US3305587A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydrogenation of cycloalkanols
Assignee: —
•
Filing: —
•
Granted: 1967-02-21
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Expires: 1984-02-21
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 04:19
CPC Classifications
C; C07; C07C; C07C45/00; C07C45/41; C07C35/00; C07C35/02; C07C35/08; B; B01; B01J; B01J23/00; B01J23/06; C07C45/27; C07C45/29; C07C49/00; C07C49/385; C07C49/403; C07C2601/00; C07C2601/12; C07C2601/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
A PROCESS FOR THE CATALYTIC DEHYDROGENATION OF A CYCLOALKANOL OF SIX TO TWELVE CARBON ATOMS AT A TEMPERATURE OF 250* TO 450*C. IN THE GAS PHASE WHICH COMPRISES CONTACTING SAID CYCLOALKANOL WITH A CATALYST COMPRISING ZINC OXIDE WHICH HAS BEEN OBTAINED BY PRECIPITATION OF AN AQUEOUS ZINC SALT SOLUTION WITH A BASIC PRECIPITANT, SEPARATION OF THE PRECIPITATE FROM THE AQUEOUS PHASE, HEATING IT WITHIN AT LEAST TWO HOURS TO ABOUT 400*C. AND ANNEALING AT A TEMPERATURE BETWEEN 400* AND 600*C. FOR TWO TO TEN HOURS, THE PERIOD OF HEATING AND TEMPERATURE BEING CORRELATED SO THAT A ZINC OXIDE HAVING A SURFACE AREA OF 5 TO 20 M.2/G. IS FORMED.
Claim 2
Dependent Claim
109 words
A PROCESS FOR THE CATALYTIC DEHYDROGENATION OF A CYCLOALKANOL OF SIX TO TWELVE CARBON ATOMS AT A TEMPERATURE OF 250* TO 450*C. IN THE GAS PHASE WHICH COMPRISES CONTACTING SAID CYCLOALKANOL WITH A CATALYST COMPRISING ZINC OXIDE WHICH HAS BEEN OBTAINED BY PRECIPITATION OF AN AQUEOUS ZINC SALT SOLUTION WITH A BASIC PRECIPITANT, SEPARATION OF THE PRECIPITATE FROM THE AQUEOUS PHASE, HEATING IT WITHIN AT LEAST TWO HOURS TO ABOUT 400*C. AND ANNEALING AT A TEMPERATURE BETWEEN 400* AND 600*C. FOR TWO TO TEN HOURS, THE PERIOD OF HEATING AND TEMPERATURE BEING CORRELATED SO THAT A ZINC OXIDE HAVING A SURFACE AREA OF 5 TO 20 M.2/G. IS FORMED.
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 |