Process for preparing a catalyst component for polymerization of olefins
US-2015368381-A1 · Dec 24, 2015 · US
Method for producing propylene-based polymer
US8957166B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8957166-B2 |
| Application number | US-201013505109-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 29, 2010 |
| Priority date | Oct 29, 2009 |
| Publication date | Feb 17, 2015 |
| Grant date | Feb 17, 2015 |
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Abstract
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A method for producing a propylene-based polymer, including polymerizing propylene or propylene and an α-olefin except propylene in the presence of a catalyst with a horizontal polymerization reactor equipped with stirring vanes rotating around a horizontal axis therein by a continuous vapor-phase polymerization, which removes heat of polymerization by heat of vaporization of a liquefied propylene, wherein the reactor can set a plurality of area sections different in temperature in a horizontal direction inside the reactor, and satisfies at least one of i) a temperature difference, ΔT 1 =Tω−Tα, between an area section including an upstream end of the reactor (Tα) and a downstream end (Tω) thereof is 0.1 to 20° C. and ii) a temperature difference, ΔT 2 =Tx−Tz, between an area section including a catalyst feed part (Tx) and dew point (Tz) of a mix gas in the reactor is 0 to 5° C.
First claim
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The invention claimed is: 1. A method for producing a propylene-based polymer, the method comprising: polymerizing propylene or propylene and an α-olefin, which is not propylene, in the presence of a catalyst with a horizontal polymerization reactor comprising stirring vanes rotating around a horizontal axis inside the reactor by a continuous vapor-phase polymerization, which removes heat of polymerization by heat of vaporization of a liquefied propylene, wherein the catalyst is…
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Operations & Transport · mapped topic
- C08F10/06Primary
Chemistry & Metallurgy · mapped topic
Operations & Transport · mapped topic
Chemistry & Metallurgy · mapped topic
Operations & Transport · mapped topic
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- What does patent US8957166B2 cover?
- A method for producing a propylene-based polymer, including polymerizing propylene or propylene and an α-olefin except propylene in the presence of a catalyst with a horizontal polymerization reactor equipped with stirring vanes rotating around a horizontal axis therein by a continuous vapor-phase polymerization, which removes heat of polymerization by heat of vaporization of a liquefied propyl…
- Who is the assignee on this patent?
- Kobayashi Yoshitaka, Nakashima Takanori, Yukawa Kiyoshi, and 4 more
- What technology area does this patent fall under?
- Primary CPC classification C08F10/06. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Feb 17 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).