：1998-01-05
Applicant: BASF AG
Inventor： LANGE ARMIN DR , MICKLITZ WOLFGANG DR , KARER RAINER , EVERTZ KASPAR DR , MIHAN SHAHRAM DR , FEINDT HANS-JACOB DR , HECKER MANFRED DR , BAUER PETER , ROSENDORFER PHILIPP DR
Abstract: Continuous gas phase polymerization for producing ethylene homopolymers and -copolymers, comprises polymerizing ethylene or monoolefin from but-1-en, pent-1-en, 2-methylpentene, hex-1-en, hept-1-en and oct-1-en in the a polymerization reactor; and endowing a catalyst poison with boiling point higher than a circle gas pipeline, and molecular weight greater than 100 g/mol at a position after the reactor, but before the cooler and compressor. Continuous gas phase polymerization for producing ethylene homopolymers and -copolymers, comprises polymerizing ethylene and/or monoolefin from but-1-en, pent-1-en, 2-methylpentene, hex-1-en, hept-1-en or oct-1-en, in the polymerization zone of a gas phase polymerization reactor at 30-125[deg]C and 1-100 bar in the gaseous phase in a finely divided polymer bed, in the presence of a metallocene catalyst in carrier form polymer, where a reactor gas is lead into the circle gas pipeline for the removal of the polymerization heat; and endowing a catalyst poison with boiling point higher than circle gas pipeline and molecular weight greater than 100 g/mol at a position after the reactor but before the cooler and compressor, for preventing polymer linings, such that the productivity of the catalyst is not essentially affected in the reactor.
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公开(公告)号：DE19716239A1
公开(公告)日：1998-10-22
申请号：DE19716239
申请日：1997-04-18
Applicant: BASF AG
Inventor： MIHAN SHAHRAM DR , LANGE ARMIN DR , ROSENDORFER PHILIPP DR , HACK JOHANNES
Abstract: The invention relates to a method for polymerizing alpha -olefins in a gaseous phase at a temperature ranging from 30 to 150 DEG C and at a pressure between 5 and 80 bars with a catalyst or a catalyst mixture which contains, as an antistatic agent, 0.1-5 wt. % ZnO and/or water-free MgO in relation to the total catalyst mixture. The inventive method excludes a method according to which the catalyst mixture contains a chrome catalyst and an MgO-based Ziegler catalyst which is modified with an alkene and alkylaluminium hydride and contains free MgO, the total MgO volume being no less than 2 wt. % of the catalyst mixture.
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