US2849478A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of nitriles
Assignee: Standard Oil Co
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Filing: 1956-12-18
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Granted: 1958-08-26
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Expires: 1976-12-18
Abstract
No abstract record available.
Inventors
- 👤 Zubay Geoffrey
- 👤 Carl E Johnson
- 👤 Thomas D Nevitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 11:17
CPC Classifications
C; C07; C07C; C07C255/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
90 words
A PROCESS FOR THE PREPARATION OF NITRILES WHICH COMPRISES CONTACTING AN AMINE HAVING THE GENERAL FORMULA RCH2NH2, IN WHICH R IS A HYDROCARBON RADICAL HAVING FROM 1 TO 15 CARBON ATOMS, WITH A CATALYST COMPRISED ESSENTIALLY OF ABOUT 1 TO 10 WEIGHT PERCENT OF ALKALI METAL OXIDE, ABOUT 10 TO 50 WEIGHT PERCENT OF CHROMIUM OXIDE AND THE REMAINDER ESSENTIALY ALUMINA AT A TEMPERATURE BETWEEN 425*C. AND 550*C. AT A SPACE VELOCITY OF AT LEAST 2 LIQUID VOLUMES OF AMINE/HOUR/ VOLUME OF CATALYST, AND RECOVERING NITRILES FROM THE REACTION PRODUCTS.
Claim 2
Dependent Claim
90 words
A PROCESS FOR THE PREPARATION OF NITRILES WHICH COMPRISES CONTACTING AN AMINE HAVING THE GENERAL FORMULA RCH2NH2, IN WHICH R IS A HYDROCARBON RADICAL HAVING FROM 1 TO 15 CARBON ATOMS, WITH A CATALYST COMPRISED ESSENTIALLY OF ABOUT 1 TO 10 WEIGHT PERCENT OF ALKALI METAL OXIDE, ABOUT 10 TO 50 WEIGHT PERCENT OF CHROMIUM OXIDE AND THE REMAINDER ESSENTIALY ALUMINA AT A TEMPERATURE BETWEEN 425*C. AND 550*C. AT A SPACE VELOCITY OF AT LEAST 2 LIQUID VOLUMES OF AMINE/HOUR/ VOLUME OF CATALYST, AND RECOVERING NITRILES FROM THE REACTION PRODUCTS.
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) | 1961-08-25 | 1962-02-24 | 1962-08-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-08-25 | 1966-02-24 | 1966-08-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-08-25 | 1970-02-24 | 1970-08-26 | $7700.00 | Window Closed / Lapsed |