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公开(公告)号：US20210253757A1
公开(公告)日：2021-08-19
申请号：US16973626
申请日：2019-06-13
发明人： Timothy W. Gambel , Curvel Hypolite , Daniel S. Rynearson , Michael J. Zogg, Jr. , Kyle E. Hart , Michael D. Turner , Jorge Rubalcaba , Pradeep Jain , Mehmet Demirors
摘要： A method of producing bimodal ethylene-based polymer includes reacting ethylene monomer and C3-C12 α-olefin comonomer in the presence of a first catalyst in an agitated reactor to produce a first polymer fraction, and outputting effluent from the agitated reactor. A second catalyst is added to the effluent downstream of the agitated reactor and upstream from a non-agitated reactor, the second catalyst facilitates production of a second polymer fraction having a density and melt index (I2) different from the first polymer fraction. The second catalyst and effluent are mixed in at least one mixer. The second catalyst, second polymer fraction, and the first polymer fraction are passed to the non-agitated reactor; and additional ethylene monomer, additional C3-C12 α-olefin comonomer, and solvent are passed to the non-agitated reactor to produce more second polymer fraction and thereby the bimodal ethylene-based polymer.
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公开(公告)号：US11814456B2
公开(公告)日：2023-11-14
申请号：US16973626
申请日：2019-06-13
发明人： Timothy W. Gambrel , Curvel Hypolite , Daniel S. Rynearson , Michael J. Zogg, Jr. , Kyle E. Hart , Michael D. Turner , Jorge Rubalcaba , Pradeep Jain , Mehmet Demirors
IPC分类号： C08F210/16 , B01J8/00 , B01J8/18 , B01J19/00 , B01J19/18 , C08F2/01 , C08F2/06 , C08F4/64 , C08F2/00
CPC分类号： C08F210/16 , B01J8/008 , B01J8/1827 , B01J19/0066 , B01J19/1837 , C08F2/01 , C08F2/06 , C08F4/64193 , B01J2219/00033 , C08F2/001 , C08F2800/20
摘要： A method of producing bimodal ethylene-based polymer includes reacting ethylene monomer and C3-C12 α-olefin comonomer in the presence of a first catalyst in an agitated reactor to produce a first polymer fraction, and outputting effluent from the agitated reactor. A second catalyst is added to the effluent downstream of the agitated reactor and upstream from a non-agitated reactor, the second catalyst facilitates production of a second polymer fraction having a density and melt index (I2) different from the first polymer fraction. The second catalyst and effluent are mixed in at least one mixer. The second catalyst, second polymer fraction, and the first polymer fraction are passed to the non-agitated reactor; and additional ethylene monomer, additional C3-C12 α-olefin comonomer, and solvent are passed to the non-agitated reactor to produce more second polymer fraction and thereby the bimodal ethylene-based polymer.
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公开(公告)号：US11059913B2
公开(公告)日：2021-07-13
申请号：US16631119
申请日：2018-07-02
发明人： Michael J. Zogg, Jr. , Santosh S. Bawiskar , Yi Jin , Daniel S. Rynearson , Harold W. Boone , Kate R. Brown , Barry D. Kluge, Jr.
摘要： A process to form an olefin-based polymer, said process comprising at least the following steps: a) polymerizing a reaction mixture comprising an olefin, in at least one reactor, in a solution polymerization, to form a polymer solution; b) feeding at least a portion of the polymer solution through at least one devolatilizer, to form the olefin-based polymer, in melt form; c) feeding at least a portion of the olefin-based polymer, in melt, form through a heat exchanger, and then into a pastillation apparatus to form polymer particles.
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