US3021342A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrogenation of pyrans and furans
Assignee: Quaker Oats Co
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Filing: 1958-07-07
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Granted: 1962-02-13
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Expires: 1978-07-07
Abstract
No abstract record available.
Inventors
- 👤 Donald G Manly
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 11:31
CPC Classifications
C; C07; C07D; C07D309/00; C07D309/02; C07D309/04; C07D307/00; C07D307/02; C07D307/04; C07D307/06; C07D307/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
IN A PROCESS OF HYDROGENATING A COMPOUND OF THE GROUP CONSISTING OF FURAN, METHYLFURAN AND DIHYDROPYRAN WHICH COMPRISES CONTACTING SAID COMPOUND IN THE VAPOR PHASE IN THE PRESENCE OF A NICKEL CATALYST WITH HYDROGEN AT A HYDROGENATING TEMPERATURE OF BELOW ABOUT 120* C.; THE IMPROVEMENT WHEREIN SAID CATALYST IS A NICKEL CATALYST WHICH HAS BEEN REDUCED AT A TEMPERATURE BELOW ABOUT 450* C., REOXIDIZED BY PASSING A GAS CONTAINING FREE OXYGEN OVER THE REDUCED CATALYST, AND AGAIN REDUCED BY PASSING A GAS THEREOVER CONTAINING FREE HYDROGEN AT A TEMPERATURE BELOW ABOUT 250* C., AND WHEREIN SAID CONTACTING IS IN THE PRESENCE OF AN AMINE SELECTED FROM A GROUP CONSISTING OF STRONGLY BASIC HYDROCARBON MONOAMINES FREE OF ALIPHATIC UNSATURATION AND HETEROCYCLIC AMINES CONTAINING NO SUBSTITUENTS OTHER THAN CARBON, NITROGEN, HYDROGEN AND OXYGEN, SAID AMINE BEING EMPLOYED IN AN AMOUNT CORRESPONDING TO AT LEAST 0.01% BY WEIGHT OF THE COMPOUND BEING HYDROGENATED.
Claim 2
Dependent Claim
150 words
IN A PROCESS OF HYDROGENATING A COMPOUND OF THE GROUP CONSISTING OF FURAN, METHYLFURAN AND DIHYDROPYRAN WHICH COMPRISES CONTACTING SAID COMPOUND IN THE VAPOR PHASE IN THE PRESENCE OF A NICKEL CATALYST WITH HYDROGEN AT A HYDROGENATING TEMPERATURE OF BELOW ABOUT 120* C.; THE IMPROVEMENT WHEREIN SAID CATALYST IS A NICKEL CATALYST WHICH HAS BEEN REDUCED AT A TEMPERATURE BELOW ABOUT 450* C., REOXIDIZED BY PASSING A GAS CONTAINING FREE OXYGEN OVER THE REDUCED CATALYST, AND AGAIN REDUCED BY PASSING A GAS THEREOVER CONTAINING FREE HYDROGEN AT A TEMPERATURE BELOW ABOUT 250* C., AND WHEREIN SAID CONTACTING IS IN THE PRESENCE OF AN AMINE SELECTED FROM A GROUP CONSISTING OF STRONGLY BASIC HYDROCARBON MONOAMINES FREE OF ALIPHATIC UNSATURATION AND HETEROCYCLIC AMINES CONTAINING NO SUBSTITUENTS OTHER THAN CARBON, NITROGEN, HYDROGEN AND OXYGEN, SAID AMINE BEING EMPLOYED IN AN AMOUNT CORRESPONDING TO AT LEAST 0.01% BY WEIGHT OF THE COMPOUND BEING HYDROGENATED.
References Cited (Backward Citations)
GB565175A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-02-12 | 1965-08-14 | 1966-02-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-12 | 1969-08-14 | 1970-02-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-12 | 1973-08-14 | 1974-02-13 | $7700.00 | Window Closed / Lapsed |