US4503279A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ethylene oligomerization process
Assignee: Shell USA Inc
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Filing: 1984-06-11
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Granted: 1985-03-05
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Expires: 2004-06-11
Abstract
Abstract Ethylene is oligomerized to linear, alpha-olefins by reacting ethylene in liquid phase solution in the presence of a catalyst composition produced by contacting in the presence of ethylene (1) a simple divalent nickel salt, (2) a boron hydride reducing agent, and (3) an o-dihydrocarbylphosphinophenyl alcohol or lower alkyl ether.
Inventors
- 👤 David M. Singleton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:46
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/26; C07C2/36; B; B01; B01J; B01J31/00; B01J31/02; B01J31/12; B01J31/14; B01J31/146; B01J31/16; B01J31/24; B01J31/2404; B01J2231/00; B01J2231/20; B01J2531/00; B01J2531/80; B01J2531/84; B01J2531/847; C07C2527/00; C07C2527/06; C07C2527/128; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/14; C07C2531/16; C07C2531/24; Y; Y02; Y02P; Y02P20/00; Y02P20/50; Y02P20/52
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
110 words
A process of oligomerizing ethylene to a mixture of olefinic products comprising a large proportion of alpha-olefins having high linearity which process comprises reacting ethylene in liquid phase solution at a temperature of about 25° C. to 150° C. in the presence of a catalyst composition produced by contacting in a polar organic solvent in the presence of ethylene (1) a simple divalent nickel salt having a solubility of at least 0.001 mole per liter in said polar organic solvent (2) a boron hydride reducing agent and (3) an o-dihydrocarbylphosphinophenyl alcohol and/or lower alkyl ether ligand, the molar ratio of nickel salt to ligand being from about 1:1 to 5:1.
Claim 2
Dependent Claim
110 words
A process of oligomerizing ethylene to a mixture of olefinic products comprising a large proportion of alpha-olefins having high linearity which process comprises reacting ethylene in liquid phase solution at a temperature of about 25° C. to 150° C. in the presence of a catalyst composition produced by contacting in a polar organic solvent in the presence of ethylene (1) a simple divalent nickel salt having a solubility of at least 0.001 mole per liter in said polar organic solvent (2) a boron hydride reducing agent and (3) an o-dihydrocarbylphosphinophenyl alcohol and/or lower alkyl ether ligand, the molar ratio of nickel salt to ligand being from about 1:1 to 5:1.
Claim 3
Dependent Claim
52 words
The process of claim 1 wherein the catalyst composition is produced in the presence of about 10 psig to 1500 psig of ethylene at a temperature of about 0° C. to 50° C. and the nickel salt has a solubility of at least 0.01 mole per liter in said polar organic solvent.
Claim 4
Dependent Claim
22 words
The process of claim 2 wherein the ethylene oligomerization reaction is conducted in the same polar organic solvent employed for catalyst preparation.
Claim 5
Dependent Claim
32 words
The process of claim 3 wherein the boron hydride reducing agent is an alkali metal borohydride and the molar ratio of alkali metal borohydride to nickel salt is about 1:1 to 10:1.
Claim 6
Dependent Claim
11 words
The process of claim 4 wherein the ligand is an o-diarylphosphinophenol.
Claim 7
Dependent Claim
13 words
The process of claim 5 wherein the nickel salt is a nickel halide.
Claim 8
Dependent Claim
19 words
The process of claim 6 wherein the polar organic solvent is an alkanediol of four to six carbon atoms.
Claim 9
Dependent Claim
31 words
The process of claim 7 wherein the nickel halide is nickel chloride, the ligand is o-diphenylphosphinophenol, the boron hydride reducing agent is sodium borohydride and the polar organic solvent is 1,4-butanediol.
References Cited (Backward Citations)
US3825615A
Cited
US4260844A
Cited
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