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Patent US3152184A successfully refreshed from Google Patents.
US3152184A
Expired / Lapsed
US
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Catalytic hydrogenation of nitriles
Assignee: Hercules Powder Co
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Filing: 1962-01-19
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Granted: 1964-10-06
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Expires: 1982-01-19
Abstract
No abstract record available.
Inventors
- 👤 Dewey R Levering
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:33
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/44; C07C209/48
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
112 words
A PROCESS FOR THE PREPARATION OF PRIMARY AND SECONDDARY AMINES WHICH COMPRISES SUBJECTING A MONOMERIC NITRILE OF THE FORMULA R(C$N)N TO HYDROGENATION WITH A GAS CONSISTING ESSENTIALLY OF HYDORGEN AT A TEMPERATURE BETWEEN ABOUT 100*C. AND ABOUT 300*C. AND A PRESSURE OF AT LEAST ABOUT 500 POUNDS PER SQUARE INCH IN THE PRESENCE OF FROM ABOUT 0.5% TO ABOUT 10%, BY WEIGHT OF SAID NITRILE, OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF IRON CARBNYL AND NICKEL CARBONYL, SAID N IN THE ABOVE FORMULA BEING ANY WHOLE NUMBER FROM 1 TO 4, INCLUSIVE, AND SAID R IN THE ABOVE FORMULA IS A HYDROCARGON RADICAL CONTAINING FROM 1 TO 18 CARBON ATOMS.
Claim 2
Dependent Claim
112 words
A PROCESS FOR THE PREPARATION OF PRIMARY AND SECONDDARY AMINES WHICH COMPRISES SUBJECTING A MONOMERIC NITRILE OF THE FORMULA R(C$N)N TO HYDROGENATION WITH A GAS CONSISTING ESSENTIALLY OF HYDORGEN AT A TEMPERATURE BETWEEN ABOUT 100*C. AND ABOUT 300*C. AND A PRESSURE OF AT LEAST ABOUT 500 POUNDS PER SQUARE INCH IN THE PRESENCE OF FROM ABOUT 0.5% TO ABOUT 10%, BY WEIGHT OF SAID NITRILE, OF A CATALYST SELECTED FROM THE GROUP CONSISTING OF IRON CARBNYL AND NICKEL CARBONYL, SAID N IN THE ABOVE FORMULA BEING ANY WHOLE NUMBER FROM 1 TO 4, INCLUSIVE, AND SAID R IN THE ABOVE FORMULA IS A HYDROCARGON RADICAL CONTAINING FROM 1 TO 18 CARBON ATOMS.
Claim 3
Dependent Claim
13 words
A PROCESS IN ACCORDANCE WITH CLAIM 1 IN WHICH THE NITRILE IS BENZONITRILE.
References Cited (Backward Citations)
US2644842A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-10-06 | 1968-04-06 | 1968-10-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-10-06 | 1972-04-06 | 1972-10-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-10-06 | 1976-04-06 | 1976-10-06 | $7700.00 | Window Closed / Lapsed |