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公开(公告)号:US10358509B2
公开(公告)日:2019-07-23
申请号:US15559792
申请日:2016-03-23
Applicant: Basell Polyolefine GmbH
Inventor: Volker Fraaije , Michael Lynch , Shahram Mihan , Gerhardus Meier , Ulf Schueller
IPC: C08F10/02
Abstract: The present disclosure relates to a continuous process for the preparation of ethylene homopolymers or ethylene copolymers comprising polymerizing ethylene or copolymerizing ethylene and one or more other olefins in the presence of a chromium catalyst in a gas-phase polymerization reactor which is equipped with a cycle gas line for withdrawing reactor gas from the reactor, leading the reactor gas through a heat-exchanger for cooling and feeding the reactor gas back to the reactor, wherein the polymerization is carried out at a temperature from 30° C. to 130° C. and a pressure of from 0.1 to 10 MPa and an aliphatic carboxylic acid ester having from 8 to 24 carbon atoms is added.
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公开(公告)号:US20180079842A1
公开(公告)日:2018-03-22
申请号:US15559792
申请日:2016-03-23
Applicant: Basell Polyolefine GmbH
Inventor: Volker Fraaije , Michael Lynch , Shahram Mihan , Gerhardus Meier , Ulf Schueller
IPC: C08F10/02
CPC classification number: C08F10/02 , C08F2500/07 , C08F210/16 , C08F2/005 , C08F2/007 , C08F210/14 , C08F2500/12 , C08F2500/13 , C08F2500/14 , C08F2500/26 , C08F4/24
Abstract: The present disclosure relates to a continuous process for the preparation of ethylene homopolymers or ethylene copolymers comprising polymerizing ethylene or copolymerizing ethylene and one or more other olefins in the presence of a chromium catalyst in a gas-phase polymerization reactor which is equipped with a cycle gas line for withdrawing reactor gas from the reactor, leading the reactor gas through a heat-exchanger for cooling and feeding the reactor gas back to the reactor, wherein the polymerization is carried out at a temperature from 30° C. to 130° C. and a pressure of from 0.1 to 10 MPa and an aliphatic carboxylic acid ester having from 8 to 24 carbon atoms is added.
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