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

Patent metadata

Field	Value
Publication number	US-9827561-B2
Application number	US-201415032008-A
Country	US
Kind code	B2
Filing date	Nov 17, 2014
Priority date	Nov 18, 2013
Publication date	Nov 28, 2017
Grant date	Nov 28, 2017

Abstract

The present invention relates to a ligand compound, a catalyst system for olefin oligomerization, and a method for olefin oligomerization using the same. The present ligand compound is a compound having a certain new structure and enables provision of a catalyst system for olefin oligomerization that can oligomerize ethylene with higher catalytic activity.

First claim

The invention claimed is:

1. A ligand compound represented by the following Chemical Formula 1:

in Chemical Formula 1,
X is a pyrrolidinyl group substituted or unsubstituted with a C 1 -C 3 alkyl group, or a piperazinyl group substituted or unsubstituted with a C 1 -C 3 alkyl group,
R 3 to R 6 are each independently a phenyl group, and
n is an integer of 3 or 4.

2. The ligand compound according to claim 1 wherein the ligand compound is selected from the group consisting of the following compounds:

3. A catalyst system for olefin oligomerization comprising the ligand compound according to any one of claim 1 ; a transition metal source; and a cocatalyst.

4. The catalyst system for olefin oligomerization according to claim 3 wherein the transition metal source is a chromium source.

5. The catalyst system for olefin oligomerization according to claim 3 wherein the transition metal source is selected from the group consisting of chromium(III)acetylacetonate, tris(tetrahydrofuran)chromium trichloride, chromium(III)-2-ethylhexanoate, chromium(III)tris(2,2,6,6-tetramethyl-3,5-heptanedionate), chromium(III)benzoylacetonate, chromium(III)hexafluoro-2,4-pentanedionate, and chromium(III)acetate hydroxide.

6. The catalyst system for olefin oligomerization according to claim 3 wherein the cocatalyst is selected from the group consisting of the compounds represented by the following Chemical Formulae 2 to 4,
—[Al(R 7 )—O] c -  [Chemical Formula 2]

in Chemical Formula 2,
each of R 7 is independently a halogen, a C 1 -C 20 alkyl group or a C 1 -C 20 haloalkyl, and c is an integer of 2 or more,
D(R 8 ) 3   [Chemical Formula 3]

in Chemical Formula 3,
D is aluminum or boron, and
R 8 is hydrogen, halogen, a C 1 -C 20 alkyl or a C 1 -C 20 haloalkyl,
[L-H] + [Q(E) 4 ] −   [Chemical Formula 4]

in Chemical Formula 4,
L is a neutral Lewis base,
[L-H] + is a Bronsted acid,
Q is Br 3+ or Al 3+ , and
each of E is independently a C 6 -C 20 aryl or a C 1 -C 20 alkyl, wherein the C 6 -C 20 aryl or C 1 -C 20 alkyl is unsubstituted or substituted with one or more substituents selected from the group consisting of a halogen, a C 1 -C 20 alkyl, a C 1 -C 20 alkoxy, and a phenoxy.

7. The catalyst system for olefin oligomerization according to claim 3 for use in oligomerization of ethylene.

8. A method for olefin oligomerization comprising: the step of multimerizing olefins in the presence of the catalyst system for olefin oligomerization according to claim 3 .

9. The method for olefin oligomerization according to claim 8 wherein the multimerization step is conducted at a temperature of 5° C. to 200° C.

10. The method for olefin oligomerization according to claim 8 wherein the multimerization step is conducted under a pressure of 1 bar to 300 bar.

11. The method for olefin oligomerization according to claim 8 wherein the olefin is ethylene.

12. A catalyst system for olefin oligomerization comprising the ligand compound according to claim 1 ; a transition metal source; and a catalyst.

13. A catalyst system for olefin oligomerization comprising the ligand compound according to claim 2 ; a transition metal source; and a catalyst.

Assignees

• Lg Chemical Ltd

Inventors

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

Classifications

• C07F9/46

  Phosphinous acids [R2POH], [R2P(= O)H]: Thiophosphinous acids {including[R2PSH]; [R2P(=S)H]; Aminophosphines [R2PNH2]; Derivatives thereof} · CPC title

• C07F9/650958

  Chemistry & Metallurgy · mapped topic

• B01J2531/62

  Chromium · CPC title

• B01J2231/20

  Olefin oligomerisation or telomerisation · CPC title

• B01J2531/002

  Materials · CPC title