US5093295A
Expired / Lapsed
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Process for producing homogeneous aluminoxane solution
Assignee: Dow Chemical Co
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Filing: 1990-03-08
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Granted: 1992-03-03
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Expires: 2010-03-08
Abstract
Abstract The present invention provides a process for producing a homogeneous aluminoxane solution wherein an alkylaminoxane (A) obtained by reacting an organoaluminum compound with water and removing a solid residue by filtration is reacted with an organoaluminum compound (C) in the presence of an aromatic hydrocarbon solvent (B). According to the present invention, the gel-free homogeneous aluminoxane solution can be obtained and the catalytic activity thereof is not deteriorated during the storage.
Inventors
- 👤 Norio Tomotsu
- 👤 Masahiko Kuramoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:05
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/06; C07F5/061; C07F5/066; C07F5/068; C08; C08F; C08F10/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
64 words
A process for producing an homogeneous aluminoxane solution free of gel components comprising reacting an organoaluminum compound with water to form an alkylaluminoxane (A); filtering the alkylaluminoxane (A) to remove any solid residue; and thereafter mixing the alkylaluminoxane (A) with an aromatic hydrocarbon solvent (B) and an organoaluminum compound (C) to react the alkylaluminoxane (A) with the organoaluminum compound (C) to form the aluminoxane.
Claim 2
Dependent Claim
64 words
A process for producing an homogeneous aluminoxane solution free of gel components comprising reacting an organoaluminum compound with water to form an alkylaluminoxane (A); filtering the alkylaluminoxane (A) to remove any solid residue; and thereafter mixing the alkylaluminoxane (A) with an aromatic hydrocarbon solvent (B) and an organoaluminum compound (C) to react the alkylaluminoxane (A) with the organoaluminum compound (C) to form the aluminoxane.
Claim 3
Dependent Claim
26 words
The process according to claim 1 wherein the alkylaluminoxane (A) is methylaluminoxane having a molecular weight determined by cryoscopic method with benzene of 500 to 4,000.
Claim 4
Dependent Claim
20 words
The process according to claim 1 wherein the organoaluminum compound used in the preparation of the alkylaluminoxane (A) is trialkylaluminum.
Claim 5
Dependent Claim
18 words
The process according to claim 1 wherein the aromatic hydrocarbon solvent is benzene, toluene, ethylbenzene, xylene or cumene.
Claim 6
Dependent Claim
20 words
The process according to claim 1 wherein the organoaluminum compound (C) is an organoaluminum compound having a branched alkyl group.
Claim 7
Dependent Claim
30 words
The process according to claim 1 wherein the molar ratio of the organoaluminum compound (C) to the alkylaluminoxane (A) to be reacted is 0.01/1 to 1/1 (in terms of aluminum).
Claim 8
Dependent Claim
30 words
The process according to claim 1 wherein the molar ratio of the organoaluminum compound (C) to the alkylaluminoxane (A) to be reacted is 0.01/1 to 0.4/1 (in terms of aluminum).
Claim 9
Dependent Claim
30 words
The process according to claim 1 wherein the molar ratio of the organoaluminum compound (C) to the alkylaluminoxane (A) to be reacted is 0.01/1 to 0.09/1 (in terms of aluminum).
Claim 10
Dependent Claim
32 words
The process according to claim 1 wherein the concentration of the organoaluminum compound (C) and the alkylaluminoxane (A) in the aromatic hydrocarbon solvent is 0.01 to 5 mol/( (in terms of aluminum).
Claim 11
Dependent Claim
97 words
The process according to claim 1 wherein the organoaluminum compound (C) is represented by the formula R.sup.1.sub.k Al(OR.sup.2)mHpX.sup.1 q (I) wherein R 1 and R 2 each represent an alkyl group having 1 to 8 carbon atoms, X 1 represents a halogen atom, k represents a number of 0<k≦3, m represents a number of 0<m≦3, p represents a number of 0<p≦3 and q represents a number of 0<q≦3, with the proviso that k+m+p+q is 3; the aromatic hydrocarbon solvent (B) is benzene, toluene, ethylbenzene, xylene or cumene; and the reaction temperature is -40° C. to 150° C.
Claim 12
Dependent Claim
22 words
The process according to claim 10 wherein the organoaluminum compound (C) has a branched alkyl group having 3 to 9 carbon atoms.
Claim 13
Dependent Claim
13 words
The process according to claim 11 wherein the branched alkyl group is isobutyl.
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) | 1995-03-03 | 1995-09-02 | 1996-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-03 | 1999-09-02 | 2000-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-03 | 2003-09-02 | 2004-03-03 | $7700.00 | Window Closed / Lapsed |