Methods for improving production in gas phase polymerization
US-12152095-B2 · Nov 26, 2024 · US
Self limiting catalyst composition for ethylene polymerization
US8993692B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8993692-B2 |
| Application number | US-201113700503-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jun 29, 2011 |
| Priority date | Jun 30, 2010 |
| Publication date | Mar 31, 2015 |
| Grant date | Mar 31, 2015 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A process for polymerizing ethylene to produce an ethylene-based polymer including contacting ethylene with a Ziegler-Natta procatalyst, an alkylaluminum cocatalyst and a self limiting agent selected from the group of aliphatic, cycloaliphatic, substituted cycloaliphatic or aromatic esters, anhydrides and amides such that the self limiting agent reduces polymerization rates to no greater than 40% of the polymerization rate in the absence of the self limiting agent at temperatures equal to or greater than 120° C. is provided.
First claim
Opening claim text (preview).
We claim: 1. A process for polymerizing ethylene comprising: (i) contacting, in a first reactor, ethylene; optionally at least one comonomer; with a catalyst composition comprising one or more Group 3-10 transition metal containing Ziegler-Natta procatalyst compounds, one or more alkylaluminum cocatalysts; and one or more self limiting agents, wherein the one or more self limiting agents are selected from the group of consisting dihydro-2H-pyran-2,6(3H)-dione; 4-methylcyclohexane-1…
Assignees
Inventors
Classifications
- C08F210/16Primary
Chemistry & Metallurgy · mapped topic
- C08F110/02Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
Patent family
Related publications grouped by family.
External sources
Next steps
Free tools are coming soon. Tell us what you want to track and we'll notify you.
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US8993692B2 cover?
- A process for polymerizing ethylene to produce an ethylene-based polymer including contacting ethylene with a Ziegler-Natta procatalyst, an alkylaluminum cocatalyst and a self limiting agent selected from the group of aliphatic, cycloaliphatic, substituted cycloaliphatic or aromatic esters, anhydrides and amides such that the self limiting agent reduces polymerization rates to no greater than 4…
- Who is the assignee on this patent?
- Jorgensen Robert J, Ewart Sean W, Campbell Jr Richard E, and 4 more
- What technology area does this patent fall under?
- Primary CPC classification C08F210/16. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Mar 31 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).