| 发明名称 |
PROCESS FOR POLYMERIZATION USING DENSE AND SPHERICAL ZIEGLER-NATTA TYPE CATALYST |
| 摘要 |
Some embodiments herein disclose a process for producing an ethylene polymer or copolymer which contains less than 5 ppm titanium and has a bulk density, in granular form, of at least 22.5 lbs/ft3, using a spheroidal Ziegler-Natta type olefin polymerization catalyst having a particle size distribution characterized by a Dm*/Dn of less than 3.0 and comprising a titanium compound, an aluminum compound, and a spheroidal magnesium chloride support. |
| 申请公布号 |
US2016326282(A1) |
申请公布日期 |
2016.11.10 |
| 申请号 |
US201615137241 |
申请日期 |
2016.04.25 |
| 申请人 |
NOVA Chemicals (International) S.A. |
发明人 |
Wang Qinyan;Kondage Savini Udara Suduweli;Kelly Mark;Baltimore Amy Marie;Logan Jessamyn Ross;Craig Tyler |
| 分类号 |
C08F210/16 |
主分类号 |
C08F210/16 |
| 代理机构 |
|
代理人 |
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| 主权项 |
1. A process for producing an ethylene polymer or copolymer which contains less than 5 ppm titanium and has a bulk density, in granular form, of at least 22.5 lbs/ft3, said process comprising contacting, under polymerization conditions, ethylene and at least one alpha-olefin, and a spheroidal Ziegler-Natta type olefin polymerization catalyst having a particle size distribution characterized by a Dm*/Dn of less than 3.0 and a mass average diameter Dm of from 5 to 100 μm, wherein said catalyst comprises:
i) a titanium metal compound, wherein at least 80% of said titanium metal compound is in the Ti3+ valence state; ii) an aluminum compound; and iii) a spheroidal magnesium chloride support, wherein the magnesium chloride support comprises particles with a mass average diameter Dm of from 10 to 100 μm, and a particle size distribution characterized by a Dm/Dn of less than 3.0. |
| 地址 |
Fribourg CH |
