US5015749A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of polyhydrocarbyl-aluminoxanes
Assignee: Dow Chemical Co
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Filing: 1989-09-07
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Granted: 1991-05-14
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Expires: 2009-09-07
Abstract
Abstract An improved process for the preparation of aluminoxanes comprising contacting an aluminoxane precursor such as a hydrocarbyl substituted aluminum compound with a porous organic or inorganic aqueous imbiber material containing water sorbed or imbibed therein.
Inventors
- 👤 Gregory F. Schmidt
- 👤 Dennis A. Hucul
- 👤 Richard E. Campbell, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:19
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: 12
Claim 1
Independent Claim
50 words
A process for the preparation of polyhydrocarbylaluminoxanes comprising contacting under reaction conditions that are conducive to the preparation of polyhydrocarbylaluminoxanes a polyhydrocarbylaluminoxane precursor and a porous organic or inorganic aqueous imbiber material having a pore size of from about 15 to about 10,000 Angstroms containing water imbibed or sorbed therein.
Claim 2
Dependent Claim
50 words
A process for the preparation of polyhydrocarbylaluminoxanes comprising contacting under reaction conditions that are conducive to the preparation of polyhydrocarbylaluminoxanes a polyhydrocarbylaluminoxane precursor and a porous organic or inorganic aqueous imbiber material having a pore size of from about 15 to about 10,000 Angstroms containing water imbibed or sorbed therein.
Claim 3
Dependent Claim
16 words
A process according to claim 1, wherein the polyhydrocarbylaluminoxane precursor is a hydrocarbyl substituted aluminum compound.
Claim 4
Dependent Claim
44 words
A process according to claim 1, wherein the polyhydrocarbylaluminoxane precursor is selected from the group consisting of trihydrocarbylaluminum compounds having from 1 to 12 carbons in each hydrocarbyl group and polyhydrocarbylaluminoxanes having a molecular weight or structure different from that prepared by the process.
Claim 5
Dependent Claim
12 words
A process according to claim 3, wherein the trihydrocarbylaluminum compound is trimethylaluminum.
Claim 6
Dependent Claim
19 words
A process according to claim 1, wherein the porous aqueous imbiber material is high surface area silica or alumina.
Claim 7
Dependent Claim
24 words
A process according to claim 1, wherein the porous aqueous imbiber material has a pore size of from about 40 to about 2,000 Angstroms.
Claim 8
Dependent Claim
18 words
A process according to claim 1, wherein the reaction is conducting in the presence of an inert diluent.
Claim 9
Dependent Claim
12 words
A process according to claim 7, wherein the inert diluent in toluene.
Claim 10
Dependent Claim
27 words
A continuous process according to claim 1, wherein after preparation of the polyhydrocarbylaluminoxane the porous aqueous imbiber material is recovered, regenerated and reused to prepare a polyhydrocarbylaluminoxane.
Claim 11
Dependent Claim
64 words
A continuous process for the preparation of polyhydrocarbylaluminoxanes comprising (a) contacting under reaction conditions that are conducive to the preparation of polyhydrocarbylaluminoxanes, a polyhydrocarbylaluminoxane precursor and a porous organic or inorganic aqueous imbiber material containing water imbibed or sorbed therein; (b) recovering the polyhydrocarbylaluminoxane and porous aqueous imbiber material; (c) regenerating the porous aqueous imbiber material; and (d) repeating steps (a), (b) and (c).
Claim 12
Dependent Claim
64 words
A continuous process for the preparation of polyhydrocarbylaluminoxanes comprising (a) contacting under reaction conditions that are conducive to the preparation of polyhydrocarbylaluminoxanes, a polyhydrocarbylaluminoxane precursor and a porous organic or inorganic aqueous imbiber material containing water imbibed or sorbed therein; (b) recovering the polyhydrocarbylaluminoxane and porous aqueous imbiber material; (c) regenerating the porous aqueous imbiber material; and (d) repeating steps (a), (b) and (c).
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) | 1994-05-13 | 1994-11-12 | 1995-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-05-13 | 1998-11-12 | 1999-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-05-13 | 2002-11-12 | 2003-05-14 | $7700.00 | Window Closed / Lapsed |