US3275567A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of preparing a sulfided platinum on carbon catalyst
Assignee: Engelhard Industries Inc
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Filing: 1963-06-27
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Granted: 1966-09-27
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Expires: 1983-06-27
Abstract
No abstract record available.
Inventors
- 👤 Carl D Keith
- 👤 Daniel L Bair
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 22:22
CPC Classifications
B; B01; B01J; B01J37/00; B01J37/20; B01J23/00; B01J23/38; B01J23/40; B01J23/42; B01J27/00; B01J27/02; B01J27/04; B01J27/043; B01J27/045; B01J21/00; B01J21/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
102 words
A METHOD FOR PREPARING A SULFIDE PLATINUM ON CARBON CATALYST WHICH COMPRISES ADMIXING PATICULATE CARBON WITH AN AQUEOUS SOLUTION OF A COMPOUND OF PLATINUM WITH PLATINUM IN THE TWO-VALENT STATE, TREATING THE RESULTANT SLURRY WITH AN ALKALINE MATERIAL TO EFFECT HYDROLYSIS AND DEPOSITION OF THE PLATINUM AS A PLUTINUM OXIDE ON THE CARBON SUPPORT, REDUCING THE SUPPORTED PLATINUM OXIDE TO METALLIC PLATINUM IN AN AQUEOUS SLURRY, TREATING THE METALLIC PLATINUM ON CARBON IN AN AQUEOUS SLURRY WITH A SULFIDING AGENT TO CONVERT THE PLATINUM ON CARBON TO A SULFIDE OF PLATINUM, AND SEPARATING THE CARBON PARTICLES HAVING THE SULFIDE OF PLATINUM THEREON.
Claim 2
Independent Claim
102 words
A METHOD FOR PREPARING A SULFIDE PLATINUM ON CARBON CATALYST WHICH COMPRISES ADMIXING PATICULATE CARBON WITH AN AQUEOUS SOLUTION OF A COMPOUND OF PLATINUM WITH PLATINUM IN THE TWO-VALENT STATE, TREATING THE RESULTANT SLURRY WITH AN ALKALINE MATERIAL TO EFFECT HYDROLYSIS AND DEPOSITION OF THE PLATINUM AS A PLUTINUM OXIDE ON THE CARBON SUPPORT, REDUCING THE SUPPORTED PLATINUM OXIDE TO METALLIC PLATINUM IN AN AQUEOUS SLURRY, TREATING THE METALLIC PLATINUM ON CARBON IN AN AQUEOUS SLURRY WITH A SULFIDING AGENT TO CONVERT THE PLATINUM ON CARBON TO A SULFIDE OF PLATINUM, AND SEPARATING THE CARBON PARTICLES HAVING THE SULFIDE OF PLATINUM THEREON.
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) | 1969-09-26 | 1970-03-28 | 1970-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-26 | 1974-03-28 | 1974-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-26 | 1978-03-28 | 1978-09-27 | $7700.00 | Window Closed / Lapsed |