US4615998A
Expired / Lapsed
US
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Catalyst suitable for synthesizing 1-butene by dimerization of ethylene
Assignee: IFP Energies nouvelles
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Filing: 1985-04-30
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Granted: 1986-10-07
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Expires: 2005-04-30
Abstract
Abstract A catalyst is formed by reacting, in a hydrocarbon medium, a trialkylaluminum with a mixture of an alkyl titanate with an ether. The activity and the selectivity are improved when adding the trialkylaluminum to a pre-formed mixture of alkyl titanate with ether.
Inventors
- 👤 Nhuong Le Quan
- 👤 Daniel Cruypelinck
- 👤 Dominique Commereuc
- 👤 Yves Chauvin
- 👤 Gerard Leger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:05
CPC Classifications
B; B01; B01J; B01J31/00; B01J31/16; B01J31/22; B01J31/2204; B01J31/2208; B01J31/02; B01J31/0201; B01J31/0211; B01J31/0212; B01J31/12; B01J31/14; B01J31/143; C; C07; C07C; C07C2/00; C07C2/02; C07C2/04; C07C2/06; C07C2/08; C07C2/26; C07C2/30; B01J2531/00; B01J2531/40; B01J2531/46; C07C2531/00; C07C2531/02; C07C2531/12; C07C2531/14
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
53 words
A catalyst suitable for the dimerization of ethylene and produced by reacting a preformed mixture consisting essentially of an alkyl titanate and an ether, in a molar ratio of ether/titanate from 0.5:1 to 10:1, with an aluminum compound of formula AlR 3 or AlR 2 H, wherein each R is a hydrocarbyl radical.
Claim 2
Dependent Claim
53 words
A catalyst suitable for the dimerization of ethylene and produced by reacting a preformed mixture consisting essentially of an alkyl titanate and an ether, in a molar ratio of ether/titanate from 0.5:1 to 10:1, with an aluminum compound of formula AlR 3 or AlR 2 H, wherein each R is a hydrocarbyl radical.
Claim 3
Dependent Claim
23 words
A catalyst according to claim 1, wherein the molar ratio of the ether to the alkyl titanate is from about 1:1 to 3:1.
Claim 4
Dependent Claim
20 words
A catalyst according to claim 1 wherein the ether is diethylether, isopropylether, dibutylether, methyltert-butylether, tetrahydrofuran, 1,4-dioxane, dihydropyran or ethyleneglycol dimethylether.
Claim 5
Dependent Claim
11 words
A catalyst according to claim 3, wherein the ether is 1,4-dioxane.
Claim 6
Dependent Claim
11 words
A catalyst according to claim 3, wherein the ether is tetrahydrofuran.
Claim 7
Dependent Claim
32 words
A catalyst according to claim 1, wherein the reaction of the preformed mixture of alkyl titanate and ether with the aluminum compound is performed at a temperature from -10° to +45° C.
Claim 8
Dependent Claim
21 words
A catalyst according to claim 6, wherein the admixed catalyst components are maintained at a temperature from -10° to +45° C.
Claim 9
Dependent Claim
23 words
A catalyst according to claim 1, wherein the molar ratio of the aluminum compound to the titanium compound is from 1:1 to 20:1.
Claim 10
Dependent Claim
24 words
A catalyst according to claim 1, wherein the alkyl titanate is of the formula Ti(OR') 4 wherein R' is alkyl of 2-8 carbon atoms.
Claim 11
Dependent Claim
24 words
A catalyst according to claim 3, wherein the alkyl titanate is of the formula Ti(OR') 4 wherein R' is alkyl of 2-8 carbon atoms.
Claim 12
Dependent Claim
14 words
A catalyst according to claim 1, wherein R is alkyl of 2-6 carbon atoms.
Claim 13
Dependent Claim
14 words
A catalyst according to claim 9, wherein R is alkyl of 2-6 carbon atoms.
Claim 14
Dependent Claim
14 words
A catalyst according to claim 10, wherein R is alkyl of 2-6 carbon atoms.
Claim 15
Dependent Claim
33 words
A catalyst according to claim 1, wherein the alkyl titanate is isopropyl or n-butyl titanate, the aluminum compound is triethylaluminum and the ether is dihydropyran, tetrahydrofuran, ethylene glycol dimethyl ether or 1,4 dioxane.
References Cited (Backward Citations)
US4312783A
Cited
US4370456A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-10-06 | 1990-04-07 | 1990-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-10-06 | 1994-04-07 | 1994-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-10-06 | 1998-04-07 | 1998-10-07 | $7700.00 | Window Closed / Lapsed |