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US4924018A
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Alkylaluminoxane process
Assignee: Albemarle Corp
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Filing: 1989-06-26
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Granted: 1990-05-08
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Expires: 2009-06-26
Abstract
Abstract Alkylaluminoxanes are made in a continuous process by feeding an inert solvent solution of an alkyl aluminum compound and a water/inert solvent emulsion to a first reaction vessel maintained at about -20° to 30° C. and transferring reaction mixture to a second reaction zone at a rate which maintains a constant liquid level in the first reaction vessel and results in an average residence time of about 1-60 minutes.
Inventors
- 👤 Scott A. Bottelberghe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:25
CPC Classifications
C; C07; C07F; C07F5/00; C07F5/06; C07F5/061; C07F5/066; C07F5/068
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
122 words
A continuous process for making an alkylaluminoxane, said process comprising: (A) feeding a solution of an alkyl aluminum compound in an inert hydrocarbon solvent to a first reaction zone, (B) forming an emulsion of 0.5-10 weight percent water in an inert solvent and feeding said emulsion to said first reaction zone, the ratio of moles of water to aluminum atoms being about 0.4-1:1, (C) removing reaction mixture from said first reaction zone at a rate that maintains a constant liquid volume in said first reaction zone, further characterized in that the combined feed rate of said solution of an alkyl aluminum compound and said emulsion results in an average residence time in said first reaction zone of about 1 to 60 minutes.
Claim 2
Dependent Claim
122 words
A continuous process for making an alkylaluminoxane, said process comprising: (A) feeding a solution of an alkyl aluminum compound in an inert hydrocarbon solvent to a first reaction zone, (B) forming an emulsion of 0.5-10 weight percent water in an inert solvent and feeding said emulsion to said first reaction zone, the ratio of moles of water to aluminum atoms being about 0.4-1:1, (C) removing reaction mixture from said first reaction zone at a rate that maintains a constant liquid volume in said first reaction zone, further characterized in that the combined feed rate of said solution of an alkyl aluminum compound and said emulsion results in an average residence time in said first reaction zone of about 1 to 60 minutes.
Claim 3
Dependent Claim
22 words
A process of claim 1 wherein said first stirred reaction zone is maintained at a temperature of -20° C. to 30° C.
Claim 4
Dependent Claim
14 words
A process of claim 2 wherein said average residence time is about 1-10 minutes.
Claim 5
Dependent Claim
15 words
A process of claim 3 wherein said aluminum alkyl is a tri-C 1-4 alkyl aluminum.
Claim 6
Dependent Claim
15 words
A process of claim 4 wherein said inert solvent is an aliphatic or aromatic hydrocarbon.
Claim 7
Dependent Claim
14 words
A process of claim 5 wherein said tri-C 1-4 alkyl aluminum is trimethyl aluminum.
Claim 8
Dependent Claim
11 words
A process of claim 6 wherein said inert solvent is toluene.
Claim 9
Dependent Claim
24 words
A process of claim 5 wherein said solution of an alkyl aluminum compound contains about 1-30 weight percent of said tri-C 1-4 alkyl aluminum.
Claim 10
Dependent Claim
14 words
A process of claim 8 wherein said tri-C 1-4 alkyl aluminum is trimethyl aluminum.
Claim 11
Dependent Claim
11 words
A process of claim 9 wherein said inert solvent is toluene.
Claim 12
Dependent Claim
65 words
A process of claim 1 further characterized by including: (D) transferring said reaction mixture to a second reaction zone at 10°-50° C., (E) removing said reaction mixture from said second reaction zone at a rate that maintains a constant liquid volume in said second reaction zone, the volume of said second reaction zone being sufficient to provide an average residence time of about 1-60 minutes.
Claim 13
Dependent Claim
15 words
A process of claim 11 wherein said aluminum alkyl is a tri-C 1-4 alkyl aluminum.
Claim 14
Dependent Claim
15 words
A process of claim 12 wherein said inert solvent is an aliphatic or aromatic hydrocarbon.
Claim 15
Dependent Claim
14 words
A process of claim 13 wherein said tri-C 1-4 alkyl aluminum is trimethyl aluminum.
Claim 16
Dependent Claim
11 words
A process of claim 14 wherein said inert solvent is toluene.
Claim 17
Dependent Claim
24 words
A process of claim 12 wherein said solution of a alkyl aluminum compound contains about 1-30 weight percent of said tri-C 1-4 alkyl aluminum.
Claim 18
Dependent Claim
14 words
A process of claim 16 wherein said tri-C 1-4 alkyl aluminum is trimethyl aluminum.
Claim 19
Dependent Claim
11 words
A process of claim 17 wherein said inert solvent is toluene.
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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) | 1993-05-07 | 1993-11-06 | 1994-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-05-07 | 1997-11-06 | 1998-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-05-07 | 2001-11-06 | 2002-05-08 | $7700.00 | Window Closed / Lapsed |