US4476341A
Expired / Lapsed
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Butene dimerization method
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1983-03-30
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Granted: 1984-10-09
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Expires: 2003-03-30
Abstract
Abstract n-Butene is dimerized with improved conversion using an in situ produced homogeneous catalyst system formed from a nickel compound such as nickel octoate, an organoaluminium compound such as aluminium monoethyl dichloride, the butene and hydrogen.
Inventors
- 👤 Georges M. K. Mathys
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:17
CPC Classifications
C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/26; C07C2/30; C07C2/36; C07C2531/00; C07C2531/02; C07C2531/04; C07C2531/12; C07C2531/14; C07C2531/16; C07C2531/24
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
29 words
A method of producing octenes which comprises dimerising an n-butene using a homogeneous catalyst system formed in situ from a nickel compound, an organo aluminium compound, n-butene and hydrogen.
Claim 2
Independent Claim
29 words
A method of producing octenes which comprises dimerising an n-butene using a homogeneous catalyst system formed in situ from a nickel compound, an organo aluminium compound, n-butene and hydrogen.
Claim 3
Dependent Claim
18 words
A method according to claim 1 wherein the nickel compound is soluble in the butene under dimerisation conditions.
Claim 4
Dependent Claim
31 words
A method according to claim 1 wherein the nickel compound is used in the form of a solution in an inert solvent which is miscible with the butene under dimerisation conditions.
Claim 5
Dependent Claim
31 words
A method according to claim 1, wherein the nickel compound is selected from the group consisting of salts of higher mono- and di-carboxylic acids having from 5 to 20 carbon atoms.
Claim 6
Dependent Claim
13 words
A method according to claim 4, wherein the nickel compound is nickel octoate.
Claim 7
Dependent Claim
48 words
A method according to claim 1, wherein the nickel compound is a coordination complex of an organic phosphine with a nickel halide of general formula NiX 2 (PR 3 ) 2 in which x represents chlorine, bromine or iodine and each R represents an alkyl or aryl group.
Claim 8
Dependent Claim
14 words
A method according to claim 6 wherein the nickel compound is bis-(triethylphosphine) nickel chloride.
Claim 9
Dependent Claim
18 words
A method according to claim 1 wherein the organoaluminium compound is soluble in the butene under dimerisation conditions.
Claim 10
Dependent Claim
31 words
A method according to claim 1 wherein the organoaluminium compound is used in the form of a solution in an inert solvent which is miscible with the butene under dimerisation conditions.
Claim 11
Dependent Claim
14 words
A method according to claim 1 wherein the organoaluminium compound is aluminium monoethyl dichloride.
Claim 12
Dependent Claim
22 words
A method according claim 1 wherein the molar ratio of aluminium compound to nickel compound is in the range 10:1 to 100:1.
Claim 13
Dependent Claim
26 words
A method according to claim 1 wherein the ratio of nickel (as metal, in grams) to butene (in mols) is in the range 0.001:1 to 0.1:1.
Claim 14
Dependent Claim
21 words
A method according to claim 1 wherein the hydrogen is dissolved in the butene at saturation level under the dimerisation conditions.
Claim 15
Dependent Claim
20 words
A method according to claim 1 wherein the dimerisation is performed at a temperature of from 20° to 70° C.
Claim 16
Dependent Claim
21 words
A method according to claim 1 wherein the dimerisation is performed at a pressure of from 2 to 20 bars abs.
Claim 17
Dependent Claim
16 words
A method according to claim 1 wherein the n-butene used contains a contaminant such as isobutylene.
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) | 1987-10-09 | 1988-04-09 | 1988-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-09 | 1992-04-09 | 1992-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-09 | 1996-04-09 | 1996-10-09 | $7700.00 | Window Closed / Lapsed |