Ethylene tetramerization catalyst systems and method for preparing 1-octene using the same

Patent metadata

Field	Value
Publication number	US-9802874-B2
Application number	US-201314086530-A
Country	US
Kind code	B2
Filing date	Nov 21, 2013
Priority date	Jan 18, 2007
Publication date	Oct 31, 2017
Grant date	Oct 31, 2017

Abstract

Disclosed herein is a method of preparing 1-octene at high activity and high selectivity while stably maintaining reaction activity by tetramerizing ethylene using a chromium-based catalyst system comprising a transition metal or a transition metal precursor, a cocatalyst, and a P—C—C—P backbone structure ligand represented by (R 1 )(R 2 )P—(R 5 )CHCH(R 6 )—P(R 3 )(R 4 ).

First claim

The invention claimed is:

1. A method of preparing 1-octene by tetramizing ethylene using the following catalyst system consisting essentially of :
chromium or chromium compound,
an alkylaluminoxane cocatalyst, and
a P—C—C—P backbone structure ligand represented by Formula 1 below:

wherein R1, R2, R3 and R4 are each independently a hydrocarbyl group, a substituted hydrocarbyl group, a heterohydrocarbyl group and a substituted heterohydrocarbyl group, and each of the R1, R2, R3 and R4 has no substituent on atoms adjacent to the atoms bonded with P atoms.

2. The method of preparing 1-octene by tetramizing ethylene of claim 1 , wherein the method is operated at a temperature of −20-250° C.

3. The method of preparing 1-octene by tetramizing ethylene of claim 1 , wherein the method is operated at a temperature of 15-130° C.

4. The method of preparing 1-octene by tetramizing ethylene of claim 1 , wherein the method is operated at a temperature of 30-70° C.

5. The method of preparing 1-octene by tetramizing ethylene of claim 1 , wherein the method is operated at a pressure of atmospheric pressure-500 bar.

6. The method of preparing 1-octene by tetramizing ethylene of claim 1 , wherein the method is operated at a pressure of 10-70 bar.

7. The method of preparing 1-octene by tetramizing ethylene of claim 1 , wherein the method is operated at a pressure of 30-50 bar.

8. The method of preparing 1-octene by tetramizing ethylene of claim 1 , wherein the method is operated using inactive solvent selected from saturated aliphatic hydrocarbons, unsaturated aliphatic hydrocarbons, aromatic hydrocarbons, halogenated hydrocarbons, or a combination thereof.

9. The method of preparing 1-octene by tetramizing ethylene of claim 8 , wherein the inactive solvent selected from benzene, toluene, xylene, cumene, heptanes, cyclohexane, methylcyclohexane, methylcyclopentane, n-hexane, 1-hexene or a combination thereof.

10. The method of preparing 1-octene by tetramizing ethylene of claim 1 , wherein the aluminum of alkylaluminoxane : chromium or chromium compound is 1:1-10,000:1.

11. The method of preparing 1-octene by tetramizing ethylene of claim 1 , wherein the aluminum among alkylaluminoxane : chromium or chromium compound is 1:1-1,000:1.

Assignees

• Sk Innovation Co Ltd
• Sk Global Chemical Co Ltd

Inventors

• Han Taek Kyu
• Ok Myung Ahn
• Chae Sung Seok
• Kang Sang Ook
• Jung Jae Ho

Classifications

• B01J31/2404

  Cyclic ligands, including e.g. non-condensed polycyclic ligands, the phosphine-P atom being a ring member or a substituent on the ring · CPC title

• C07C2/34 Primary

  Metal-hydrocarbon complexes · CPC title

• B01J31/2409

  with more than one complexing phosphine-P atom · CPC title

• C07C11/02

  Alkenes · CPC title

• C07C2/26

  with hydrides or organic compounds (C07C2/20 takes precedence) · CPC title