US3899540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydroxylation process
Assignee: Mitsubishi Gas Chemical Co Inc
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Filing: 1974-01-28
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Granted: 1975-08-12
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Expires: 1994-01-28
Abstract
Abstract Hydroxylated aromatic compounds such as phenols are prepared by reacting one or more aromatic compounds with hydrogen peroxide in the presence of trifluoroacetic acid and hydrogen fluoride at a temperature of from -70*C to +50*C.
Inventors
- 👤 Takashi Suzuki
- 👤 Susumu Naito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:12
CPC Classifications
C; C07; C07C; C07C37/00; C07C37/60; C07C41/00; C07C41/01; C07C41/18; C07C41/26
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
79 words
A PROCESS FOR PREPARING A HYDROXYLATED AROMATIC COMPOUND WHICH COMPRISES REACTING AT LEAST ONE AROMATIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF UNSUBSTITUTED AROMATIC HYDROCARBONS AND AROMATIC HYDROCARBONS SUBSTITUTED WITH LOWER ALKYL, LOWER ALKOXY, HALOGEN AND HYDROXY WITH HYDROGEN PEROXIDE IN THE PRESENCE OF TRIFLUOROACETIC ACID AND HYDROGEN FLUORIDE AT A TEMPERATURE OF FROM -70*C. TO +50*C., AT LEAST ONE MOLE OF TRIFLUOROACETIC ACID AND 5 TO 50 MOLES OF HYDROGEN FLUORIDE BEING EMPLOYED PER MOLE OF HYDROGEN PEROXIDE.
Claim 2
Dependent Claim
79 words
A PROCESS FOR PREPARING A HYDROXYLATED AROMATIC COMPOUND WHICH COMPRISES REACTING AT LEAST ONE AROMATIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF UNSUBSTITUTED AROMATIC HYDROCARBONS AND AROMATIC HYDROCARBONS SUBSTITUTED WITH LOWER ALKYL, LOWER ALKOXY, HALOGEN AND HYDROXY WITH HYDROGEN PEROXIDE IN THE PRESENCE OF TRIFLUOROACETIC ACID AND HYDROGEN FLUORIDE AT A TEMPERATURE OF FROM -70*C. TO +50*C., AT LEAST ONE MOLE OF TRIFLUOROACETIC ACID AND 5 TO 50 MOLES OF HYDROGEN FLUORIDE BEING EMPLOYED PER MOLE OF HYDROGEN PEROXIDE.
Claim 3
Dependent Claim
27 words
A process according to claim 1, wherein 1 mole or less of hydrogen peroxide is used per mole of the aromatic compound in the case of monohydroxylation.
Claim 4
Dependent Claim
27 words
A process according to claim 1, wherein 1 mole or more of hydrogen peroxide is used per mole of the aromatic compound in the case of polyhydroxylation.
Claim 5
Dependent Claim
13 words
A process according to claim 1, wherein the aromatic compound is an alkylbenzene.
Claim 6
Dependent Claim
15 words
A process according to claim 1, wherein the aromatic compound is o-, p- or m-xylene.
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) | 1978-08-11 | 1979-02-10 | 1979-08-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-11 | 1983-02-10 | 1983-08-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-11 | 1987-02-10 | 1987-08-12 | $7700.00 | Window Closed / Lapsed |