Patent US3305586A successfully refreshed from Google Patents.
US3305586A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for preparing cyclohexanone
Assignee: Stamicarbon BV
•
Filing: 1963-08-12
•
Granted: 1967-02-21
•
Expires: 1983-08-12
Abstract
No abstract record available.
Inventors
- 👤 Phielix Bernard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 12:27
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
IN THE PROCESS FOR PREPARING CYCLOHEXANONE BY SELECTIVE CATALYTIC HYDROGENATION OF PHENOL, THE IMPROVEMENT WHICH CONSISTS ESSENTIALLY IN (1) FORMING A GASEOUS MIXTURE OF HYDROGEN AND PHENOL VAPORS HAVING A MOLECULAR RATIO OF HYDROGEN TO PHENOL IN THE RANGE OF FROM ABOUT 3:1 TO ABOUT 25:1; (2) PASSING THIS MIXTURE AT A TEMPERATURE FROM ABOUT 75*C. TO ABOUT 250*C. AND AT A PRESSURE FROM ABOUT 1 TO 5 ATMOSPHERES WHILE MAINTAINED IN THE VAPOR STATE THROUGH A REACTION ZONE AND OVER A FIXED BED CATALYST CONSISTING ESSENTIALLY OF A PALLADIUM METAL SUPPORTED ON A CARRIER, SAID METAL BEING PRESENT IN A REQUIRED AMOUNT OF FROM ABOUT 0.1 TO 0.8% OF SAID CARRIER, WHEREBY THE PHENOL IS HYDROGENATED IN THE VAPOR STATE TO CYCLOHEXANONE; (3) REMOVING THE VAPOR REACTION PRODUCT FROM SAID REACTION ZONE; AND (4) THEREAFTER CONDENSING THE VAPOR REACTION PRODUCT AND SEPARATING CYCLOHEXANONE THEREFROM IN HIGH YIELD.
Claim 2
Dependent Claim
148 words
IN THE PROCESS FOR PREPARING CYCLOHEXANONE BY SELECTIVE CATALYTIC HYDROGENATION OF PHENOL, THE IMPROVEMENT WHICH CONSISTS ESSENTIALLY IN (1) FORMING A GASEOUS MIXTURE OF HYDROGEN AND PHENOL VAPORS HAVING A MOLECULAR RATIO OF HYDROGEN TO PHENOL IN THE RANGE OF FROM ABOUT 3:1 TO ABOUT 25:1; (2) PASSING THIS MIXTURE AT A TEMPERATURE FROM ABOUT 75*C. TO ABOUT 250*C. AND AT A PRESSURE FROM ABOUT 1 TO 5 ATMOSPHERES WHILE MAINTAINED IN THE VAPOR STATE THROUGH A REACTION ZONE AND OVER A FIXED BED CATALYST CONSISTING ESSENTIALLY OF A PALLADIUM METAL SUPPORTED ON A CARRIER, SAID METAL BEING PRESENT IN A REQUIRED AMOUNT OF FROM ABOUT 0.1 TO 0.8% OF SAID CARRIER, WHEREBY THE PHENOL IS HYDROGENATED IN THE VAPOR STATE TO CYCLOHEXANONE; (3) REMOVING THE VAPOR REACTION PRODUCT FROM SAID REACTION ZONE; AND (4) THEREAFTER CONDENSING THE VAPOR REACTION PRODUCT AND SEPARATING CYCLOHEXANONE THEREFROM IN HIGH YIELD.
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) | 1970-02-20 | 1970-08-22 | 1971-02-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-20 | 1974-08-22 | 1975-02-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-20 | 1978-08-22 | 1979-02-21 | $7700.00 | Window Closed / Lapsed |