Patent US3965182A successfully refreshed from Google Patents.
US3965182A
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Preparation of aniline from phenol and ammonia
Assignee: Ethyl Corp
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Filing: 1969-10-02
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Granted: 1976-06-22
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Expires: 1989-10-02
Abstract
Abstract Aromatic amines are made by reacting a phenol with aluminum nitride and either ammonia or a primary or secondary amine at temperatures from 200°-600°C. For example, 2,6-dimethyl-phenol reacts with aluminum nitride and ammonia to yield 2,6-dimethylaniline.
Inventors
- 👤 Calvin J. Worrel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:08
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/04; C07C209/14; C07C209/18
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
25 words
A process for making aromatic amines, said process comprising reacting a phenol with aluminum nitride and ammonia in a temperature range of from about 200°-600°C.
Claim 2
Dependent Claim
25 words
A process for making aromatic amines, said process comprising reacting a phenol with aluminum nitride and ammonia in a temperature range of from about 200°-600°C.
Claim 3
Dependent Claim
12 words
A process of claim 1 wherein said phenol is a mononuclear phenol.
Claim 4
Dependent Claim
13 words
A process of claim 2 wherein said temperature range is from about 300°-550°C.
Claim 5
Dependent Claim
53 words
A process of claim 3 wherein said mononuclear phenol is substituted in at least one nuclear position ortho to the phenolic hydroxyl radical with a group selected from alkyl radicals containing 1-20 carbon atoms, cycloalkyl radicals containing 6-20 carbon atoms, aryl radicals containing 6-20 carbon atoms or aralkyl radicals containing 7-20 carbon atoms.
Claim 6
Dependent Claim
24 words
A process of claim 4 wherein said mononuclear phenol is a 2,6-dialkylphenol in which the alkyl groups contain 1 to about 20 carbon atoms.
Claim 7
Dependent Claim
10 words
A process of claim 5 wherein said 2,6-dialkylphenol is 2,6-dimethylphenol.
Claim 8
Dependent Claim
13 words
A process of claim 6 wherein said temperature range is from about 300°-550°C.
References Cited (Backward Citations)
US2000410A
Cited
US3565940A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-06-22 | 1979-12-22 | 1980-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-06-22 | 1983-12-22 | 1984-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-06-22 | 1987-12-22 | 1988-06-22 | $7700.00 | Window Closed / Lapsed |