US3024084A
Expired / Lapsed
US
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Separation of platinum from other metals
Assignee: Huntington Alloys Corp
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Filing: 1959-10-26
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Granted: 1962-03-06
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Expires: 1979-10-26
Abstract
No abstract record available.
Inventors
- 👤 Alan R Raper
- 👤 Francis S Clements
- 👤 Samuel J R Fothergill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 07:04
CPC Classifications
C; C01; C01G; C01G55/00; C01G55/001; C22; C22B; C22B11/00; C22B11/04; C22B3/00; C22B3/20; C22B3/26; C22B3/32; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
IN THE PROCESS FOR SEPARATING PLATINUM AS AMMONIUM CHLOROPLATINATE FROM AQUEOUS ACID CHLORIDE PLATI NUM SOLUTIONS CONTAMINATED WITH OTHER PLATINUM GROUP METALS IN SOLUTION WHEREIN THE SOLUTION CONTAINS THE PLATINUM GROUP METALS OTHER THAN PLATINUM IN VALENCE STATES CHARACTERIZED BY SOLUBILITY OF THE AMMONIUM ACID SALTS OF SAID METALS IN WATER AND PLATINUM IN THE PLATINIC VALENCE STATE, THE IMPROVEMENT COMPRISING ADDING TO SAID PLATINUM SOLUTION A WATER SOLUBLE HYDROLYZABLE AMIDE, PRECIPITATING PLATINUM FROM SAID SOLUTION AS AMMONIUM CHLOROPLATINATE WHILE HYDROLYZINE SAID AMIDE IN THE PRESENCE OF EXCESS HYDROCHLORIC ACID AND, AFTER SUBSTANTIAL COMPLETION OF THE PRECIPITATION, PROMPTLY RECOVERING THE PRECIPITATED AMMONIUM CHLOROPLATINATE FROM SAID SOLUTION.
Claim 2
Dependent Claim
106 words
IN THE PROCESS FOR SEPARATING PLATINUM AS AMMONIUM CHLOROPLATINATE FROM AQUEOUS ACID CHLORIDE PLATI NUM SOLUTIONS CONTAMINATED WITH OTHER PLATINUM GROUP METALS IN SOLUTION WHEREIN THE SOLUTION CONTAINS THE PLATINUM GROUP METALS OTHER THAN PLATINUM IN VALENCE STATES CHARACTERIZED BY SOLUBILITY OF THE AMMONIUM ACID SALTS OF SAID METALS IN WATER AND PLATINUM IN THE PLATINIC VALENCE STATE, THE IMPROVEMENT COMPRISING ADDING TO SAID PLATINUM SOLUTION A WATER SOLUBLE HYDROLYZABLE AMIDE, PRECIPITATING PLATINUM FROM SAID SOLUTION AS AMMONIUM CHLOROPLATINATE WHILE HYDROLYZINE SAID AMIDE IN THE PRESENCE OF EXCESS HYDROCHLORIC ACID AND, AFTER SUBSTANTIAL COMPLETION OF THE PRECIPITATION, PROMPTLY RECOVERING THE PRECIPITATED AMMONIUM CHLOROPLATINATE FROM SAID SOLUTION.
References Cited (Backward Citations)
US2726141A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-03-05 | 1965-09-04 | 1966-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-05 | 1969-09-04 | 1970-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-05 | 1973-09-04 | 1974-03-06 | $7700.00 | Window Closed / Lapsed |