Invention Grant
- Patent Title: Multi-stage process for producing a C2 to C8 olefin polymer composition
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Application No.: US17273325Application Date: 2019-09-19
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Publication No.: US11897975B2Publication Date: 2024-02-13
- Inventor: Klaus Nyfors , Vasileios Kanellopoulos , Erno Elovainio , Ravindra Tupe , Victor Sumerin
- Applicant: BOREALIS AG
- Applicant Address: AT Vienna
- Assignee: BOREALIS AG
- Current Assignee: BOREALIS AG
- Current Assignee Address: AT Vienna
- Agency: TAROLLI, SUNDHEIM, COVELL & TUMMINO L.L.P.
- Priority: EP 197567 2018.09.28
- International Application: PCT/EP2019/075109 2019.09.19
- International Announcement: WO2020/064484A 2020.04.02
- Date entered country: 2021-03-04
- Main IPC: C08F10/02
- IPC: C08F10/02 ; C08F2/00 ; C08F2/34 ; C08F4/02 ; C08F4/64 ; C08F210/02 ; C08F210/06 ; C08F210/14
Abstract:
The present invention relates to a multi-stage process for producing a C2 to C8 olefin polymer composition in a process comprising at least two reactors, wherein a pre-polymerized solid Ziegler-Natta catalyst is prepared by carrying out an off-line pre-polymerization of a solid Ziegler-Natta catalyst component with a C2 to C4 olefin monomer before feeding to the polymerization process.
Public/Granted literature
- US20210317236A1 A MULTI-STAGE PROCESS FOR PRODUCING A C2 TO C8 OLEFIN POLYMER COMPOSITION Public/Granted day:2021-10-14
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