US4197259A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of haloaniline
Assignee: PPG Industries Inc
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Filing: 1979-02-22
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Granted: 1980-04-08
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Expires: 1999-02-22
Abstract
Abstract Haloaniline is produced in high yield by reacting halobenzene with a mixture containing a metal amide and a controlled molar excess of liquid ammonia based on the moles of halobenzene.
Inventors
- 👤 Frederick F. Guzik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:09
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/04; C07C209/06; C07C209/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
79 words
In a process for the preparation of haloaniline by the amination of halobenzene wherein alkali metal amide is reacted with halobenzene in liquid ammonia and wherein haloaniline is recovered from the reaction mixture the improvement comprising adding halobenzene to a mixture containing metal amide and liquid ammonia said mixture containing at least about 2 moles of metal amide per mole of halobenzene added and from about 50 to about 80 moles of liquid ammonia per mole of halobenzene added.
Claim 2
Dependent Claim
79 words
In a process for the preparation of haloaniline by the amination of halobenzene wherein alkali metal amide is reacted with halobenzene in liquid ammonia and wherein haloaniline is recovered from the reaction mixture the improvement comprising adding halobenzene to a mixture containing metal amide and liquid ammonia said mixture containing at least about 2 moles of metal amide per mole of halobenzene added and from about 50 to about 80 moles of liquid ammonia per mole of halobenzene added.
Claim 3
Dependent Claim
10 words
The process of claim 1 wherein the halobenzene is o-dichlorobenzene.
Claim 4
Dependent Claim
12 words
The process of claim 1 wherein the metal amide is sodium amide.
Claim 5
Dependent Claim
27 words
The process of claim 1 wherein the metal amide liquid ammonia mixture contains from about 65 to 75 moles of liquid ammonia per mole of halobenzene added.
References Cited (Backward Citations)
DE2734368A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-08 | 1983-10-08 | 1984-04-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-08 | 1987-10-08 | 1988-04-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-08 | 1991-10-08 | 1992-04-08 | $7700.00 | Window Closed / Lapsed |