Patent US3676523A successfully refreshed from Google Patents.
US3676523A
Expired / Lapsed
US
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Alpha-olefin production
Assignee: Shell USA Inc
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Filing: 1971-07-16
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Granted: 1972-07-11
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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 and (3) an o-dihydrocarbylphosphinobenzoic acid or alkali metal salt thereof.
Inventors
- 👤 Ronald F Mason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:29
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/26; C07C2/36; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/14; C07C2531/16; C07C2531/24; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
50 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* to 50*C and the nickel salt has a solubility of at least 0.01 mole per liter in said polar organic solvent.
Claim 2
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 3
Dependent Claim
31 words
The process of claim 3 wherein 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 4
Dependent Claim
17 words
The process of claim 4 wherein the ligand is an o-diarylphosphino-benzoic acid or alkali metal salt thereof.
Claim 5
Dependent Claim
13 words
The process of claim 5 wherein the nickel salt is a nickel halide.
Claim 6
Dependent Claim
19 words
The process of claim 6 wherein the polar organic solvent is an alkanediol of four to six carbon atoms.
Claim 7
Dependent Claim
37 words
The process of claim 7 wherein the nickel halide is nickel chloride, the ligand is o-diphenylphosphinobenzoic acid or alkali metal salt thereof, the boron hydride reducing agent is sodium borohydride and the polar organic solvent is 1,4-butanediol.
Claim 8
Dependent Claim
17 words
The process of claim 4 wherein the ligand is an arylcycloalkylbenzoic acid or alkali metal salt thereof.
Claim 9
Dependent Claim
35 words
The process of claim 9 wherein the polar organic solvent is an alkanediol of four to six carbon atoms, the nickel salt is a nickel halide and the boron hydride reducing agent is sodium borohydride.
References Cited (Backward Citations)
US3151155A
Cited
US3558736A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |