公开(公告)号：US20140288257A1

公开(公告)日：2014-09-25

申请号：US14352506

申请日：2012-10-10

Applicant: DOW GLOBAL TECHNOLOGIES LLC

Inventor： Werner Zschoch ,  Otto J. Berbee ,  Cornelis J. Hosman

IPC: C08F110/02

CPC classification number: C08F110/02 ,  C08F10/02 ,  C08F2/00 ,  C08F2/38 ,  C08F2500/08 ,  C08F2500/11 ,  C08F2500/12 ,  C08F2500/26

Abstract: 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.

公开(公告)号：US20140135459A1

公开(公告)日：2014-05-15

申请号：US13858640

申请日：2013-04-08

Applicant: Dow Global Technologies LLC

Inventor： Teresa P. Karjala ,  Christopher R. Eddy ,  Mehmet Demirors ,  Wallace W. Yau ,  Sarat Munjal ,  Stefan Hinrichs ,  Jian Wang ,  Otto J. Berbee ,  Werner Zschoch ,  Cornelis J. Hosman ,  Lonnie G. Hazlitt

IPC: C08F10/02

CPC classification number: C08F10/02 ,  C08F110/02 ,  Y10S526/917 ,  C08F2/01 ,  C08F2/001 ,  C08F2/38 ,  C08F2/00 ,  C08F2500/08 ,  C08F2500/12 ,  C08F2500/20 ,  C08F2500/04

Abstract: Disclosed is an ethylene-based polymer with a density from about 0.90 to about 0.94 in grams per cubic centimeter, with a molecular weight distribution (Mw/Mn) from about 2 to about 30, a melt index (I2) from about 0.1 to about 50 grams per 10 minutes, and further comprising sulfur from about 5 to about 4000 parts per million. The amount of sulfur is also determined based upon the total weight of the ethylene-based polymer. Also disclosed is process for making an ethylene-based polymer which includes the steps of splitting a process fluid for delivery into a tubular reactor; feeding an upstream process feed stream into a first reaction zone and at least one downstream process feed stream into at least one other reaction zone, where the process fluid has an average velocity of at least 10 meters per second; and initiating a free-radical polymerization reaction.

Abstract translation: 公开了密度为约0.90至约0.94（克/立方厘米）的乙烯基聚合物，分子量分布（Mw / Mn）为约2至约30，熔体指数（I 2）为约0.1至约 50克/ 10分钟，还含有约5至约4000ppm的硫。 硫的量也基于乙烯类聚合物的总重量来确定。 还公开了制备基于乙烯的聚合物的方法，其包括将工艺流体分离成管式反应器的步骤; 将上游工艺进料流输送到第一反应区和至少一个下游工艺进料流进入至少一个其它反应区，其中所述工艺流体具有至少10米/秒的平均速度; 并引发自由基聚合反应。

公开(公告)号：US08859704B2

公开(公告)日：2014-10-14

申请号：US13858640

申请日：2013-04-08

Applicant: Dow Global Technologies LLC

Inventor： Teresa P. Karjala ,  Christopher R. Eddy ,  Mehmet Demirors ,  Wallace W. Yau ,  Sarat Munjal ,  Stefan Hinrichs ,  Jian Wang ,  Otto J. Berbee ,  Werner Zschoch ,  Cornelis J. Hosman ,  Lonnie G. Hazlitt

IPC: C08F10/02 ,  C08F110/02 ,  C08F2/38 ,  B01J19/24

CPC classification number: C08F10/02 ,  C08F110/02 ,  Y10S526/917 ,  C08F2/01 ,  C08F2/001 ,  C08F2/38 ,  C08F2/00 ,  C08F2500/08 ,  C08F2500/12 ,  C08F2500/20 ,  C08F2500/04

Abstract: Disclosed is an ethylene-based polymer with a density from about 0.90 to about 0.94 in grams per cubic centimeter, with a molecular weight distribution (Mw/Mn) from about 2 to about 30, a melt index (I2) from about 0.1 to about 50 grams per 10 minutes, and further comprising sulfur from about 5 to about 4000 parts per million. The amount of sulfur is also determined based upon the total weight of the ethylene-based polymer. Also disclosed is process for making an ethylene-based polymer which includes the steps of splitting a process fluid for delivery into a tubular reactor; feeding an upstream process feed stream into a first reaction zone and at least one downstream process feed stream into at least one other reaction zone, where the process fluid has an average velocity of at least 10 meters per second; and initiating a free-radical polymerization reaction.

Abstract translation: 公开了密度为约0.90至约0.94（克/立方厘米）的乙烯基聚合物，分子量分布（Mw / Mn）为约2至约30，熔体指数（I 2）为约0.1至约 50克/ 10分钟，还含有约5至约4000ppm的硫。 硫的量也基于乙烯类聚合物的总重量来确定。 还公开了制备基于乙烯的聚合物的方法，其包括将工艺流体分离成管式反应器的步骤; 将上游工艺进料流进料到第一反应区和至少一个下游工艺进料流进入至少一个其它反应区，其中工艺流体的平均速度为至少10米/秒; 并引发自由基聚合反应。