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Title:
GAS-PHASE POLYMERIZATION OF ALPHA-OLEFINS
Document Type and Number:
WIPO Patent Application WO/2011/136492
Kind Code:
A2
Abstract:
Disclosed is a highly productive polymerization method of alpha-olefins, using an internal-circulation-type fluidized bed polymerization reactor. The gas-phase polymerization method of alpha-olefins includes: supplying a circulating gas including alpha-olefins and/or an inert gas to a reactor; polymerizing the alpha-olefins into a polyolefin in two separate polymerization regions within the reactor; and removing the produced polyolefin polymer from the reactor. The reactor is divided into the two polymerization regions by a draft tube; an internal portion of the draft tube forms a riser region in which the growing polyolefin polymer rises and moves in high-speed fluidizing conditions, an external portion of the draft tube forms an annulus region in which the polyolefin polymer passing through the riser region drops and moves by means of gravitational force, the polyolefin polymer passing through the annulus region is reintroduced into a lower portion of the riser region, and the polyolefin polymer is polymerized while being circulated in the riser region and in the annulus region.

Inventors:
KANG SUNG-WOO (KR)
KIM NAM-KYU (KR)
JUN YOUNG-JAE (KR)
KIM MAN-JUNG (KR)
KIM KIL-SU (KR)
Application Number:
PCT/KR2011/002765
Publication Date:
November 03, 2011
Filing Date:
April 19, 2011
Export Citation:
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Assignee:
DAELIM IND CO LTD (KR)
KANG SUNG-WOO (KR)
KIM NAM-KYU (KR)
JUN YOUNG-JAE (KR)
KIM MAN-JUNG (KR)
KIM KIL-SU (KR)
International Classes:
C08F2/34; B01J19/24; C08F10/00; C08F210/16
Domestic Patent References:
WO1994028032A11994-12-08
Foreign References:
US5834571A1998-11-10
US5436304A1995-07-25
EP0089691A21983-09-28
US5352749A1994-10-04
US4621952A1986-11-11
US4703094A1987-10-27
JPS5832634A1983-02-25
US4958006A1990-09-18
US4543399A1985-09-24
Other References:
"D.Geldart, Gas Fluidization Technology", 1986, J. WILEY & SONS LTD., pages: 155
See also references of EP 2428524A4
Attorney, Agent or Firm:
LEE, SANG-HUN (KR)
이상헌 (KR)
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Claims: