US3306702A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removal of metal salt contaminants from acidic aqueous liquids
Assignee: ChampionX LLC
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Filing: 1962-06-18
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Granted: 1967-02-28
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Expires: 1982-06-18
Abstract
No abstract record available.
Inventors
- 👤 Odland Karsten
- 👤 Reed S Robertson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:57
CPC Classifications
C; C01; C01B; C01B17/00; C01B17/69; C01B17/90; C01B17/901; C01B17/904; B; B01; B01J; B01J41/00; B01J41/04; B01J41/05; C01B25/00; C01B25/16; C01B25/18; C01B25/234; C01B25/237; C01B25/238; Y; Y10; Y10S; Y10S423/00; Y10S423/01; Y10S423/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
IN A PROCESS FOR THE SEPARATION OF DISSOLVED SALTS SELECTED FROM THE GROUP CONSISTING OF IRON AND ALUMINUM SALTS FROM SOLUTIONS OF STRONG ACIDS SELECTED FROM THE GROUP CONSISTING OF SULFURIC AND PHOSPHORIC ACIDS BY SEQUENTIALLY CONTACTING SAID SOLUTIONS WITH A STRONG BASE ION EXCHANGE RESIN CONVERTED TO THE PHOSPHATE FORM WHEN PHOSPHORIC ACID IS TO BE PURIFIED AND TH SULFATE FORM WHEN SULFURIC ACID IS TO BE PURIFIED, AND THEN WITH WATER TO REGENERATE SAID RESIN AND PROVIDE AT LEAST ONE SALT-RICH, ACID-LEAN FRACTION, AND AT LEAST ONE ACID-RICH, SALT-LEAN FRACTION, SAID SALTS BEING CHARACTERIZED AS TENDING TO FORM INSOLUBLE PRECIPITATES WHEN SUBJECTED TO NON-ACIDIC MEDIA, THE IMPROVEMENT WHICH COMPRISES CONTACTING SAID STRONG BASE ANION EXCHANGE RESIN WITH THE SOLUTIONS IN THE PRESENCE OF A COMPLEXING AGENT SELECTED FROMTHE GROUP CONSISTING OF HYDROXY CARBOXYLIC ACID COMPLEXING AGENTS AND CONDENSED PHOSPHATES.
Claim 2
Dependent Claim
141 words
IN A PROCESS FOR THE SEPARATION OF DISSOLVED SALTS SELECTED FROM THE GROUP CONSISTING OF IRON AND ALUMINUM SALTS FROM SOLUTIONS OF STRONG ACIDS SELECTED FROM THE GROUP CONSISTING OF SULFURIC AND PHOSPHORIC ACIDS BY SEQUENTIALLY CONTACTING SAID SOLUTIONS WITH A STRONG BASE ION EXCHANGE RESIN CONVERTED TO THE PHOSPHATE FORM WHEN PHOSPHORIC ACID IS TO BE PURIFIED AND TH SULFATE FORM WHEN SULFURIC ACID IS TO BE PURIFIED, AND THEN WITH WATER TO REGENERATE SAID RESIN AND PROVIDE AT LEAST ONE SALT-RICH, ACID-LEAN FRACTION, AND AT LEAST ONE ACID-RICH, SALT-LEAN FRACTION, SAID SALTS BEING CHARACTERIZED AS TENDING TO FORM INSOLUBLE PRECIPITATES WHEN SUBJECTED TO NON-ACIDIC MEDIA, THE IMPROVEMENT WHICH COMPRISES CONTACTING SAID STRONG BASE ANION EXCHANGE RESIN WITH THE SOLUTIONS IN THE PRESENCE OF A COMPLEXING AGENT SELECTED FROMTHE GROUP CONSISTING OF HYDROXY CARBOXYLIC ACID COMPLEXING AGENTS AND CONDENSED PHOSPHATES.
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) | 1970-02-27 | 1970-08-29 | 1971-02-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-27 | 1974-08-29 | 1975-02-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-27 | 1978-08-29 | 1979-02-28 | $7700.00 | Window Closed / Lapsed |