Patent US2902522A successfully refreshed from Google Patents.
US2902522A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dehydrogenation process and catalyst
Assignee: Phillips Petroleum Co
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Filing: 1957-03-29
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Granted: 1959-09-01
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Expires: 1977-03-29
Abstract
No abstract record available.
Inventors
- 👤 James R Owen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:14
CPC Classifications
C; C07; C07C; C07C5/00; C07C5/32; C07C5/327; C07C5/333; C07C5/3332; C07C5/321; C07C5/322
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
138 words
A PROCESS FOR CATALYTICALLY DEHYDROGENATING PARAFFIN HYDROCARBONS HAVING FROM 3 TO 8 CARBON ATOMS PER MOLECULE IN THE PRESENCE OF STEAM WITH SUBSTANTIALLY NO DECLINE IN CATALYST ACTIVITY WITH USE WHICH COMPRISES CONTACTING SAID HYDROCARBON WITH A CATALYST CONSISTING ESSENTIALLY OF VANADIA, CHROMIA, AND THORIA, SAID CATALYST BEING FROM 25 TO 50 WEIGHT PERCENT VANADIA, FROM 10 TO 65 WEIGHT PERCENT CHROMIA AND FROM 5 TO 65 WEIGHT PERCENT THORIA, UNDER DEHYDROGENATING CONDITIONS WHICH INCLUDE A TEMPERATURE IN THE RANGE OF ABOUT 1000 TO 1400* F., AN ABSOLUTE PRESSURE OF ABOUT 1 TO 3 ATMOSPHERES, A VOLUME RATIO OF STEAM TO HYDROCARBONS OF ABOUT 1 TO 20 VOLUMES OF STEAM PER VOLUME OF HYDROCARBON AND A HYDROCARBON SPACE VELOCITY OF ABOUT 200 TO 700 GASEOUS VOLUMES MEASURED AT STANDARD TEMPERATURE AND PRESSURE PER VOLUME OF CATALYST PER HOUR.
Claim 2
Dependent Claim
138 words
A PROCESS FOR CATALYTICALLY DEHYDROGENATING PARAFFIN HYDROCARBONS HAVING FROM 3 TO 8 CARBON ATOMS PER MOLECULE IN THE PRESENCE OF STEAM WITH SUBSTANTIALLY NO DECLINE IN CATALYST ACTIVITY WITH USE WHICH COMPRISES CONTACTING SAID HYDROCARBON WITH A CATALYST CONSISTING ESSENTIALLY OF VANADIA, CHROMIA, AND THORIA, SAID CATALYST BEING FROM 25 TO 50 WEIGHT PERCENT VANADIA, FROM 10 TO 65 WEIGHT PERCENT CHROMIA AND FROM 5 TO 65 WEIGHT PERCENT THORIA, UNDER DEHYDROGENATING CONDITIONS WHICH INCLUDE A TEMPERATURE IN THE RANGE OF ABOUT 1000 TO 1400* F., AN ABSOLUTE PRESSURE OF ABOUT 1 TO 3 ATMOSPHERES, A VOLUME RATIO OF STEAM TO HYDROCARBONS OF ABOUT 1 TO 20 VOLUMES OF STEAM PER VOLUME OF HYDROCARBON AND A HYDROCARBON SPACE VELOCITY OF ABOUT 200 TO 700 GASEOUS VOLUMES MEASURED AT STANDARD TEMPERATURE AND PRESSURE PER VOLUME OF CATALYST PER HOUR.
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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) | 1962-08-31 | 1963-03-02 | 1963-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-08-31 | 1967-03-02 | 1967-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-08-31 | 1971-03-02 | 1971-09-01 | $7700.00 | Window Closed / Lapsed |