Process for making crosslinked cable insulation using high melt strength ethylene-based polymer made in a tubular reactor and optionally modified with a branching agent
US-11912852-B2 · Feb 27, 2024 · US
Process for stopping and restarting polymerisation
US9505919B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9505919-B2 |
| Application number | US-201314649322-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 13, 2013 |
| Priority date | Dec 18, 2012 |
| Publication date | Nov 29, 2016 |
| Grant date | Nov 29, 2016 |
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Abstract
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Process for stopping and restarting a polymerization in a system having a gas phase fluidized bed or stirred bed reactor, a degassing vessel and a seedbed storage silo, by conducting a first polymerization in the reactor using a polymerization catalyst to produce a first polymer, stopping the polymerization and removing the first polymer from the reactor to the degassing vessel, and either: introducing from the seedbed storage silo into the reactor a different seed-bed compatible with a second polymerization, passing to the seedbed storage silo the first polymer from the degassing vessel to form a new seedbed in the storage silo, and conducting the second polymerization in the reactor to produce a second polymer; or passing to the reactor at least a portion of the first polymer from the degassing vessel to thereby form a new seedbed in the reactor, and conducting a polymerization in the reactor to produce polymer.
First claim
Opening claim text (preview).
The invention claimed is: 1. A process for stopping and restarting polymerisation in a polymerisation system comprising, i) a gas phase fluidised bed or stirred bed reactor. ii) two or more catalyst system feeds to pass at least first and second catalyst systems to the reactor, iii) a degassing vessel fluidly connected to the reactor to receive polymer product therefrom, and iv) at least one seed-bed storage silo connected to the degassing vessel to receive polymer therefrom…
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Classifications
- C08F2/01Primary
Chemistry & Metallurgy · mapped topic
Operations & Transport · mapped topic
Operations & Transport · mapped topic
- C08L23/0815Primary
Chemistry & Metallurgy · mapped topic
Chemistry & Metallurgy · mapped topic
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- What does patent US9505919B2 cover?
- Process for stopping and restarting a polymerization in a system having a gas phase fluidized bed or stirred bed reactor, a degassing vessel and a seedbed storage silo, by conducting a first polymerization in the reactor using a polymerization catalyst to produce a first polymer, stopping the polymerization and removing the first polymer from the reactor to the degassing vessel, and either: …
- Who is the assignee on this patent?
- Ineos Europe Ag
- What technology area does this patent fall under?
- Primary CPC classification C08F2/01. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Nov 29 2016 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).