US2739174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nitrating aromatic hydrocarbons with only nitric acid
Assignee: Eastman Kodak Co
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Filing: 1951-09-08
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Granted: 1956-03-20
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Expires: 1971-09-08
Abstract
No abstract record available.
Inventors
- 👤 Donald V Ross
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:50
CPC Classifications
C; C07; C07C; C07C201/00; C07C201/06; C07C201/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A PROCESS FOR THE MANUFACTURE OF NITRATED AROMATIC HYDROCARBONS SELECTED FROM THE GROUP CONSISTING OF NITROBENZENE, NITROTOLUENE AND NITROXYLENE, COMPRISING CONTACTING THE HYDROCARBON TO BE NITRATED AND A SUBSTANTIAL EXCESS OF NITRIC ACID IN A REACTION ZONE MAINTAINED AT ABOUT 100-120* C. AND BELOW THE BOILING POINT OF THE NITRATED HYDROCARBON, WITHDRAWING LIQUID MIXTURE FREE OF SAID HYDROCARBON AND CONSISTING OF WATER, NITRIC ACID AND NITRATED HYDROCARBONS FROM BELOW THE SURFACE OF THE LIQUID IN THE REACTION ZONE, AND DISTILLING THE LIQUID THUS WITHDRAWN IN A DISTILLATION ZONE DISTINCT FROM SAID REACTION ZONE AND FROM WHICH THERE IS REMOVED OVERHEAD A WATER-NITRATED HYDROCARBON AZEOTROPE WHICH PROVIDES NITRATED HYDROCARBON OF HIGH PURITY BY A SIMPLE CONDENSATION AND DECANTING STEP.
Claim 2
Dependent Claim
118 words
A PROCESS FOR THE MANUFACTURE OF NITRATED AROMATIC HYDROCARBONS SELECTED FROM THE GROUP CONSISTING OF NITROBENZENE, NITROTOLUENE AND NITROXYLENE, COMPRISING CONTACTING THE HYDROCARBON TO BE NITRATED AND A SUBSTANTIAL EXCESS OF NITRIC ACID IN A REACTION ZONE MAINTAINED AT ABOUT 100-120* C. AND BELOW THE BOILING POINT OF THE NITRATED HYDROCARBON, WITHDRAWING LIQUID MIXTURE FREE OF SAID HYDROCARBON AND CONSISTING OF WATER, NITRIC ACID AND NITRATED HYDROCARBONS FROM BELOW THE SURFACE OF THE LIQUID IN THE REACTION ZONE, AND DISTILLING THE LIQUID THUS WITHDRAWN IN A DISTILLATION ZONE DISTINCT FROM SAID REACTION ZONE AND FROM WHICH THERE IS REMOVED OVERHEAD A WATER-NITRATED HYDROCARBON AZEOTROPE WHICH PROVIDES NITRATED HYDROCARBON OF HIGH PURITY BY A SIMPLE CONDENSATION AND DECANTING STEP.
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) | 1959-03-20 | 1959-09-19 | 1960-03-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-03-20 | 1963-09-19 | 1964-03-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-03-20 | 1967-09-19 | 1968-03-20 | $7700.00 | Window Closed / Lapsed |