US5206401A
Expired / Lapsed
US
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Method of making alkylaluminoxane
Assignee: Akzo Chemicals Inc
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Filing: 1991-06-07
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Granted: 1993-04-27
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Expires: 2011-06-07
Abstract
Abstract The efficient production of alkylaluminoxane by the reaction of water, e.g., in the form of atomized water, and trialkylaluminum, e.g., trimethylaluminum, in an organic solvent medium can be achieved using a preformed alkylaluminoxane as a reaction moderator in the reaction mixture.
Inventors
- 👤 Dennis L. Deavenport
- 👤 James T. Hodges, III
- 👤 Dennis B. Malpass
- 👤 Nam H. Tran
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 18:02
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/06; C07F5/061; C07F5/066; C07F5/068
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
41 words
In a process for the production of alkylaluminoxane by the reaction of water and a trialkylaluminum compound in an organic solvent medium, wherein the improvement comprises conducting the reaction in the presence of an aluminoxane which functions as a reaction moderator.
Claim 2
Dependent Claim
41 words
In a process for the production of alkylaluminoxane by the reaction of water and a trialkylaluminum compound in an organic solvent medium, wherein the improvement comprises conducting the reaction in the presence of an aluminoxane which functions as a reaction moderator.
Claim 3
Dependent Claim
12 words
A process as claimed in claim 1 wherein the trialkylaluminum is trimethylaluminum.
Claim 4
Dependent Claim
34 words
A process as claimed in claim 1 wherein the water and trialkylaluminum are reacted with one another in a two-stage reaction with the water to trialkylaluminum molar ratio being higher in the second state.
Claim 5
Dependent Claim
34 words
A process as claimed in claim 2 wherein the water and trialkylaluminum are reacted with one another in a two-stage reaction with the water to trialkylaluminum molar ratio being higher in the second state.
Claim 6
Dependent Claim
38 words
A process as claimed in claim 1 wherein the aluminoxane, which functions as a reaction moderator, is formed in situ during the initial stage of the process by the reaction of water, in highly diluted form, and trialkylaluminum.
Claim 7
Dependent Claim
33 words
A process as claimed in claim 2 wherein the preformed aluminoxane is formed in situ during the initial stage of the process by the reaction of water, in highly diluted form, and trialkylaluminum.
Claim 8
Dependent Claim
33 words
A process as claimed in claim 3 wherein the preformed alumioxane is formed in situ during the initial stage of the process by the reaction of water, in highly diluted form, and trialkylaluminum.
Claim 9
Dependent Claim
33 words
A process as claimed in claim 4 wherein the preformed aluminoxane is formed in situ during the initial stage of the process by the reaction of water, in highly diluted form, and trialkylaluminum.
Claim 10
Dependent Claim
43 words
A process as claimed in claim 1 wherein the water and trialkylaluminum are reacted with one another in a one-stage reaction with the water to trialkylaluminum molar being held substantially constant through the reaction until the desired final concentration of product is achieved.
Claim 11
Dependent Claim
43 words
A process as claimed in claim 2 wherein the water and trialkylaluminum are reacted with one another in a one-stage reaction with the water to trialkylaluminum molar being held substantially constant through the reaction until the desired final concentration of product is achieved.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-04-26 | 1996-10-26 | 1997-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-04-26 | 2000-10-26 | 2001-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-04-26 | 2004-10-26 | 2005-04-27 | $7700.00 | Window Closed / Lapsed |