US3686351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Alpha-olefin production
Assignee: Shell USA Inc
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Filing: 1971-07-16
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Granted: 1972-08-22
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Expires: 1991-07-16
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 (3) a phosphinooacetic acid or alkali metal salt thereof.
Inventors
- 👤 Ronald F Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:29
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/12; B01J31/14; B01J31/146; B01J31/16; B01J31/22; B01J31/2204; B01J31/2208; B01J31/2221; B01J31/2226; B01J31/2247; C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/26; C07C2/36; B01J2231/00; B01J2231/20; B01J2531/00; B01J2531/80; B01J2531/84; B01J2531/847; B01J31/26; B01J31/28; B01J31/30; C07C2527/00; C07C2527/06; C07C2527/128; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/14; C07C2531/16; C07C2531/24
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
32 words
The process of claim 1 wherein the catalyst composition is produced in the presence of about 10 psig to 1,500 psig of ethylene at a temperature of about 0* to 50* C.
Claim 2
Dependent Claim
24 words
The process of claim 2 wherein the nickel salt has a solubility of at least 0.01 mole per liter in said polar organic solvent.
Claim 3
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 4
Dependent Claim
37 words
The process of claim 4 wherein boron hydride reducing agent is an alkali metal borohydride, the molar ratio of alkali metal borohydride to nickel salt is about 1:1 to 10:1 and M is hydrogen, sodium or potassium.
Claim 5
Dependent Claim
32 words
The process of claim 5 wherein the R group independently is a hydrocarbon aromatic group of six to 10 carbon atoms or a cycloalkyl group of from five to seven carbon atoms.
Claim 6
Dependent Claim
13 words
The process of claim 6 wherein the nickel salt is a nickel halide.
Claim 7
Dependent Claim
19 words
The process of claim 7 wherein the polar organic solvent is an alkanediol of four to six carbon atoms.
Claim 8
Dependent Claim
30 words
The process of claim 8 wherein the nickel halide is nickel chloride, R is phenyl, the boron hydride reducing agent is sodium borohydride and the polar organic solvent is 1,4-butanediol.
Claim 9
Dependent Claim
30 words
The process of claim 8 wherein the nickel halide is nickel chloride, R is cyclohexyl, the boron hydride reducing agent is sodium borohydride and the polar organic solvent is 1,4-butanediol.
References Cited (Backward Citations)
US3131155A
Cited
US3558736A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |