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US4665208A
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Process for the preparation of alumoxanes
Assignee: ExxonMobil Chemical Patents Inc
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Filing: 1985-07-11
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Granted: 1987-05-12
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Expires: 2005-07-11
Abstract
Abstract A process for the preparation of hydrocarbylalumoxanes comprising oligomeric, linear and/or cyclic hydrocarbylalumoxanes, which comprises contacting a hydrocarbylaluminum dissolved in an inert dry organic liquid with a hydrated salt of a metal which is not reduced during contact with the trihydrocarbylaluminum at temperatures between -30° C. and 110° C.
Inventors
- 👤 Howard C. Welborn, Jr.
- 👤 Erik G. M. Tornqvist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:20
CPC Classifications
C; C08; C08G; C08G79/00; C08G79/10; C07; C07F; C07F5/00; C07F5/06; C07F5/061; C07F5/066; C07F5/068; C08F; C08F10/00
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
70 words
A process for the preparation of oligomeric, linear and/or cyclic hydrocarbylalumoxane, which comprises reacting at temperatures between -30° C. and 110° C. and a hydrocarbylaluminum dissolved in an inert dry organic liquid with a hydrated salt of a metal selected from FeSO 4 .7H 2 O, MSO 4 .7H 2 O, ZnSO 4 .7H 2 O, Na 2 SO 4 .10H 2 O, Na 3 PO 4 .12H 2 O.
Claim 2
Dependent Claim
70 words
A process for the preparation of oligomeric, linear and/or cyclic hydrocarbylalumoxane, which comprises reacting at temperatures between -30° C. and 110° C. and a hydrocarbylaluminum dissolved in an inert dry organic liquid with a hydrated salt of a metal selected from FeSO 4 .7H 2 O, MSO 4 .7H 2 O, ZnSO 4 .7H 2 O, Na 2 SO 4 .10H 2 O, Na 3 PO 4 .12H 2 O.
Claim 3
Dependent Claim
12 words
The process in accordance with claim 1 wherein the trihydrocarbylaluminum is trialkylaluminum.
Claim 4
Dependent Claim
12 words
The process in accordance with claim 2 wherein the trialkylaluminum is trimethylaluminum.
Claim 5
Dependent Claim
18 words
The process in accordance with claim 1 wherein the inert solvent is elected from aliphatic or aromatic solvents.
Claim 6
Dependent Claim
17 words
The process in accordance with claim 4 wherein the solvents are selected from toluene, hexane, and heptane.
Claim 7
Dependent Claim
17 words
The process in accordance with claim 1 wherein the hydrated salt is FeSO 4 .7H 2 O.
Claim 8
Dependent Claim
30 words
The process in accordance with claim 1 wherein the molar ratio between the trihydrocarbylaluminum and the hydrated salt calculated on the amount of water is about 1:0.8 to about 1:2.
Claim 9
Dependent Claim
21 words
The process in accordance with claim 6 wherein the motor ratio between the trihydrocarbylaluminum and the hydrated metal salt is 1:1.4.
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) | 1990-05-11 | 1990-11-10 | 1991-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-05-11 | 1994-11-10 | 1995-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-05-11 | 1998-11-10 | 1999-05-12 | $7700.00 | Window Closed / Lapsed |