Ligand compound, catalyst system for olefin oligomerization, and method for olefin oligomerization using the same

Patent metadata

Field	Value
Publication number	US-9643170-B2
Application number	US-201615195378-A
Country	US
Kind code	B2
Filing date	Jun 28, 2016
Priority date	Nov 19, 2013
Publication date	May 9, 2017
Grant date	May 9, 2017

Abstract

This disclosure relates to a novel ligand compound that can oligomerize ethylene with high catalyst activity and selectivity, a catalyst system for olefin oligomerization including the same, and a method for olefin oligomerization using the same.

First claim

The invention claimed is:

1. A catalyst system for olefin oligomerization, comprising:
a ligand compound represented by the following Chemical Formula 1;
a chromium source selected from the group consisting of chromium (III) acetylacetonate, tris(tetrahydrofuran)chromium trichloride, and chromium (III)-2-ethylhexanoate; and
a cocatalyst:

wherein, in chemical Formula 1,
X is R 1 —N, O, or S,
R 1 is hydrogen, a C1-20 alkyl group, a C6-40 aryl group, a C3-30 heteroaryl group, or a C3-30 arylalkyl group,
wherein the alkyl group, the aryl group, the heteroaryl group and the arylalkyl group optionally contain at least one heteroatom selected from N, O, F, S, and P,
R 2 to R 1 are independently a C6-40 aryl group, and
R 6 and R 7 are H or a C1-C20 alkyl group.

2. The catalyst system according to claim 1 , wherein the ligand compound represented by Chemical Formula 1 is selected from the group consisting of

3. The catalyst system according to claim 1 , wherein the cocatalyst is at least one selected from the group consisting of compounds represented by the following Chemical Formulae 2 to 4:
—[Al(R 8 )—O] e -  [Chemical Formula 2]

wherein, in Chemical Formula 2, R 8 's are identical to or different from each other, and are independently are a halogen radical, a C1-20 hydrocarbyl radical, or a C1-C20 hydrocarbyl radical substituted with a halogen, and c is an integer equal to or greater than 2,
D(R 9 ) 3   [Chemical Formula 3]

wherein, in Chemical Formula 3,
D is aluminum or boron, R 9 's are independently a C1-C20 hydrocarbyl or a C1-20 hydrocarbyl substituted with a halogen, and
[L-H] + [Q(E) 4 ] −   [Chemical Formula 4]

wherein, in Chemical Formula 4,
L is a neutral Lewis base, [L-H] + is a Bronsted acid, Q is boron or aluminum in a +3 oxidation state, E's are independently a C6-20 aryl group or a C1-20 alkyl group, at least one hydrogen of which is substituted or substituted with a halogen, a C1-20 hydrocarbyl, an alkoxy functional group, or a phenoxy functional group.

4. The catalyst system according to claim 1 , wherein the olefin is ethylene.

Assignees

• Lg Chemical Ltd

Inventors

• Shin Eun Ji
• Lee Yong Ho
• Lee Ki Soo
• Sa Seok Pil

Classifications

• C07F9/572

  Five-membered rings · CPC title

• C07C2531/14

  of aluminium or boron · CPC title

• C07C2/32

  as complexes, e.g. acetyl-acetonates {(complexes of salts of acids of halogen C07C2/20)} · CPC title

• B01J31/146

  of boron · CPC title

• B01J2531/62

  Chromium · CPC title