Methods for operating polyethylene reactor systems
US-2024392119-A1 · Nov 28, 2024 · US
Polyethylene processes and compositions thereof
US9023945B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9023945-B2 |
| Application number | US-201414191090-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 26, 2014 |
| Priority date | Feb 27, 2013 |
| Publication date | May 5, 2015 |
| Grant date | May 5, 2015 |
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Abstract
Official abstract text for this publication.
Embodiments of the present disclosure relate to a method of preparing polyethylene compositions comprising polymerizing ethylene in a first gas-phase reactor and polymerizing ethylene in a second gas-phase reactor in the presence of hydrogen; wherein at least one of the first or second gas-phase reactors comprises a first and second polymerization zone; wherein a hydrogen pressure of the first and second polymerization zones are different such that at least a portion of the second ethylene cycles through the first and second polymerization zones and a gas mixture of each polymerization zone is partially or totally prevented from entering the other zone.
First claim
Opening claim text (preview).
What is claimed is: 1. A process for preparing a polyethylene composition comprising the following steps: (a) providing at least a first amount of ethylene to a first gas-phase reactor; (b) providing at least a first amount of Ziegler-Natta catalyst to the first gas-phase reactor to produce at least a first amount of polyethylene polymer within the first gas-phase reactor; (c) transferring at least a portion of the first amount of polyethylene polymer and at least a portion of…
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Classifications
- C08L23/06Primary
Chemistry & Metallurgy · mapped topic
Cross-Sectional Technologies · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
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Frequently asked questions
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- What does patent US9023945B2 cover?
- Embodiments of the present disclosure relate to a method of preparing polyethylene compositions comprising polymerizing ethylene in a first gas-phase reactor and polymerizing ethylene in a second gas-phase reactor in the presence of hydrogen; wherein at least one of the first or second gas-phase reactors comprises a first and second polymerization zone; wherein a hydrogen pressure of the first …
- Who is the assignee on this patent?
- Basell Polyolefine Gmbh
- What technology area does this patent fall under?
- Primary CPC classification C08L23/06. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue May 05 2015 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).