US3117162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogenation of nitriles
Assignee: Engelhard Industries Inc
•
Filing: 1960-03-30
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Granted: 1964-01-07
•
Expires: 1980-03-30
Abstract
No abstract record available.
Inventors
- 👤 Paul N Rylander
- 👤 Jay G Kaplan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 07:39
CPC Classifications
C; C07; C07C; C07C209/00; C07C209/44; C07C209/48
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
70 words
A PROCESS FOR THE PREPARATION OF DIPROPYLAMINE BY CATALYTIC HYDROGENATION OF PROPIONITRILE WHICH PROCESS COMPRISES CONTACTING A SOLUTION OF PROPIONITRILE IN AN INERT SOLVENT WITH HYDROGEN AT A TEMPERATURE BETWEEN 0* AND 80*C. AND A PRESSURE BETWEEN ATMOSPHERIC AND 1000 P.S.I.G. IN THE PRESENCE OF A SUPPORTED CATALYST CONSISTING ESSENTIALLY OF FROM 0.1% TO 10% BY WEIGHT RHODIUM ON A SUPPORT, AND SEPARATING DIPROPYLAMINE AS THE SOLE SUBSTANTIAL REACTION PRODUCT.
Claim 2
Dependent Claim
70 words
A PROCESS FOR THE PREPARATION OF DIPROPYLAMINE BY CATALYTIC HYDROGENATION OF PROPIONITRILE WHICH PROCESS COMPRISES CONTACTING A SOLUTION OF PROPIONITRILE IN AN INERT SOLVENT WITH HYDROGEN AT A TEMPERATURE BETWEEN 0* AND 80*C. AND A PRESSURE BETWEEN ATMOSPHERIC AND 1000 P.S.I.G. IN THE PRESENCE OF A SUPPORTED CATALYST CONSISTING ESSENTIALLY OF FROM 0.1% TO 10% BY WEIGHT RHODIUM ON A SUPPORT, AND SEPARATING DIPROPYLAMINE AS THE SOLE SUBSTANTIAL REACTION PRODUCT.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-01-06 | 1967-07-08 | 1968-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-01-06 | 1971-07-08 | 1972-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-01-06 | 1975-07-08 | 1976-01-07 | $7700.00 | Window Closed / Lapsed |