US3030415A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Separation of ortho-nitrotoluene from nitrotoluene mixtures
Assignee: Standard Oil Co
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Filing: 1958-05-14
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Granted: 1962-04-17
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Expires: 1978-05-14
Abstract
No abstract record available.
Inventors
- 👤 Ellis K Fields
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:42
CPC Classifications
C; C07; C07C; C07C201/00; C07C201/06; C07C201/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A PROCESS WHICH COMPRISES REACTING A MIXTURE CONSISTING ESSENTIALLY OF ORTHO-NITROTOLUENE AND PARA-NITROTOLUENE WITH MOLECULAR OXYGEN IN THE PRESENCE OF FROM 0.1 TO ABOUT 10 PARTS BY WEIGHT OF A LOWER SATURATED ALIPHATIC MONOCARBOXYLIC ACID PER PART OF NITROTOLUENE AND IN THE PRESENCE OF A CATALYST COMPRISING IN CONJOINT PRESENCE BROMINE AND A HEAVY METAL OXIDATION CATALYST, EFFECTING AND REACTION AT A TEMPERATURE OF FROM ABOUT 120*C. TO ABOUT 275*C. AND A PRESSURE OF 0 TO 1500 P.S.I.G. WHEREBY PARA-NITROTOLUENE IS SELECTIVELY OXIDIZED TO PARA-NITROBENZOIC ACID, RECOVERING SAID ACID AND RECOVERING UNCONVERTED NITROTOLUENES CONTAINING SUBSTANTIALLY ALL OF THE ORTHO-NITROTOLUENE CONTAINED IN SAID MIXTURE.
Claim 2
Dependent Claim
103 words
A PROCESS WHICH COMPRISES REACTING A MIXTURE CONSISTING ESSENTIALLY OF ORTHO-NITROTOLUENE AND PARA-NITROTOLUENE WITH MOLECULAR OXYGEN IN THE PRESENCE OF FROM 0.1 TO ABOUT 10 PARTS BY WEIGHT OF A LOWER SATURATED ALIPHATIC MONOCARBOXYLIC ACID PER PART OF NITROTOLUENE AND IN THE PRESENCE OF A CATALYST COMPRISING IN CONJOINT PRESENCE BROMINE AND A HEAVY METAL OXIDATION CATALYST, EFFECTING AND REACTION AT A TEMPERATURE OF FROM ABOUT 120*C. TO ABOUT 275*C. AND A PRESSURE OF 0 TO 1500 P.S.I.G. WHEREBY PARA-NITROTOLUENE IS SELECTIVELY OXIDIZED TO PARA-NITROBENZOIC ACID, RECOVERING SAID ACID AND RECOVERING UNCONVERTED NITROTOLUENES CONTAINING SUBSTANTIALLY ALL OF THE ORTHO-NITROTOLUENE CONTAINED IN SAID MIXTURE.
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) | 1965-04-16 | 1965-10-16 | 1966-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-04-16 | 1969-10-16 | 1970-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-04-16 | 1973-10-16 | 1974-04-17 | $7700.00 | Window Closed / Lapsed |