US5427992A
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Process for preparing solutions of oligomeric methylaluminoxanes
Assignee: Chemtura Organometallics GmbH
•
Filing: 1992-09-08
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Granted: 1995-06-27
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Expires: 2012-09-08
Abstract
Abstract The invention relates to a process for preparing solutions of oligomeric methylaluminoxanes, which contain trimethylaluminum in the free and/or complexed form, in hydrocarbons by partial hydrolysis of trimethylaluminum with water and to carrying out this process in a rotor/stator reaction machine. The product obtained is suitable for preparing highly active polymerization catalysts.
Inventors
- 👤 Jurgen Graefe
- 👤 Stefan Gurtzgen
- 👤 Karl H. Muller
- 👤 Jurgen Schneider
- 👤 Rolf Schrader
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:12
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/18; B01J19/1868; B01J19/1881; B01J19/1887; B01J4/00; B01J4/02; C; C07; C07F; C07F5/00; C07F5/06; C07F5/061; C07F5/066; C07F5/068; B01J2219/00; B01J2219/00049; B01J2219/00051; B01J2219/00074; B01J2219/00087; B01J2219/00094
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
55 words
A process for preparing oligomeric methylaluminoxanes in solution which comprises adding water to trimethylaluminum in an aliphatic, cycloaliphatic or aromatic hydrocarbon solvent under an inert gas atmosphere, such that the molar ratio of water to trimethylaluminum ranges from about 0.65 to about 0.75, reacting the water with said trimethylaluminum and removing the insoluble by-products therefrom.
Claim 2
Dependent Claim
55 words
A process for preparing oligomeric methylaluminoxanes in solution which comprises adding water to trimethylaluminum in an aliphatic, cycloaliphatic or aromatic hydrocarbon solvent under an inert gas atmosphere, such that the molar ratio of water to trimethylaluminum ranges from about 0.65 to about 0.75, reacting the water with said trimethylaluminum and removing the insoluble by-products therefrom.
Claim 3
Dependent Claim
11 words
The process according to claim 1 wherein the solvent is alkylbenzenes.
Claim 4
Dependent Claim
23 words
The process according to claim 1 wherein the reaction is carried out at temperatures of from about -50° C. to about 100° C.
Claim 5
Dependent Claim
23 words
The process according to claim 3 wherein the reaction is carried out at a temperature of from about 0° to about 50° C.
Claim 6
Dependent Claim
18 words
The process according to claim 1 wherein the resulting solution of methylaluminoxanes is concentrated by removing the solvent.
Claim 7
Dependent Claim
23 words
The process according to claim 5 wherein the concentration of the solution is adjusted to about 10% to 50% by weight of alkylaluminoxane.
Claim 8
Dependent Claim
24 words
A process according to claim 1 wherein the methylaluminoxanes are isolated in the solid form by removal of the solvent from the solution obtained.
Claim 9
Dependent Claim
56 words
A process for preparing a solution of oligomeric methylaluminoxanes comprising adding sufficient water to react with trimethylaluminum under an inert gas atmosphere in an aliphatic, cycloaliphatic or aromatic hydrocarbon solvent in a rotor/stator reaction machine to form said oligomeric methylaluminoxanes, said addition taking place in the region of said reaction machine subjected to a turbulence field.
Claim 10
Dependent Claim
56 words
A process for preparing a solution of oligomeric methylaluminoxanes comprising adding sufficient water to react with trimethylaluminum under an inert gas atmosphere in an aliphatic, cycloaliphatic or aromatic hydrocarbon solvent in a rotor/stator reaction machine to form said oligomeric methylaluminoxanes, said addition taking place in the region of said reaction machine subjected to a turbulence field.
Claim 11
Dependent Claim
74 words
A process for preparing a solution of oligomeric methylaluminoxane which comprises adding trimethylaluminum in solution in an aliphatic, cycloaliphatic or aromatic hydrocarbon solvent into a stirrer vessel which feeds said solution at a continuous and uniform rate through connecting means into a rotor/stator reaction machine and adding sufficient water to react with said trimethylaluminum solution in the reaction area of said rotor/stator reaction machine subjected to a turbulence field to form said oligomeric methylaluminoxanes.
Claim 12
Dependent Claim
74 words
A process for preparing a solution of oligomeric methylaluminoxane which comprises adding trimethylaluminum in solution in an aliphatic, cycloaliphatic or aromatic hydrocarbon solvent into a stirrer vessel which feeds said solution at a continuous and uniform rate through connecting means into a rotor/stator reaction machine and adding sufficient water to react with said trimethylaluminum solution in the reaction area of said rotor/stator reaction machine subjected to a turbulence field to form said oligomeric methylaluminoxanes.
Claim 13
Dependent Claim
25 words
The process according to claim 9 wherein the trimethylaluminum is fed into the rotor/stator reaction machine by means of gravity flow or by a pump.
Claim 14
Dependent Claim
16 words
The process according to claim 9 wherein water is added by means of a metering pump.
Claim 15
Dependent Claim
16 words
The process according to claim 1 wherein the methyl aluminoxanes are present from 1-20% by weight.
Claim 16
Dependent Claim
15 words
The process according to claim 1 wherein the water is added dropwise to the trimethylaluminum.
Claim 17
Dependent Claim
71 words
A process for preparing a solution of oligomeric methylaluminoxanes comprising adding water to react with trimethylaluminum under an inert gas atmosphere in an aliphatic, cycloaliphatic or aromatic hydrocarbon solvent in a rotor/stator reaction machine to form said oligomeric methylaluminoxanes, such that the molar ratio of water to trimethylaluminum ranging from about 0.65 to about 0.75, said addition taking place in the region of said reaction machine subjected to a turbulence field.
Claim 18
Dependent Claim
71 words
A process for preparing a solution of oligomeric methylaluminoxanes comprising adding water to react with trimethylaluminum under an inert gas atmosphere in an aliphatic, cycloaliphatic or aromatic hydrocarbon solvent in a rotor/stator reaction machine to form said oligomeric methylaluminoxanes, such that the molar ratio of water to trimethylaluminum ranging from about 0.65 to about 0.75, said addition taking place in the region of said reaction machine subjected to a turbulence field.
Claim 19
Dependent Claim
90 words
A process for preparing a solution of oligomeric methylaluminoxane which comprises adding trimethylaluminum in solution in an aliphatic, cycloaliphatic or aromatic hydrocarbon solvent into a stirrer vessel which feeds said solution at a continuous and uniform rate through connecting means into a rotor/stator reaction machine and adding sufficient water to react with said trimethylaluminum solution in the reaction area of said rotor/stator reaction machine subjected to a turbulence field to form said oligomeric methylaluminoxanes such that the molar ratio of water to trimethylaluminum ranges from about 0.65 to about 0.75.
Claim 20
Dependent Claim
90 words
A process for preparing a solution of oligomeric methylaluminoxane which comprises adding trimethylaluminum in solution in an aliphatic, cycloaliphatic or aromatic hydrocarbon solvent into a stirrer vessel which feeds said solution at a continuous and uniform rate through connecting means into a rotor/stator reaction machine and adding sufficient water to react with said trimethylaluminum solution in the reaction area of said rotor/stator reaction machine subjected to a turbulence field to form said oligomeric methylaluminoxanes such that the molar ratio of water to trimethylaluminum ranges from about 0.65 to about 0.75.
Claim 21
Dependent Claim
25 words
The process according to claim 15 wherein the trimethylaluminum is fed into the rotor/stator reaction machine by means of gravity flow or by a pump.
Claim 22
Dependent Claim
16 words
The process according to claim 16 wherein water is added by means of a metering pump.
Claim 23
Dependent Claim
12 words
The process according to claim 15 wherein the solvent is alkyl benzene.
Claim 24
Dependent Claim
19 words
The process according to claim 15 wherein the reaction is carried out at 0° C. to about 50° C.
Claim 25
Dependent Claim
16 words
The process according to claim 15 wherein the reaction is carried out at about room temperature.
Claim 26
Dependent Claim
19 words
The process according to claim 15 wherein the resulting solution of oligomeric methylaluminoxanes is concentrated by removing the solvent.
Claim 27
Dependent Claim
24 words
The process according to claim 21 wherein the concentration of the solution is adjusted to about 10% to 50% by weight of the methylaluminoxanes.
Claim 28
Dependent Claim
12 words
The process according to claim 16 wherein the solvent is alkyl benzene.
Claim 29
Dependent Claim
19 words
The process according to claim 16 wherein the reaction is carried out at 0° C. to about 50° C.
Claim 30
Dependent Claim
16 words
The process according to claim 16 wherein the reaction is carried out at about room temperature.
Claim 31
Dependent Claim
18 words
The process according to claim 16 wherein the resulting solution of methylaluminoxanes are concentrated by removing the solvent.
Claim 32
Dependent Claim
24 words
The process according to claim 26 wherein the concentration of the solution is adjusted to about 10% to 50% by weight of the methylaluminoxanes.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1998-06-26 | 1998-12-26 | 1999-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-06-26 | 2002-12-26 | 2003-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-06-26 | 2006-12-26 | 2007-06-27 | $7700.00 | Window Closed / Lapsed |