US5084585A
Expired / Lapsed
US
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Process for preparation of aluminoxane
Assignee: Dow Chemical Co
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Filing: 1991-01-09
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Granted: 1992-01-28
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Expires: 2011-01-09
Abstract
Abstract The present invention relates to a process for preparing aluminoxane which comprises reacting an organoaluminum compound and water in a solvent system containing solvent having a higher boiling point than that of the organoaluminum compound, or reacting an organoaluminum compound and water, and then adding a solvent system containing the solvent having a higher boiling point than that of the organoaluminum compound to the reaction mixture; and thereafter condensing the resulting reaction mixture under atmospheric pressure or reduced pressure.
Inventors
- 👤 Hiroshi Maezawa
- 👤 Norio Tomotsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:31
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/06; C07F5/061; C07F5/066; C07F5/068; C08; C08F; C08F10/00; Y; Y10; Y10S; Y10S526/00; Y10S526/943
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
61 words
A process for preparing aluminoxane which comprises reacting an organoaluminum compound and water in a solvent having a higher boiling point than that of the organoaluminum compound to form a resulting reaction mixture having an initial weight, and condensing the resulting reaction mixture under reduced pressure until the weight of the resulting mixture becomes 1/1.5 to 1/100 of the initial weight.
Claim 2
Dependent Claim
61 words
A process for preparing aluminoxane which comprises reacting an organoaluminum compound and water in a solvent having a higher boiling point than that of the organoaluminum compound to form a resulting reaction mixture having an initial weight, and condensing the resulting reaction mixture under reduced pressure until the weight of the resulting mixture becomes 1/1.5 to 1/100 of the initial weight.
Claim 3
Dependent Claim
37 words
The process as claimed in claim 1, wherein the organoaluminum compound is an organic compound represented by the general formula: AlR 1 3 l (wherein R 1 is an alkyl group having 1 to 8 carbon atoms).
Claim 4
Dependent Claim
16 words
The process as claimed in claim 1, wherein the organoaluminum compound is trimethylaluminum, triethylaluminum or triisobutylaluminum.
Claim 5
Dependent Claim
16 words
The process as claimed in claim 1, wherein the solvent is aromatic hydrocarbon or aliphatic hydrocarbon.
Claim 6
Dependent Claim
19 words
The process as claimed in claim 1, wherein the organoaluminum compound is trimethylaluminum and the solvent is aromatic hydrocarbon.
Claim 7
Dependent Claim
28 words
The process as claimed in claim 1, wherein the reaction mixture is condensed until the weight of the resulting mixture becomes 1/2 to 1/10 of the initial weight.
Claim 8
Dependent Claim
108 words
A process for preparing aluminoxane which comprises reacting an organoaluminum compound and water in a solvent system containing a solvent having a higher boiling point than that of the organoaluminum compound to form a resulting reaction mixture having an initial weight, and condensing the resulting reaction mixture under reduced pressure until the weight of the resulting mixture becomes 1/15 to 1/100 of the initial weight and wherein the solvent system is a mixture of not less than 10% by weight of a solvent having a higher boiling point than that of the organoaluminum compound and a solvent having a lower boiling point than that of the organoaluminum compound.
Claim 9
Dependent Claim
108 words
A process for preparing aluminoxane which comprises reacting an organoaluminum compound and water in a solvent system containing a solvent having a higher boiling point than that of the organoaluminum compound to form a resulting reaction mixture having an initial weight, and condensing the resulting reaction mixture under reduced pressure until the weight of the resulting mixture becomes 1/15 to 1/100 of the initial weight and wherein the solvent system is a mixture of not less than 10% by weight of a solvent having a higher boiling point than that of the organoaluminum compound and a solvent having a lower boiling point than that of the organoaluminum compound.
Claim 10
Dependent Claim
67 words
A process for preparing aluminoxane which comprises reacting an organoaluminum compound and water, adding a solvent system containing solvent having a higher boiling point than that of the organoaluminum compound to the above obtained reaction mixture to form a solution having an initial weight, and condensing the resulting solution under reduced pressure until the weight of the resulting solution becomes 1/1.5 to 1/100 of the initial weight.
Claim 11
Dependent Claim
67 words
A process for preparing aluminoxane which comprises reacting an organoaluminum compound and water, adding a solvent system containing solvent having a higher boiling point than that of the organoaluminum compound to the above obtained reaction mixture to form a solution having an initial weight, and condensing the resulting solution under reduced pressure until the weight of the resulting solution becomes 1/1.5 to 1/100 of the initial weight.
Claim 12
Dependent Claim
36 words
The process as claimed in claim 8, wherein the organoaluminum compound is an organic compound represented by the general formula: AlR 1 3 (wherein R 1 is an alkyl group having 1 to 8 carbon atoms).
Claim 13
Dependent Claim
16 words
The process as claimed in claim 8, wherein the organoaluminum compound is trimethylaluminum, triethylaluminum or triisobutylaluminum.
Claim 14
Dependent Claim
16 words
The process as claimed in claim 8, wherein the solvent is aromatic hydrocarbon or aliphatic hydrocarbon.
Claim 15
Dependent Claim
19 words
The process as claimed in claim 8, wherein the organoaluminum compound is trimethylaluminum and the solvent is aromatic hydrocarbon.
Claim 16
Dependent Claim
28 words
The process as claimed in claim 8, wherein the reaction mixture is condensed until the weight of the resulting solution becomes 1/2 to 1/10 of the initial weight.
Claim 17
Dependent Claim
53 words
The process as claimed in anyone of claim 8 to 13, wherein the solvent system is a mixture of not less than 10% by weight of a solvent having a higher boiling point than that of the organoaluminum compound and a solvent having a lower boiling point than that of the organoaluminum compound.
Claim 18
Dependent Claim
12 words
The process of claim 1, wherein the solvent is an aliphatic hydrocarbon.
Claim 19
Dependent Claim
12 words
The process of claim 1, wherein the solvent is propylbenzene or cumene.
Claim 20
Dependent Claim
13 words
The process of claim 1 wherein the solvent is octane, nonane or decane.
Claim 21
Dependent Claim
13 words
The process of claim 1, 7 or 8 wherein the solvent is ethylbenzene.
Claim 22
Dependent Claim
15 words
The process of claim 1, 7 or 8 wherein the solvent is xylene or p-xylene.
Claim 23
Dependent Claim
14 words
The process of claim 1, 7 or 8 wherein the solvent is isopropyl benzene.
Claim 24
Dependent Claim
22 words
The process of claim 7 wherein the reaction mixture is condensed until a weight of the resulting mixture becomes 1/2 to 1/10.
Claim 25
Dependent Claim
85 words
A process for preparing aluminoxane which comprises reacting an organoaluminum compound and water in a solvent system containing solvent having a higher boiling point than that of the organoaluminum compound, and condensing the resulting reaction mixture under atmospheric pressure or reduced pressure and wherein the solvent system is a mixture of not less than 10% by weight of a solvent having a higher boiling point than that of the organoaluminum compound and a solvent having a lower boiling point than that of the organoaluminum compound.
Claim 26
Dependent Claim
85 words
A process for preparing aluminoxane which comprises reacting an organoaluminum compound and water in a solvent system containing solvent having a higher boiling point than that of the organoaluminum compound, and condensing the resulting reaction mixture under atmospheric pressure or reduced pressure and wherein the solvent system is a mixture of not less than 10% by weight of a solvent having a higher boiling point than that of the organoaluminum compound and a solvent having a lower boiling point than that of the organoaluminum compound.
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) | 1995-01-27 | 1995-07-29 | 1996-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-27 | 1999-07-29 | 2000-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-27 | 2003-07-29 | 2004-01-28 | $7700.00 | Window Closed / Lapsed |