US2999107A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Preparation of adiponitrile by hydrogenation of 1,4-dicyanobutenes
Assignee: EIDP Inc
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Filing: 1959-07-09
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Granted: 1961-09-05
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Expires: 1979-07-09
Abstract
No abstract record available.
Inventors
- 👤 Jr Richard Vernon Lindsey
- 👤 Stevenson Halsey Bidwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 22:21
CPC Classifications
C; C07; C07C; C07C255/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
A PROCESS FOR THE HYDROGENATION OF 1,4-DICYANOBUTENE ISOMERS IN THE LIQUID PHASE TO ADIPONITRILE WHICH COMPRISES REACTING THE SAID 1,4-DICYANOBUTENES WITH HYDROGEN UNDER PRESSURE IN THE RANGE OF 4 TO ABOUT 1000 ATMOSPHERES IN THE PRESENCE OF FROM ABOUT 0.0001% TO ABOUT 1% BY WEIGHT, BASED ON THE WEIGHT OF 1,4-DICYANOBUTENE, AND CALCULATED AS METALLIC RHODIUM, A RHODIUM CATALYST SELECTED FROM THE GROUP CONSISTING OF RHODIUM HALIDES, RHODIUM CHELATES, AND RHODIUM CARBONYL HALIDES AT A TEMPERATURE OF FROM 25*C. TO 150*C., AND RECOVERING ADIPONITRILE FROM THE REACTION MIXTURE.
Claim 2
Dependent Claim
88 words
A PROCESS FOR THE HYDROGENATION OF 1,4-DICYANOBUTENE ISOMERS IN THE LIQUID PHASE TO ADIPONITRILE WHICH COMPRISES REACTING THE SAID 1,4-DICYANOBUTENES WITH HYDROGEN UNDER PRESSURE IN THE RANGE OF 4 TO ABOUT 1000 ATMOSPHERES IN THE PRESENCE OF FROM ABOUT 0.0001% TO ABOUT 1% BY WEIGHT, BASED ON THE WEIGHT OF 1,4-DICYANOBUTENE, AND CALCULATED AS METALLIC RHODIUM, A RHODIUM CATALYST SELECTED FROM THE GROUP CONSISTING OF RHODIUM HALIDES, RHODIUM CHELATES, AND RHODIUM CARBONYL HALIDES AT A TEMPERATURE OF FROM 25*C. TO 150*C., AND RECOVERING ADIPONITRILE FROM THE REACTION MIXTURE.
References Cited (Backward Citations)
US2523312A
Cited
US2867628A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-09-04 | 1965-03-06 | 1965-09-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-09-04 | 1969-03-06 | 1969-09-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-09-04 | 1973-03-06 | 1973-09-05 | $7700.00 | Window Closed / Lapsed |