US5403942A
Expired / Lapsed
US
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Process for the preparation of aluminoxanes
Assignee: Chemtura Organometallics GmbH
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Filing: 1994-03-16
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Granted: 1995-04-04
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Expires: 2014-03-16
Abstract
Abstract The invention relates to a process for the preparation of aluminoxanes by addition of water to a solution of trialkylaluminum in an inert solvent, characterized in that the water required for the reaction is metered via a mixing nozzle into a static mixer, in particular a jet loop reactor.
Inventors
- 👤 Ralf-Jurgen Becker
- 👤 Stefan Gurtzgen
- 👤 Rolf Schrader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:13
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/06; C07F5/061; C07F5/066; C07F5/068; B; B01; B01J; B01J19/00; B01J19/24; B01J19/2455; B01J19/246; B01J19/2465
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
107 words
A process for the preparation of aluminoxanes of the general formula R 2 AlO[RAlO] n AlR 2 or [--(R)AlO--] n+3 wherein: R is a branched or linear C 1 -C 10 -alkyl group, each of the radicals R is identical or different and each n is an integer from 0-20, by addition of water to a solution of trialkylaluminum of the formula Al(R) 3 in an aliphatic, cycloaliphatic or aromatic hydrocarbon solvent therefor whereby said water undergoes reaction with said trialkylaluminum to form said aluminoxane, characterized in that the water required for the reaction is metered via a mixing nozzle into said solution in a static mixer.
Claim 2
Dependent Claim
107 words
A process for the preparation of aluminoxanes of the general formula R 2 AlO[RAlO] n AlR 2 or [--(R)AlO--] n+3 wherein: R is a branched or linear C 1 -C 10 -alkyl group, each of the radicals R is identical or different and each n is an integer from 0-20, by addition of water to a solution of trialkylaluminum of the formula Al(R) 3 in an aliphatic, cycloaliphatic or aromatic hydrocarbon solvent therefor whereby said water undergoes reaction with said trialkylaluminum to form said aluminoxane, characterized in that the water required for the reaction is metered via a mixing nozzle into said solution in a static mixer.
Claim 3
Dependent Claim
18 words
A process according to claim 1, characterized in that the static mixer used is a jet loop reactor.
Claim 4
Dependent Claim
33 words
A process according to claim 1, characterized in that the water is metered into the reactor in a volume flow ratio of water to said solution of trialkylaluminum of from 1:500 to 1:40,000.
Claim 5
Dependent Claim
21 words
A process according to claim 1, characterized in that the reaction is carried out at from -20° C. to +100° C.
Claim 6
Dependent Claim
15 words
A process according to claim 1, characterized in that each R is a methyl group.
Claim 7
Dependent Claim
30 words
A process according to claim 1 characterized in that the water added to said solution conforms to a molar ratio of H 2 O:trialkylaluminum compound in the range of 0.6-1.2:1.
Claim 8
Dependent Claim
38 words
A process according to claim 1, characterized in that the water added to said solution conforms to a molar ratio of H 2 O:trialkylaluminum compound in the range from 0.65:1 to 0.75:1, and the trialkylaluminum compound is trimethylaluminum.
Claim 9
Dependent Claim
33 words
A process according to claim 7, characterized in that the water is metered into the reactor in a volume flow ratio of water to said solution of trialkylaluminum of from 1:2,000 to 1:20,000.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-04-03 | 1998-10-03 | 1999-04-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-04-03 | 2002-10-03 | 2003-04-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-04-03 | 2006-10-03 | 2007-04-04 | $7700.00 | Window Closed / Lapsed |