US3100683A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adsorption of cerium values from aqueous solutions
Assignee: Individual
•
Filing: 1962-07-18
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Granted: 1963-08-13
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Expires: 1982-07-18
Abstract
No abstract record available.
Inventors
- 👤 Francis P Roberts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:00
CPC Classifications
C; C01; C01F; C01F17/00; C01F17/10; C01F17/13
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A PROCESS OF RECOVERING CERIUM VALUES FROM A AQUEOUS SOLUTION, COMPRISING MIXING FROM 10 TO 200 GRAMS OF LEAD PEROXIDE WITH EACH LITER OF A STRONG-BASE ANION EXCHANGE RESIN; PASSING AN ABOUT 8 M NITRIC ACID OVER SAID RESIN TO CONVERT THE LATTER TO THE NITRATE FORM; PROVIDING A NITRIC ACID CONCENTRATION OF BETWEEN 2 AND 13 M IN A CERIUM (III)-CONTAINING FEED SOLUTION, WHEREBY A CERIUM-NITRATE COMPLEX IS FORMED; CONTACTING THE RESIN WITH SAID FEED SOLUTION WHEREBY THE CERIUM VALUES ARE PERFERENTIALLY TAKEN UP BY SAID RESIN; SEPARATING THE RESIN FROM THE CERIUM-DEPLETED AQUEOUS SOLUTION; AND ELUTING THE CERIUM VALUES FROM THE RESIN WITH MINERAL ACID SELECTED FROM THE GROUP CONSISTING OF 3 TO 5 M HYDROCHLORIC ACID AND 0.5 TO 1.5 M NITRIC ACID.
Claim 2
Dependent Claim
126 words
A PROCESS OF RECOVERING CERIUM VALUES FROM A AQUEOUS SOLUTION, COMPRISING MIXING FROM 10 TO 200 GRAMS OF LEAD PEROXIDE WITH EACH LITER OF A STRONG-BASE ANION EXCHANGE RESIN; PASSING AN ABOUT 8 M NITRIC ACID OVER SAID RESIN TO CONVERT THE LATTER TO THE NITRATE FORM; PROVIDING A NITRIC ACID CONCENTRATION OF BETWEEN 2 AND 13 M IN A CERIUM (III)-CONTAINING FEED SOLUTION, WHEREBY A CERIUM-NITRATE COMPLEX IS FORMED; CONTACTING THE RESIN WITH SAID FEED SOLUTION WHEREBY THE CERIUM VALUES ARE PERFERENTIALLY TAKEN UP BY SAID RESIN; SEPARATING THE RESIN FROM THE CERIUM-DEPLETED AQUEOUS SOLUTION; AND ELUTING THE CERIUM VALUES FROM THE RESIN WITH MINERAL ACID SELECTED FROM THE GROUP CONSISTING OF 3 TO 5 M HYDROCHLORIC ACID AND 0.5 TO 1.5 M NITRIC ACID.
References Cited (Backward Citations)
US2636044A
Cited
US2897050A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-08-12 | 1967-02-11 | 1967-08-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-08-12 | 1971-02-11 | 1971-08-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-08-12 | 1975-02-11 | 1975-08-13 | $7700.00 | Window Closed / Lapsed |