Patent US4968827A successfully refreshed from Google Patents.
US4968827A
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Alkylaluminoxane process
Assignee: Ethyl Corp
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Filing: 1989-06-06
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Granted: 1990-11-06
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Expires: 2009-06-06
Abstract
Abstract Hydrocarbylaluminoxanes are made by introducing liquid water into the free space above an inert hydrocarbon solution of a hydrocarbyl aluminum compound (e.g. trimethyl aluminum) with intensive agitation while maintaining the reaction temperature at -80° C. up to -10° C.
Inventors
- 👤 Robert L. Davis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 07:34
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/06; C07F5/061; C07F5/066; C07F5/068
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
75 words
A process for making aluminoxanes, said process comprising: (A) placing an inert hydrocarbon solution of a hydrocarbyl aluminum compound in a reaction vessel under an inert atmosphere, said inert hydrocarbon having a freezing point below the reaction temperature, (B) maintaining said solution at a reaction temperature in the range of about -80° up to -10° C. and (C) introducing liquid water into the free-space above the surface of said solution while intensively mixing said solution.
Claim 2
Dependent Claim
75 words
A process for making aluminoxanes, said process comprising: (A) placing an inert hydrocarbon solution of a hydrocarbyl aluminum compound in a reaction vessel under an inert atmosphere, said inert hydrocarbon having a freezing point below the reaction temperature, (B) maintaining said solution at a reaction temperature in the range of about -80° up to -10° C. and (C) introducing liquid water into the free-space above the surface of said solution while intensively mixing said solution.
Claim 3
Dependent Claim
14 words
A process of claim 1 wherein said hydrocarbyl aluminum compound is a trialkyl aluminum.
Claim 4
Dependent Claim
12 words
A process of claim 2 wherein said trialkyl aluminum is triisobutyl aluminum.
Claim 5
Dependent Claim
12 words
A process of claim 2 wherein said trialkyl aluminum is trimethyl aluminum.
Claim 6
Dependent Claim
14 words
A process of claim 1 wherein said inert hydrocarbon is an inert aromatic hydrocarbon.
Claim 7
Dependent Claim
12 words
A process of claim 5 conducted at a temperature below -20° C.
Claim 8
Dependent Claim
12 words
A process of claim 5 conducted at a temperature below -30° C.
Claim 9
Dependent Claim
12 words
A process of claim 5 conducted at a temperature below -40° C.
Claim 10
Dependent Claim
24 words
A process of claim 5 wherein said aromatic hydrocarbon is selected from toluene, ethylbenzene, isopropylbenzene, n-propylbenzene, n-butylbenzene, sec-butylbenzene, isobutylbenzene or tert-butylbenzene or mixtures thereof.
Claim 11
Dependent Claim
14 words
A process of claim 9 wherein said aluminum compound is a trialkyl aluminum compound.
Claim 12
Dependent Claim
12 words
A process of claim 10 wherein said trialkyl aluminum is triisobutyl aluminum.
Claim 13
Dependent Claim
12 words
A process of claim 11 conducted at a temperature below -20° C.
Claim 14
Dependent Claim
11 words
A process of claim 12 wherein said inert hydrocarbon is toluene.
Claim 15
Dependent Claim
12 words
A process of claim 10 wherein said trialkyl aluminum is trimethyl aluminum.
Claim 16
Dependent Claim
12 words
A process of claim 14 conducted at a temperature below -20° C.
Claim 17
Dependent Claim
11 words
A process of claim 15 wherein said inert hydrocarbon is isopropylbenzene.
Claim 18
Dependent Claim
11 words
A process of claim 15 wherein said inert hydrocarbon is toluene.
Claim 19
Dependent Claim
18 words
A process of claim 17 wherein the amount of water is about 0.5-1.0 moles per mole trimethyl aluminum.
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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) | 1993-11-05 | 1994-05-07 | 1994-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-05 | 1998-05-07 | 1998-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-05 | 2002-05-07 | 2002-11-06 | $7700.00 | Window Closed / Lapsed |