US5041583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of aluminoxanes
Assignee: Albemarle Corp
•
Filing: 1990-06-28
•
Granted: 1991-08-20
•
Expires: 2010-06-28
Abstract
Abstract Hydrocarbylaluminoxanes such as methylaluminoxanes are prepared by reacting a hydrocarbylaluminum compound with a hydrate of an alkali or alkaline earth metal hydroxide.
Inventors
- 👤 Samuel A. Sangokoya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:06
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/06; C07F5/061; C07F5/066; C07F5/068
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
22 words
A process for preparing a hydrocarbylaluminoxane comprising reacting a hydrocarbylaluminum compound with a hydrate of an alkali or alkaline earth metal hydroxide.
Claim 2
Dependent Claim
22 words
A process for preparing a hydrocarbylaluminoxane comprising reacting a hydrocarbylaluminum compound with a hydrate of an alkali or alkaline earth metal hydroxide.
Claim 3
Dependent Claim
12 words
The process of claim 1 wherein the hydrate is LiOH.1H 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
19 words
The process of claim 1 wherein the mole ratio of hydrocarbylaluminum to hydrate ranges from about 2:1 to 1:2.
Claim 6
Dependent Claim
16 words
The process of claim 4 wherein the mole ratio of hydrocarbylaluminum to hydrate is about 2:1.
Claim 7
Dependent Claim
16 words
The process of claim 4 wherein the mole ratio of hydrocarbylaluminum to hydrate is about 1:1.
Claim 8
Dependent Claim
40 words
A process for preparing methylaluminoxane comprising reacting a solution of trimethylaluminum in an inert hydrocarbon solvent with an alkali or alkaline earth metal hydroxide hydrate selected from lithium, sodium, potassium, barium, calcium, magnesium, and cesium hydroxide hydrate including mixtures thereof.
Claim 9
Dependent Claim
40 words
A process for preparing methylaluminoxane comprising reacting a solution of trimethylaluminum in an inert hydrocarbon solvent with an alkali or alkaline earth metal hydroxide hydrate selected from lithium, sodium, potassium, barium, calcium, magnesium, and cesium hydroxide hydrate including mixtures thereof.
Claim 10
Dependent Claim
12 words
The process of claim 7 wherein the hydrate is LiOH.1H 2 O.
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
19 words
The process of claim 7 wherein the mole ratio of trimethylaluminum to hydrate ranges from about 2:1 to 1:2.
Claim 13
Dependent Claim
16 words
The process of claim 10 wherein the mole ratio of trimethylaluminum to hydrate is about 2:1.
Claim 14
Dependent Claim
16 words
The process of claim 10 wherein the mole ratio of trimethylaluminum to hydrate is about 1:1.
References Cited (Backward Citations)
US4404344A
Cited
DE3240383A1
Cited
US4544762A
Cited
EP0208561A2
Cited
US4665208A
Cited
WO1989002453A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1994-08-19 | 1995-02-18 | 1995-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-08-19 | 1999-02-18 | 1999-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-08-19 | 2003-02-18 | 2003-08-20 | $7700.00 | Window Closed / Lapsed |