US3037841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for separating ions by ion exchange
Assignee: Individual
•
Filing: 1958-08-19
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Granted: 1962-06-05
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Expires: 1978-08-19
Abstract
No abstract record available.
Inventors
- 👤 Krumholz Pawel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:48
CPC Classifications
C; C22; C22B; C22B3/00; C22B3/20; C22B3/42; C01; C01F; C01F17/00; C01F17/10; C01F17/13; C01F17/20; C01F17/282; Y; Y02; Y02P; Y02P10/00; Y02P10/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
163 words
IN A METHOD OF SEPARATING RARE EARTH AND YTTRIUM IONS FROM EACH OTHER, THE STEPS OF ELUTING A SULFONATED POLYSTYRENE-DIVINYLBENZENE COPOLYMER ION EXCHANGE RESIN BED IN CATIONIC FORM OF 50-200 MESH HAVING A LENGTH OF 3-4 FET AND A DIAMETER OF 4-20 INCHES WHEN THE MESH SIZE IS 100-200 AND HAVING A LENGTH OF 8-12 FEET AND A DIAMETER OF 4-20 INCHES WHEN THE MESH SIZE IS 50-100 WHICH ION EXCHANGE RESIN BED IS AT LEAST 85% SATURATED WITH A MIXTURE OF RARE EARTH AND YTTRIUM IONS WITH A SOLUTION OF A COMPLEXING AGENT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL AND AMMONIUM SALTS OF ETHYLENEDIAMINE TETRAACETIC ACID, NITRILOTRIACETIC ACID, HYDROXYETHYLENEDIAMINE TRIACETIC ACID, DIETHYLENETRIAMINE PENTAACETIC ACID AND DIAMINOCYCLOHEXANE TETRAACETIC ACID, WHEREBY SUCCESSIVE FRACTIONS EACH CONTAINING MAINLY ONE OF SAID RARE EARTH AND YTTRIUM IONSTO THE MAIN EXCLUSION OF THE OTHERS IS FORMED; AND SEPARATELY COLLECTING EACH OF SAID SUCCESSIVE FRACTIONS, THEREBY SUBSTANTIALLY SEPARATELY RECOVERING EACH OF SAID RARE EARTH AND YTTRIUM IONS.
Claim 2
Dependent Claim
163 words
IN A METHOD OF SEPARATING RARE EARTH AND YTTRIUM IONS FROM EACH OTHER, THE STEPS OF ELUTING A SULFONATED POLYSTYRENE-DIVINYLBENZENE COPOLYMER ION EXCHANGE RESIN BED IN CATIONIC FORM OF 50-200 MESH HAVING A LENGTH OF 3-4 FET AND A DIAMETER OF 4-20 INCHES WHEN THE MESH SIZE IS 100-200 AND HAVING A LENGTH OF 8-12 FEET AND A DIAMETER OF 4-20 INCHES WHEN THE MESH SIZE IS 50-100 WHICH ION EXCHANGE RESIN BED IS AT LEAST 85% SATURATED WITH A MIXTURE OF RARE EARTH AND YTTRIUM IONS WITH A SOLUTION OF A COMPLEXING AGENT SELECTED FROM THE GROUP CONSISTING OF ALKALI METAL AND AMMONIUM SALTS OF ETHYLENEDIAMINE TETRAACETIC ACID, NITRILOTRIACETIC ACID, HYDROXYETHYLENEDIAMINE TRIACETIC ACID, DIETHYLENETRIAMINE PENTAACETIC ACID AND DIAMINOCYCLOHEXANE TETRAACETIC ACID, WHEREBY SUCCESSIVE FRACTIONS EACH CONTAINING MAINLY ONE OF SAID RARE EARTH AND YTTRIUM IONSTO THE MAIN EXCLUSION OF THE OTHERS IS FORMED; AND SEPARATELY COLLECTING EACH OF SAID SUCCESSIVE FRACTIONS, THEREBY SUBSTANTIALLY SEPARATELY RECOVERING EACH OF SAID RARE EARTH AND YTTRIUM IONS.
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) | 1965-06-04 | 1965-12-04 | 1966-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-06-04 | 1969-12-04 | 1970-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-06-04 | 1973-12-04 | 1974-06-05 | $7700.00 | Window Closed / Lapsed |