US4122288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrolysis of alkyl substituted dihalobenzene compounds
Assignee: Honeywell UOP LLC
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Filing: 1977-11-16
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Granted: 1978-10-24
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Expires: 1997-11-16
Abstract
Abstract Alkyl substituted 1,2-halofluorinated aromatic compounds may be subjected to hydrolysis to form an alkyl substituted o-fluorophenol by treating said compound with water in the presence of a relatively mildly basic compound such as the salt of a strong base and a weak acid at hydrolysis conditions to form the desired compound.
Inventors
- 👤 Nils J. Christensen
- 👤 Joseph Levy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:11
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/01; C07C37/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
61 words
A process for the preparation of 5-t-butyl-2-fluorophenol which comprises treating 4-t-butyl-2-bromofluorobenzene with water and a salt of a strong base and a weak acid at a temperature of from about 100° C. to about 300° C., a pressure of from about atmospheric to about 2000 pounds per square inch and a time period of from about 0.5 to about 10 hours.
Claim 2
Dependent Claim
61 words
A process for the preparation of 5-t-butyl-2-fluorophenol which comprises treating 4-t-butyl-2-bromofluorobenzene with water and a salt of a strong base and a weak acid at a temperature of from about 100° C. to about 300° C., a pressure of from about atmospheric to about 2000 pounds per square inch and a time period of from about 0.5 to about 10 hours.
Claim 3
Dependent Claim
26 words
The process as set forth in claim 1 further characterized in that said process is effected in the presence of a catalyst comprising a copper compound.
Claim 4
Dependent Claim
15 words
The process as set forth in claim 1 in which said salt is sodium acetate.
Claim 5
Dependent Claim
15 words
The process as set forth in claim 1 in which said salt is sodium bisulfite.
Claim 6
Dependent Claim
15 words
The process as set forth in claim 1 in which said salt is sodium sulfide.
Claim 7
Dependent Claim
15 words
The process as set forth in claim 2 in which said catalyst comprises cuprous oxide.
References Cited (Backward Citations)
US2934569A
Cited
US2950325A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-10-23 | 1982-04-24 | 1982-10-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-10-23 | 1986-04-24 | 1986-10-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-10-23 | 1990-04-24 | 1990-10-24 | $7700.00 | Window Closed / Lapsed |