Patent US2688518A successfully refreshed from Google Patents.
US2666086A
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Preparation of iron dehydrogenation catalysts
Assignee: Phillips Petroleum Co
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Filing: 1949-11-14
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Granted: 1954-01-12
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Expires: 1969-11-14
Abstract
No abstract record available.
Inventors
- 👤 Emory W Pitzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:57
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/78; Y; Y10; Y10S; Y10S585/00; Y10S585/8995; Y10S585/906
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
152 words
A PROCESS FOR PREPARING CATALYTIC MATERIAL FOR DEHYDROGENATION OF DEHYDROGENATIONABLE HYDROCARBONS WHICH COMPRISES FORMING AN INTIMATE FINELY DIVIDED MIXTURE OF A COMPOUND OF IRON, A COMPOUND OF AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF CHROMIUM, MOLYBDENUM, TUNGSTEN, URANIUM, AND VANADIUM, AND A COMPOUND OF POTASSIUM, EACH OF SAID COMPOUNDS BEING SELECTED FROM THE GROUP CONSISTING OF THE OXIDES AND COMPOUNDS CONVERTED TO THE OXIDES BY THE HEREINAFTER RECITED DIGESTING AND CALCINING STEPS; DIGESTING SAID MIXTURE WITH AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF NITRIC ACID AND AMMONIUM NITRATE IN A MINIMUM AMOUNT EQUAL TO ONE-HALF THE WEIGHT OF SAID MIXTURE FOR A MINIMUM PERIOD OF ONE HOUR IN THE PRESENCE OF EXCESS FLUID; EVAPORATING THE DIGESTED MIXTURE TO DRYNESS; CALCINING THE RESIDUE AT A TEMPERATURE IN THE RANGE OF 500 TO 1100* F. SO AS TO DRIVE OFF ANY REMAINING VOLATILE MATERIALS; AND COMMINUTING THE CALCINED RESIDUE.
Claim 2
Dependent Claim
152 words
A PROCESS FOR PREPARING CATALYTIC MATERIAL FOR DEHYDROGENATION OF DEHYDROGENATIONABLE HYDROCARBONS WHICH COMPRISES FORMING AN INTIMATE FINELY DIVIDED MIXTURE OF A COMPOUND OF IRON, A COMPOUND OF AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF CHROMIUM, MOLYBDENUM, TUNGSTEN, URANIUM, AND VANADIUM, AND A COMPOUND OF POTASSIUM, EACH OF SAID COMPOUNDS BEING SELECTED FROM THE GROUP CONSISTING OF THE OXIDES AND COMPOUNDS CONVERTED TO THE OXIDES BY THE HEREINAFTER RECITED DIGESTING AND CALCINING STEPS; DIGESTING SAID MIXTURE WITH AT LEAST ONE MEMBER OF THE GROUP CONSISTING OF NITRIC ACID AND AMMONIUM NITRATE IN A MINIMUM AMOUNT EQUAL TO ONE-HALF THE WEIGHT OF SAID MIXTURE FOR A MINIMUM PERIOD OF ONE HOUR IN THE PRESENCE OF EXCESS FLUID; EVAPORATING THE DIGESTED MIXTURE TO DRYNESS; CALCINING THE RESIDUE AT A TEMPERATURE IN THE RANGE OF 500 TO 1100* F. SO AS TO DRIVE OFF ANY REMAINING VOLATILE MATERIALS; AND COMMINUTING THE CALCINED RESIDUE.
Claim 3
Dependent Claim
69 words
A DEHYDROGENATION CATALYST MADE BY THE PROCESS OF CLAIM 1 IN WHICH THE IRON COMPOUND IS A MAJOR PROPORTION OF SAID MIXTURE, THE COMPOUND OF AT LEAST ONE METAL SELECTED FROM THE GROUP CONSISTING OF CHROMIUM, MOLYBDENUM, TUNGSTEN, URANIUM, AND VANADIUM IS A MINOR PROPORTION UP TO A TOTAL OF 47 WEIGHT PER CENT, AND THE POTASSIUM COMPOUND IS IN THE RANGE OF 1 TO 15 WEIGHT PER CENT.
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) | 1957-01-11 | 1957-07-13 | 1958-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-01-11 | 1961-07-13 | 1962-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-01-11 | 1965-07-13 | 1966-01-12 | $7700.00 | Window Closed / Lapsed |