US4032590A
Expired / Lapsed
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Oligomerization of ethylene
Assignee: Imperial Chemical Industries Ltd
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Filing: 1975-08-18
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Granted: 1977-06-28
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Expires: 1995-08-18
Abstract
Abstract Ethylene is oligomerized to predominantly α-olefins, principally butene-1 with some hexene-1, by contacting it with a catalyst comprising the product of reacting a weak field ligand complex of a Group VIII metal with a particulate inorganic oxide possessing sufficient Bronsted acidity to displace one of the ligands from the complex, in the presence of a Group I to III metal hydrocarbyl. Nickel and cobalt are preferred metals, typical weak field ligands being acetylacetonate and carboxylate. Preferred inorganic oxide supports are aluminium and zirconium phosphates. Selectivities of >90% may be obtained.
Inventors
- 👤 David Robert Burnham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:26
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/02; B01J31/12; B01J31/122; B01J27/00; B01J27/14; B01J27/185; B01J27/1853; B01J27/1856; B01J31/14; B01J31/143; B01J31/16; B01J31/1616; B01J31/1625; B01J31/22; B01J31/2204; B01J31/2208; B01J31/2226; B01J31/223; B01J31/2234; B01J37/00; B01J37/02; B01J37/0201; B01J37/0203; C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/26; C07C2/32; B01J2231/00; B01J2231/20; B01J2531/00; B01J2531/80; B01J2531/82; B01J2531/824; B01J2531/84; B01J2531/845; B01J2531/847; B01J31/0234; B01J31/0255; B01J31/0269; B01J31/18; B01J31/1845; C07C2521/00; C07C2521/02; C07C2521/04; C07C2521/06; C07C2521/08; C07C2527/00; C07C2527/14; C07C2527/16; C07C2527/167; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/14; C07C2531/16; C07C2531/22
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
88 words
A process for the oligomerisation of ethylene in which the ethylene is contacted with a catalyst which is the reaction product of a weak field ligand complex of a metal of Group VIII of the Periodic Table and an inorganic oxide support material which contain other elements to impart sufficient Bronsted acidity to said support to displace at least one of the ligands attached to the said Group VIII metal, in the presence of a hydrocarbyl of a metal of Groups I to III of the Periodic Table.
Claim 2
Dependent Claim
88 words
A process for the oligomerisation of ethylene in which the ethylene is contacted with a catalyst which is the reaction product of a weak field ligand complex of a metal of Group VIII of the Periodic Table and an inorganic oxide support material which contain other elements to impart sufficient Bronsted acidity to said support to displace at least one of the ligands attached to the said Group VIII metal, in the presence of a hydrocarbyl of a metal of Groups I to III of the Periodic Table.
Claim 3
Dependent Claim
21 words
A process as claimed in claim 1 in which the weak field ligand complex is a compound of nickel or cobalt.
Claim 4
Dependent Claim
31 words
A process as claimed in claim 1 in which the weak field ligand complex is a β-diketone, a β-ketocarboxylic acid ester or a salt of a saturated or unsaturated carboxylic acid.
Claim 5
Dependent Claim
24 words
A process as claimed in claim 3 in which the complex is selected from nickel acetyacetonate, nickel 4-cyclohexylbutyrate, cobalt (II) acetylacetonate and palladium acetylacetonate.
Claim 6
Dependent Claim
14 words
A process as claimed in claim 1 in which said other element is phosphorus.
Claim 7
Dependent Claim
28 words
A process as claimed in claim 5 in which the support material is selected from zirconium phosphate, aluminium phosphate and silica which has been pretreated with phosphorus trichloride.
Claim 8
Dependent Claim
21 words
A process as claimed in claim 1 in which the Group I to III metal hydrocarbyl compound is an aluminium trialkyl.
Claim 9
Dependent Claim
31 words
A process as claimed in claim 1 in which the molar ratio of Group I to III metal hydrocarbyl compound to Group VIII metal is in the range 20 to 1.
Claim 10
Dependent Claim
30 words
An oligomerisation process as claimed in claim 1 in which the reaction temperature is in the range 0° to 50° and the reaction pressure is not more than 50 bars.
Claim 11
Dependent Claim
17 words
A mixture of predominantly α-olefin ethylene oligomers whenever prepared by a process as claimed in claim 1.
Claim 12
Dependent Claim
19 words
A process as claimed in claim 1, wherein said support is an inorganic oxide, inorganic phosphate, or mixtures thereof.
Claim 13
Dependent Claim
20 words
A process according to claim 1, wherein said element is in chemical combination with the oxide of the support material.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-06-27 | 1980-12-27 | 1981-06-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-27 | 1984-12-27 | 1985-06-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-27 | 1988-12-27 | 1989-06-28 | $7700.00 | Window Closed / Lapsed |