US2771193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ion exclusion
Assignee: Dow Chemical Co
•
Filing: 1953-10-19
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Granted: 1956-11-20
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Expires: 1973-10-19
Abstract
No abstract record available.
Inventors
- 👤 Donald W Simpson
- 👤 William C Bauman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:48
CPC Classifications
B; B01; B01J; B01J39/00; B01J39/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
416 words
IN A METHOD FOR TREATING AN AQUEOUS STARTING SOLUTION CONTAINING A HIGHLY IONIZED SOLUTE HAVING AN IONIZATION CONSTANT AT LEAST AS GREAT AS 5 X 10-2 AND A LESS EXTENSIVELY IONIZED SOLUTE THAT IS CAPABLE OF BEING ABSORBED BY AN ION EXCHANGE RESIN AND THAT HAS AN IONIZATION CONSTANT NOT GREATER THAN 2X 10-1 AND NOT MORE THAN 70 PERCENT AS GREAT AS THAT OF THE HIGHLY IONIZED SOLUTE TO SEPARATE A LIQUOR FRACTION CONTAINING THE LESS IONIZED SOLUTE IN A CONCENTRATION HIGHER THAN IN THE STARTING SOLUTION AND IN A FORM SUBSTANTIALLY FREE OF THE HIGHLY IONIZED SOLUTE, WHEREIN THERE IS CARRIED OUT A FIRST CYCLE OF OPERATIONS OF FEEDING TO A BED OF AN ION EXCHANGE RESIN, HAVING AN ION IDENTICAL WITH AN ION OF THE HIGHLY IONIZED SOLUTE, A SUFFICIENT AMOUNT OF SUCH AQUEOUS STARTING SOLUTION, CONTAINING THE HIGHLY IONIZED SOLUTE IN AT LEAST AS HIGH AS 1-NORMAL CONCENTRATION, SO THAT PART OF THE LESS IONIZED SOLUTE IS PREFERENTIALLY ABSORBED BY THE RESIN LEAVING THE HIGHLY IONIZED SOLUTE AND THE REMAINDER OF THE LESS IONIZED SOLUTE IN SURROUNDING LIQUOR, FEEDING WATER TO THE BED TO DISPLACE LIQUID THEREFROM, COLLECTING SUCCESSIVE FRACTIONS OF THE DISPLACED EFFLUENT LIQUID, WHEREBY TAINING THE HIGHLY IONIZED SOLUTE IN A FORM SUBSTANTIALLY FREE OF THE LESS IONIZED SOLUTE, A MIXED FRACTION F2 OF THE EFFLUENT LIQUID CONTAINING BOTH OF THE SOLUTES, AND A FRACTION F3 OF THE EFFLUENT LIQUID CONTAINING THE LESS IONIZED SOLUTE IN A FORM SUBSTANTIALLY FREE OF THE HIGHLY IONIZED SOLUTE, THE STEPS OF CARRYING OUT A SECOND OPERATING CYCLE WHICH COMPRISES FEEDING A FORE-PORTION OF SAID EFFLUENT LIQUOR FRACTION F2 TO THE BED OF ION EXCHANGE RESIN, THEN FEEDING A FURTHER AMOUNT OF THE STARTING SOLUTION, CONTAINING BOTH OF THE SOLUTES WITH THE HIGHLY IONIZED SOLUTE IN AT LEAST AS HIGH AS 1-NORMAL CONCENTRATION, TO THE BED, NEXT FEEDING TO THE BED A LATER PORTION OF THE EFFLUENT LIQUOR FRACTION F2, NEXT FEEDING TO THE BED AT LEAST A PORTION OF SAID EFFLUENT LIQUOR FRACTION F3, AND NEXT AGAIN FEEDING WATER TO THE BED AND, COLLECTING SUCCESSIVE PORTIONS OF THE EFFLUENT LIQUOR SIMILAR IN KIND TO THOSE COLLECTED IN THE FIRST CYCLE, INCLUDING A PORTION OF EFFLUENT LIQUOR CONTAINING THE LESS IONIZED SOLUTE IN CONCENTRATION HIGHER THAN IN THE STARTING SOLUTION, REPEATING AT LEAST ONCE THIS SECOND CYCLE OF OPERATIONS AND WITHDRAWING A PORTION OF THE EFFLUENT LIQUOR FRACTION F3 WHICH CONTAINS THE LESS IONIZED SOLUTE IN A CONCENTRATION HIGHER THAN IN THE STARTING SOLUTION.
Claim 2
Dependent Claim
416 words
IN A METHOD FOR TREATING AN AQUEOUS STARTING SOLUTION CONTAINING A HIGHLY IONIZED SOLUTE HAVING AN IONIZATION CONSTANT AT LEAST AS GREAT AS 5 X 10-2 AND A LESS EXTENSIVELY IONIZED SOLUTE THAT IS CAPABLE OF BEING ABSORBED BY AN ION EXCHANGE RESIN AND THAT HAS AN IONIZATION CONSTANT NOT GREATER THAN 2X 10-1 AND NOT MORE THAN 70 PERCENT AS GREAT AS THAT OF THE HIGHLY IONIZED SOLUTE TO SEPARATE A LIQUOR FRACTION CONTAINING THE LESS IONIZED SOLUTE IN A CONCENTRATION HIGHER THAN IN THE STARTING SOLUTION AND IN A FORM SUBSTANTIALLY FREE OF THE HIGHLY IONIZED SOLUTE, WHEREIN THERE IS CARRIED OUT A FIRST CYCLE OF OPERATIONS OF FEEDING TO A BED OF AN ION EXCHANGE RESIN, HAVING AN ION IDENTICAL WITH AN ION OF THE HIGHLY IONIZED SOLUTE, A SUFFICIENT AMOUNT OF SUCH AQUEOUS STARTING SOLUTION, CONTAINING THE HIGHLY IONIZED SOLUTE IN AT LEAST AS HIGH AS 1-NORMAL CONCENTRATION, SO THAT PART OF THE LESS IONIZED SOLUTE IS PREFERENTIALLY ABSORBED BY THE RESIN LEAVING THE HIGHLY IONIZED SOLUTE AND THE REMAINDER OF THE LESS IONIZED SOLUTE IN SURROUNDING LIQUOR, FEEDING WATER TO THE BED TO DISPLACE LIQUID THEREFROM, COLLECTING SUCCESSIVE FRACTIONS OF THE DISPLACED EFFLUENT LIQUID, WHEREBY TAINING THE HIGHLY IONIZED SOLUTE IN A FORM SUBSTANTIALLY FREE OF THE LESS IONIZED SOLUTE, A MIXED FRACTION F2 OF THE EFFLUENT LIQUID CONTAINING BOTH OF THE SOLUTES, AND A FRACTION F3 OF THE EFFLUENT LIQUID CONTAINING THE LESS IONIZED SOLUTE IN A FORM SUBSTANTIALLY FREE OF THE HIGHLY IONIZED SOLUTE, THE STEPS OF CARRYING OUT A SECOND OPERATING CYCLE WHICH COMPRISES FEEDING A FORE-PORTION OF SAID EFFLUENT LIQUOR FRACTION F2 TO THE BED OF ION EXCHANGE RESIN, THEN FEEDING A FURTHER AMOUNT OF THE STARTING SOLUTION, CONTAINING BOTH OF THE SOLUTES WITH THE HIGHLY IONIZED SOLUTE IN AT LEAST AS HIGH AS 1-NORMAL CONCENTRATION, TO THE BED, NEXT FEEDING TO THE BED A LATER PORTION OF THE EFFLUENT LIQUOR FRACTION F2, NEXT FEEDING TO THE BED AT LEAST A PORTION OF SAID EFFLUENT LIQUOR FRACTION F3, AND NEXT AGAIN FEEDING WATER TO THE BED AND, COLLECTING SUCCESSIVE PORTIONS OF THE EFFLUENT LIQUOR SIMILAR IN KIND TO THOSE COLLECTED IN THE FIRST CYCLE, INCLUDING A PORTION OF EFFLUENT LIQUOR CONTAINING THE LESS IONIZED SOLUTE IN CONCENTRATION HIGHER THAN IN THE STARTING SOLUTION, REPEATING AT LEAST ONCE THIS SECOND CYCLE OF OPERATIONS AND WITHDRAWING A PORTION OF THE EFFLUENT LIQUOR FRACTION F3 WHICH CONTAINS THE LESS IONIZED SOLUTE IN A CONCENTRATION HIGHER THAN IN THE STARTING SOLUTION.
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) | 1959-11-20 | 1960-05-21 | 1960-11-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-20 | 1964-05-21 | 1964-11-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-20 | 1968-05-21 | 1968-11-20 | $7700.00 | Window Closed / Lapsed |