US2824880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the manufacture of anthraquinone from anthracene by catalytic oxidation
Assignee: BASF Schweiz AG
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Filing: 1955-06-07
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Granted: 1958-02-25
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Expires: 1975-06-07
Abstract
No abstract record available.
Inventors
- 👤 Wettstein Walter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 23:15
CPC Classifications
C; C07; C07D; C07D307/00; C07D307/77; C07D307/87; C07D307/89; B; B01; B01J; B01J23/00; B01J23/16; B01J23/20; B01J23/22; C07B; C07B35/00; C07B35/04; C07C; C07C50/00; C07C50/16; C07C50/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A PROCESS FOR THE MANUFACTURE OF ANTHRAQUINONE FROMANTHRACENE BY CATALYTIC OXIDATION, WHICH COMPRISES CATALYTICALLY OXIDIZING ANTHRACENE IN THE PRESENCE OF AN OXIDATION CATALYST CONTAINING A VANADIUM COMPOUND SELECTED FROM THE GROUP CONSISTS OF VANADIC ACID AND VANADIUM OXIDE, SAID VANADIUM COMPOUND BEING INCORPORATED WITH A METAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL OXIDES, ALKALI METAL HYDROXIDES, ALKALI METAL VANADATES, SALTS OF AN ALKALI METAL WITH A VOLATILE ACID, ALKALINE EARTH METAL OXIDES, ALKALINE EARTH METAL HYDROXIDES, ALKALINE EARTH METAL VANADATES AND SALTS OF AN ALKALINE EARTH METAL WITH A VOLATILE ACID IN A PROPORTION OF 0.4 TO 0.7 EQUIVALENT OF SAID METAL COMPOUND PER ATOMIC PROPORTION OF VANADIUM PRESENT.
Claim 2
Dependent Claim
112 words
A PROCESS FOR THE MANUFACTURE OF ANTHRAQUINONE FROMANTHRACENE BY CATALYTIC OXIDATION, WHICH COMPRISES CATALYTICALLY OXIDIZING ANTHRACENE IN THE PRESENCE OF AN OXIDATION CATALYST CONTAINING A VANADIUM COMPOUND SELECTED FROM THE GROUP CONSISTS OF VANADIC ACID AND VANADIUM OXIDE, SAID VANADIUM COMPOUND BEING INCORPORATED WITH A METAL COMPOUND SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL OXIDES, ALKALI METAL HYDROXIDES, ALKALI METAL VANADATES, SALTS OF AN ALKALI METAL WITH A VOLATILE ACID, ALKALINE EARTH METAL OXIDES, ALKALINE EARTH METAL HYDROXIDES, ALKALINE EARTH METAL VANADATES AND SALTS OF AN ALKALINE EARTH METAL WITH A VOLATILE ACID IN A PROPORTION OF 0.4 TO 0.7 EQUIVALENT OF SAID METAL COMPOUND PER ATOMIC PROPORTION OF VANADIUM PRESENT.
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) | 1961-02-24 | 1961-08-26 | 1962-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-02-24 | 1965-08-26 | 1966-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-02-24 | 1969-08-26 | 1970-02-25 | $7700.00 | Window Closed / Lapsed |