Patent US5099050A successfully refreshed from Google Patents.
US5099050A
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US
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Preparation of aluminoxanes
Assignee: Albemarle Corp
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Filing: 1991-04-15
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Granted: 1992-03-24
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Expires: 2011-04-15
Abstract
Abstract Hydrocarbyl aluminoxanes such as methylaluminoxanes are preapred by reacting a hydrocarbylaluminum compound with a hydrate of an alkali metal halide.
Inventors
- 👤 Samuel A. Sangokoya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:56
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/06; C07F5/061; C07F5/066; C07F5/068; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
46 words
A process for preparing methylaluminoxane comprising reacting a solution of trimethylaluminum in an inert hydrocarbon solvent with an alkali metal halide hydrate selected from lithium bromide dihydrate, lithium chloride monohydrate, lithium iodide dihydrate, lithium iodide trihydrate, potassium fluoride dihydrate, and sodium bromide dihydrate, including mixtures thereof.
Claim 2
Dependent Claim
46 words
A process for preparing methylaluminoxane comprising reacting a solution of trimethylaluminum in an inert hydrocarbon solvent with an alkali metal halide hydrate selected from lithium bromide dihydrate, lithium chloride monohydrate, lithium iodide dihydrate, lithium iodide trihydrate, potassium fluoride dihydrate, and sodium bromide dihydrate, including mixtures thereof.
Claim 3
Dependent Claim
22 words
The process of claim 1 wherein said alkali metal halide hydrate is LiCl·1H 2 O, LiBr·2H 2 O, or LiI·2H 2 O.
Claim 4
Dependent Claim
17 words
The process of claim 1 wherein the reaction temperature is from about -20° C. to 60° C.
Claim 5
Dependent Claim
22 words
The process of claim 1 wherein the mole ratio of trimethylaluminum to water in the hydrate is from about 2:1 to 1:4.
Claim 6
Dependent Claim
22 words
The process of claim 4 wherein the mole ratio of trimethylaluminum to water in the hydrate is from about 4:3 to 1:3.5.
Claim 7
Dependent Claim
19 words
The process of claim 4 wherein the mole ratio of trimethylaluminum to water in the hydrate is about 1:1.
Claim 8
Dependent Claim
19 words
A process for preparing a hydrocarbylaluminoxane comprising reacting a hydrocarbylaluminum compound with a hydrate of an alkali metal halide.
Claim 9
Dependent Claim
19 words
A process for preparing a hydrocarbylaluminoxane comprising reacting a hydrocarbylaluminum compound with a hydrate of an alkali metal halide.
Claim 10
Dependent Claim
13 words
A process of claim 7 wherein the hydrate is a lithium halide hydrate.
Claim 11
Dependent Claim
17 words
The process of claim 7 wherein the reaction temperature is from about -20° C. to 60° C.
Claim 12
Dependent Claim
22 words
The process of claim 7 wherein the mole ratio of hydrocarbylaluminum to water in the hydrate is from about 2:1 to 1:4.
Claim 13
Dependent Claim
22 words
The process of claim 10 wherein the mole ratio of hydrocarbylaluminum to water in the hydrate is from about 4:3 to 1:3.5.
Claim 14
Dependent Claim
19 words
The process of claim 10 wherein the mole ratio of hydrocarbylaluminum to water in the hydrate is about 1:1.
Claim 15
Dependent Claim
11 words
The process of claim 7 wherein the hydrocarbylaluminum compound is trimethylaluminum.
Claim 16
Dependent Claim
11 words
The process of claim 7 wherein the hydrocarbylaluminum compound is triisobutylaluminum.
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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) | 1995-03-24 | 1995-09-23 | 1996-03-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-24 | 1999-09-23 | 2000-03-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-24 | 2003-09-23 | 2004-03-24 | $7700.00 | Window Closed / Lapsed |