Catalyst compositions for selective dimerization of ethylene

Patent metadata

Field	Value
Publication number	US-10105693-B2
Application number	US-201415102428-A
Country	US
Kind code	B2
Filing date	Dec 12, 2014
Priority date	Dec 13, 2013
Publication date	Oct 23, 2018
Grant date	Oct 23, 2018

Abstract

A catalyst composition, including a titanate of the formula Ti(OR) 4 wherein each R is the same or different, and is a hydrocarbon residue; a catalyst additive, wherein the catalyst additive is a dibutyl ether a silicate, a silazane, an aromatic ether, a fluorocarbon, or a combination comprising at least one of the foregoing; and an organic aluminum compound.

First claim

What is claimed is:

1. A catalyst composition comprising
a titanate of the formula Ti(OR) 4 wherein each R is the same or different, and is a hydrocarbon residue;
a catalyst additive, wherein the catalyst additive is a dibutyl ether an aromatic ether, or a combination thereof;
a catalyst modifier, wherein the catalyst modifier is an amine catalyst modifier or a further ether catalyst modifier distinct from the dibutyl ether and the aromatic ether, wherein the catalyst additive and the further ether catalyst modifier are present in a molar ratio of about 1:5 to about 5:1; and
an organic aluminium compound.

2. The catalyst composition of claim 1 , wherein the catalyst additive is di-n-butyl ether.

3. The catalyst composition of claim 1 , wherein the catalyst additive is the aromatic ether of the formula R 1 OR 2 , wherein each R 1 is a hydrocarbon residue and R 2 is an aromatic hydrocarbon residue.

4. The catalyst composition of claim 1 , wherein the catalyst composition is dissolved in a hydrocarbon solvent.

5. The catalyst composition of claim 1 , wherein the catalyst composition comprises a molar ratio of titanium to aluminum of about 1:1 to about 40:1.

6. The catalyst composition of claim 1 , wherein
the titanate is Ti(O-n-alkyl) 4 ; and
the organic aluminium compound is of the formula Al n R 3n , wherein n is 1 or 2 and each R is the same or different, and is hydrogen, a hydrocarbon residue, or halogen.

7. A process for the preparation of the catalyst composition of claim 1 , comprising
pre-treating the titanate, the catalyst modifier, and the catalyst additive with an inert solvent; and
combining the pre-treated titanate, the catalyst modifier, and the catalyst additive with the organic aluminum compound to provide the catalyst composition.

8. A reaction process for the preparation of an α-olefin, comprising
contacting an alkene with the catalyst composition of claim 1 under conditions effective to form the α-olefin.

9. The reaction process according to claim 8 , wherein the alkene is ethene and the α-olefin is 1-butene.

10. The reaction process of claim 8 , wherein the reaction process is conducted in a homogenous liquid phase comprising the α-olefin.

11. The reaction process of claim 8 , wherein the conditions comprise at least one of
a pressure of about 1 to about 120 bar, or
a temperature of about 30 to about 150° C.

12. A process for the preparation of a downstream product, the process comprising:
reacting the α-olefin prepared according to claim 8 , to provide the downstream product, wherein the downstream product is a homopolymer or copolymer comprising units derived from the α-olefin.

13. The process of claim 12 , further comprising shaping downstream product to provide an article.

14. The catalyst composition of claim 3 , wherein each R 1 and R 2 is the same or different substituted or unsubstituted C 6-15 aromatic group.

15. The catalyst composition of claim 4 , wherein the solvent is an alkane solvent, an aromatic solvent, an alkene solvent, or a combination comprising at least one of the foregoing.

16. The catalyst composition of claim 5 , wherein the catalyst composition comprises a ratio of titanium to aluminum of about 1:1 to about 1:5.

17. The catalyst composition of claim 6 , wherein the titanate is Ti(O-n-butyl) 4 and the organic aluminium compound is triethyl aluminum.

18. The process of claim 7 , wherein the inert solvent is hexane.

19. The reaction process of claim 10 , wherein the homogenous liquid phase comprises at least about 50 wt % 1-butene, based on the total weight of the liquid phase.

20. The reaction process of claim 11 , wherein the pressure is about 5 to about 50 bar, and the temperature is about 40 to about 80° C.

Assignees

• Saudi Basic Ind Corp

Inventors

• Schmidt Roland
• Al-Hazmi Mohammed H
• Al-Anazi Mohammed F
• DevRanjan Pradhan

Classifications

• B01J31/143

  of aluminium · CPC title

• B01J31/0204

  Ethers · CPC title

• B01J31/0212 Primary

  Alkoxylates · CPC title

• C07C2531/02

  containing organic compounds or metal hydrides · CPC title

• C08F2410/01

  Additive used together with the catalyst, excluding compounds containing Al or B · CPC title