US2945823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized dehydrogenation catalyst
Assignee: Houdry Process Corp
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Filing: 1957-05-22
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Granted: 1960-07-19
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Expires: 1977-05-22
Abstract
No abstract record available.
Inventors
- 👤 Edward B Cornelius
- 👤 Jr Thomas H Milliken
- 👤 Mills George Alexander
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:25
CPC Classifications
C; C07; C07B; C07B35/00; C07B35/04; B; B01; B01J; B01J23/00; B01J23/16; B01J23/24; B01J23/26; C07C; C07C5/00; C07C5/32; C07C5/327; C07C5/333; C07C5/3332; C07C2521/00; C07C2521/02; C07C2521/04; C07C2523/00; C07C2523/16; C07C2523/24; C07C2523/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
152 words
THE METHOD OF PREPARING A STABILIZED CATALYST CHARACTERIZED BY THE PRESENCE OF A MINOR AMOUNT OF CHROMIA IN A PREDOMINANTLY ALUMINA CARRIER, COMPRISING, DISPERSING A SWELLING, WATER-DISPERSIBLE SODIUM BENTONITE IN A DILUTE SOLUTION OF AWUEOUS NITRIC ACID, FORMING A MIXTURE OF ALUMINA TRIHYDRATE POWDER AND SAID DISPERSION OF BENTONITE IN AQUEOUS NITRIC ACID, SAID MIXTURE CONTAINING SUFFICIENT BENTONITE TO PROVIDE FROM 0.5% TO 2% BENTONITE IN THE ALUMINA, SUBJECTING SAID MIXTURE TO EXTRUSION TO FROM PELLETS BY AN ELEVATED TEMPERATURE PARTIAL DEHYALUMINA PELLETS BY AN ELEVATED TEMPERATURE PARTIAL DEHYDRATION TREATMENT, REDUCING THE SURFACE AREA OF THE GAMMA ALUMINA PELLETS TO THE RANGE FROM ABOUT 60M.2/G. TO ABOUT 100M.2/G. BY TREATMENT AT TEMPERATURE CONDITIONS ALUMINA, SAID ALUMINA PELLETS CONSTITUTING STABILIZED ALUMORE SEVERE THAN EMPLOYED IN PREPARING SAID GAMMA MINA CARRIER PARTICLES, IMPREGNATING THE STABILIZED ALUMINA CARRIER PARTICLES OF REDUCED SURFACE AREA WITH CHROMIC ACID SOLUTION, AND CALCINING THE CHROMIC ACID IMPREGNATED ALUMINA PELLETS.
Claim 2
Independent Claim
152 words
THE METHOD OF PREPARING A STABILIZED CATALYST CHARACTERIZED BY THE PRESENCE OF A MINOR AMOUNT OF CHROMIA IN A PREDOMINANTLY ALUMINA CARRIER, COMPRISING, DISPERSING A SWELLING, WATER-DISPERSIBLE SODIUM BENTONITE IN A DILUTE SOLUTION OF AWUEOUS NITRIC ACID, FORMING A MIXTURE OF ALUMINA TRIHYDRATE POWDER AND SAID DISPERSION OF BENTONITE IN AQUEOUS NITRIC ACID, SAID MIXTURE CONTAINING SUFFICIENT BENTONITE TO PROVIDE FROM 0.5% TO 2% BENTONITE IN THE ALUMINA, SUBJECTING SAID MIXTURE TO EXTRUSION TO FROM PELLETS BY AN ELEVATED TEMPERATURE PARTIAL DEHYALUMINA PELLETS BY AN ELEVATED TEMPERATURE PARTIAL DEHYDRATION TREATMENT, REDUCING THE SURFACE AREA OF THE GAMMA ALUMINA PELLETS TO THE RANGE FROM ABOUT 60M.2/G. TO ABOUT 100M.2/G. BY TREATMENT AT TEMPERATURE CONDITIONS ALUMINA, SAID ALUMINA PELLETS CONSTITUTING STABILIZED ALUMORE SEVERE THAN EMPLOYED IN PREPARING SAID GAMMA MINA CARRIER PARTICLES, IMPREGNATING THE STABILIZED ALUMINA CARRIER PARTICLES OF REDUCED SURFACE AREA WITH CHROMIC ACID SOLUTION, AND CALCINING THE CHROMIC ACID IMPREGNATED ALUMINA PELLETS.
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) | 1963-07-19 | 1964-01-18 | 1964-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-07-19 | 1968-01-18 | 1968-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-07-19 | 1972-01-18 | 1972-07-19 | $7700.00 | Window Closed / Lapsed |