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Patent US4730072A successfully refreshed from Google Patents.
US4730072A
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Process for preparing aluminoxanes
Assignee: Shell USA Inc
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Filing: 1986-08-15
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Granted: 1988-03-08
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Expires: 2006-08-15
Abstract
Abstract This invention relates to a process for preparing aluminoxines from trialkyl aluminum compounds and an water dispersion produced using a high speed, high shear-inducing impeller.
Inventors
- 👤 Galeon W. Schoenthal
- 👤 Lynn H. Slaugh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:49
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/06; C07F5/061; C07F5/066; C07F5/068; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
58 words
A process for preparing aluminoxanes which comprises mixing a first solution of a trialkyl aluminum compound in a liquid, dry, inert hydrocarbon solvent with a second solution of a liquid, inert, hydrocarbon solvent having water dispersed therein by using a high speed, high shear-inducing impeller wherein the trialkyl aluminum compound and the water react to produce an aluminoxane.
Claim 2
Dependent Claim
58 words
A process for preparing aluminoxanes which comprises mixing a first solution of a trialkyl aluminum compound in a liquid, dry, inert hydrocarbon solvent with a second solution of a liquid, inert, hydrocarbon solvent having water dispersed therein by using a high speed, high shear-inducing impeller wherein the trialkyl aluminum compound and the water react to produce an aluminoxane.
Claim 3
Dependent Claim
21 words
The process of claim 1 wherein the alkyl moiety of trialkyl aluminum compound is a C 1 -C 5 alkyl group.
Claim 4
Dependent Claim
13 words
The process of claim 2 wherein the alkyl moiety is methyl or ethyl.
Claim 5
Dependent Claim
20 words
The process of claim 1 wherein the molar ratio of trialkylaluminum to water ranges from about 0.65:1 to about 2:1.
Claim 6
Dependent Claim
16 words
The process of claim 4 wherein the molar ratio ranges from about 0.75:1 to about 1.25.
Claim 7
Dependent Claim
12 words
The process of claim 5 wherein the molar ratio is about 1:1.
Claim 8
Dependent Claim
41 words
The process of claims 1, 2, 3, 4, 5 or 6 carried out at a temperature ranging from about -100° C. to about 50° C. and wherein the impeller is operated at a speed greater than about 400 revolutions per minute.
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) | 1991-03-08 | 1991-09-07 | 1992-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-08 | 1995-09-07 | 1996-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-08 | 1999-09-07 | 2000-03-08 | $7700.00 | Window Closed / Lapsed |