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    Polymerization Process to Make Low Density Polyethylene
    1.
    发明申请
    Polymerization Process to Make Low Density Polyethylene 有权
    制备低密度聚乙烯的聚合方法

    公开(公告)号：US20130197168A1

    公开(公告)日：2013-08-01

    申请号：US13876292

    申请日：2011-09-21

    申请人： Otto J. Berbee ,  Cornelis F.J. den Doelder ,  Cornelis J. Hosman

    发明人： Otto J. Berbee ,  Cornelis F.J. den Doelder ,  Cornelis J. Hosman

    IPC分类号： C08F10/02

    CPC分类号： C08F10/02 ,  C08F110/02 ,  C08F210/02 ,  C08F2/38 ,  C08F2/001 ,  C08F2500/11 ,  C08F2500/12 ,  C08F218/08 ,  C08F4/34

    摘要： A high pressure polymerization process to form an ethylene-based polymer comprises the steps of: A. Injecting a first feed comprising a chain transfer agent system (CTA system) and ethylene into a first autoclave reactor zone operating at polymerization conditions to produce a first zone reaction product, the CTA system of the first reactor zone having a transfer activity Z1; and B. (1) Transferring at least part of the first zone reaction product to a second reactor zone selected from a second autoclave reactor zone or a tubular reactor zone and operating at polymerization conditions, and, optionally, (2) freshly injecting, a second feed into the second reactor zone to produce a second zone reaction product, with the proviso that at least one of the first reactor zone product and the freshly injected feed comprises a CTA system with a transfer activity of Z2; and with the proviso that the ratio of Z1:Z2 is greater than 1.

    摘要翻译： 形成乙烯基聚合物的高压聚合方法包括以下步骤：A.将包含链转移剂体系（CTA体系）和乙烯的第一种进料注入到在聚合条件下操作的第一高压釜反应器区域中以产生第一区 反应产物，具有转移活性Z1的第一反应器区域的CTA体系; （1）将至少部分第一区反应产物转移到选自第二高压釜反应器区或管式反应器区并在聚合条件下操作的第二反应器区，以及任选地（2）新鲜地注入， 第二进料到第二反应器区以产生第二区反应产物，条件是第一反应器区产物和新注入的进料中的至少一个包含具有Z 2的转移活性的CTA体系; 并且条件是Z1:Z2的比率大于1。

    Polymerization processes with fresh ethylene distributions for preparation of low density ethylene-based polymers
    5.
    发明授权
    Polymerization processes with fresh ethylene distributions for preparation of low density ethylene-based polymers 有权

    公开(公告)号：US09120880B2

    公开(公告)日：2015-09-01

    申请号：US14352506

    申请日：2012-10-10

    申请人： Werner Zschoch ,  Otto J. Berbee ,  Cornelis J. Hosman

    发明人： Werner Zschoch ,  Otto J. Berbee ,  Cornelis J. Hosman

    IPC分类号： C08F2/02 ,  C08F2/38 ,  C08F10/02 ,  C08F110/02

    CPC分类号： C08F110/02 ,  C08F10/02 ,  C08F2/00 ,  C08F2/38 ,  C08F2500/08 ,  C08F2500/11 ,  C08F2500/12 ,  C08F2500/26

    摘要： The invention provides a high pressure polymerization process to form an ethylene-based polymer, the process comprising at least the following steps: feeding ethylene to a first reaction zone and to one or more subsequent reaction zones, and wherein for each subsequent reaction zone that receives fresh ethylene, the ratio, Rn (n=reaction zone number, n>1), of “mass fraction of fresh ethylene fed to the first reaction zone (RZ1)” to “mass fraction of fresh ethylene fed to the nth reaction zone (RZn)” is (Rn=RZ1/RZn) greater than 1, or is from 0 to 0.30, and wherein the “total amount of ethylene fed to the polymerization process” derives from at least one fresh ethylene stream and at least one recycled ethylene stream, and wherein the at least one recycled ethylene stream comprises at least one chain transfer agent and/or comprises at greater than, or equal to, 1 weight %, based on total amount of components in recycled ethylene stream, of one or more non-ethylene components and/or CTA(s); and wherein the inlet feed to each reaction zone comprises less than 5 weight ppm oxygen based on the total weight of mass flows fed to the reaction zone. The invention also provides a high pressure polymerization process to form an ethylene-based polymer, the process comprising at least the following steps: feeding ethylene to a first reaction zone and to one or more subsequent reaction zones, and wherein 100 weight percent of the total amount of fresh ethylene fed to the polymerization process is fed to the first reaction zone, and wherein the “total amount of ethylene fed to the polymerization process” derives from at least one fresh ethylene stream and at least one recycled ethylene stream, and wherein the at least one recycled ethylene stream comprises at least one chain transfer agent and/or comprises at greater than, or equal to, 1 weight %, based on total amount of components in recycled ethylene stream, of one or more non-ethylene components and/or CTA(s); and wherein the inlet stream to each reaction zone comprises less than, or equal to, 5 weight ppm oxygen, based on the total weight of mass flows fed to the reaction zone.

    Polymerization process to make low density polyethylene
    6.
    发明授权
    Polymerization process to make low density polyethylene 有权
    聚合过程制备低密度聚乙烯

    公开(公告)号：US09234055B2

    公开(公告)日：2016-01-12

    申请号：US13876292

    申请日：2011-09-21

    申请人： Otto J. Berbee ,  Cornelis F. J. den Doelder ,  Cornelis J. Hosman

    发明人： Otto J. Berbee ,  Cornelis F. J. den Doelder ,  Cornelis J. Hosman

    IPC分类号： C08F2/00 ,  C08F210/00 ,  C08F110/02 ,  C08F10/02 ,  C08F210/02

    CPC分类号： C08F10/02 ,  C08F110/02 ,  C08F210/02 ,  C08F2/38 ,  C08F2/001 ,  C08F2500/11 ,  C08F2500/12 ,  C08F218/08 ,  C08F4/34

    摘要： A high pressure polymerization process to form an ethylene-based polymer comprises the steps of: A. Injecting a first feed comprising a chain transfer agent system (CTA system) and ethylene into a first autoclave reactor zone operating at polymerization conditions to produce a first zone reaction product, the CTA system of the first reactor zone having a transfer activity Z1; and B. (1) Transferring at least part of the first zone reaction product to a second reactor zone selected from a second autoclave reactor zone or a tubular reactor zone and operating at polymerization conditions, and, optionally, (2) freshly injecting, a second feed into the second reactor zone to produce a second zone reaction product, with the proviso that at least one of the first reactor zone product and the freshly injected feed comprises a CTA system with a transfer activity of Z2; and with the proviso that the ratio of Z1:Z2 is greater than 1.

    摘要翻译： 形成乙烯基聚合物的高压聚合方法包括以下步骤：A.将包含链转移剂体系（CTA体系）和乙烯的第一种进料注入到在聚合条件下操作的第一高压釜反应器区域中以产生第一区 反应产物，具有转移活性Z1的第一反应器区域的CTA体系; （1）将至少部分第一区反应产物转移到选自第二高压釜反应器区或管式反应器区并在聚合条件下操作的第二反应器区，以及任选地（2）新鲜地注入， 第二进料到第二反应器区以产生第二区反应产物，条件是第一反应器区产物和新注入的进料中的至少一个包含具有Z 2的转移活性的CTA体系; 并且条件是Z1:Z2的比率大于1。