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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9731282 B1

PDFFull Text
Date of Patent:
Aug. 15, 2017

Filed:

Apr. 12, 2013

Ligand compound, organic chromium compound, catalyst system for ethylene oligomerization, preparation method thereof, and ethylene oligomerization method using the same

Applicant:

Lg Chem, Ltd., Seoul, KR;

Inventors:

Min-Seok Cho, Daejeon, KR;

Yong-Ho Lee, Daejeon, KR;

Seok-Pil Sa, Daejeon, KR;

Heon-Yong Kwon, Daejeon, KR;

Kyung-Jin Cho, Daejeon, KR;

Se-Young Kim, Daejeon, KR;

Sung-Min Lee, Daejeon, KR;

Ki-Soo Lee, Daejeon, KR;

Kyoung-Chan Lim, Daejeon, KR;

Assignee:

LG Chem, Ltd., Seoul, KR;

Attorney:

Dentons US LLP

Primary Examiner:

Rip A Lee

Int. Cl.
CPC ...
C07C 2/00 (2006.01); B01J 31/22 (2006.01); B01J 31/18 (2006.01); C07F 9/46 (2006.01); C07F 11/00 (2006.01); C08F 10/02 (2006.01); B01J 21/08 (2006.01); B01J 21/12 (2006.01); B01J 21/14 (2006.01); B01J 31/14 (2006.01); B01J 37/02 (2006.01); C07C 2/32 (2006.01); C07F 9/28 (2006.01); C08F 110/02 (2006.01); B01J 31/16 (2006.01);
U.S. Cl.
CPC ...
B01J 31/22 (2013.01); B01J 21/08 (2013.01); B01J 21/12 (2013.01); B01J 21/14 (2013.01); B01J 31/143 (2013.01); B01J 31/1616 (2013.01); B01J 31/1805 (2013.01); B01J 31/189 (2013.01); B01J 31/1845 (2013.01); B01J 31/1895 (2013.01); B01J 31/2204 (2013.01); B01J 37/0219 (2013.01); C07C 2/32 (2013.01); C07F 9/28 (2013.01); C07F 9/46 (2013.01); C07F 11/00 (2013.01); C07F 11/005 (2013.01); C08F 10/02 (2013.01); C08F 110/02 (2013.01); B01J 2231/20 (2013.01); B01J 2531/62 (2013.01); C07C 2531/14 (2013.01); C07C 2531/18 (2013.01); C07C 2531/22 (2013.01);
Abstract

The present invention relates to a ligand compound, an organic chromium compound, a catalyst system for ethylene oligomerization, a preparation method thereof, and an ethylene oligomerization method using the same. The catalyst system for ethylene oligomerization according to the present invention is used to prepare a low-density polyethylene in one reactor by using a small amount of comonomers such as alpha-olefin or by using only ethylene without comonomers, because it maintains high catalytic activity and high alpha-olefin selectivity even though supported on a support.

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