US2603610A
Expired / Lapsed
US
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Preparation of a dehydrogenation catalyst
Assignee: Dow Chemical Co
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Filing: 1949-06-11
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Granted: 1952-07-15
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Expires: 1969-06-11
Abstract
No abstract record available.
Inventors
- 👤 Amos James Lawrence
- 👤 Lloyd H Silvernall
- 👤 Frederick J Soderquist
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 01:55
CPC Classifications
B; B01; B01J; B01J23/00; B01J23/70; B01J23/76; B01J23/84; B01J23/85; B01J23/86; B01J23/862; B01J37/00; B01J37/0009; B01J37/0018
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
101 words
THE METHOD OF PREPARING A DEHYDROGENATION CATALYST WHICH COMPRISES MIXING POTASSIUM CARBONATE, POTASSIUM DICHROMATE AND FERRIC OXIDE WITH FROM 3 TO 15 PER CENT OF THEIR WEIGHT OF A POWDERED METHYL CELLULOSE WHOSE 2 PER CENT SOLUTION IN WATER AT ROOM TEMPERATURE HAS A VISCOSITY FROM 2000 TO 3000 CENTIPOISES, AND WITH ENOUGH REFRACTORY CEMENT AND WATER TO MAKE A THICK EXTRUDABLE PASTE, EXTRUDING THE PASTE AS RODS AND CUTTING THE RODS TO FORM PELLETS, DEHYDRATING THE PELLETS, AND HEATING THE DEHYDRATED PELLETS IN STEAM AT FROM 600* TO 650* C. TO DECOMPOSE THE METHYL CELLULOSE AND TO ACTIVATE THE CATALYST.
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) | 1955-07-15 | 1956-01-14 | 1956-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-07-15 | 1960-01-14 | 1960-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-07-15 | 1964-01-14 | 1964-07-15 | $7700.00 | Window Closed / Lapsed |