Condensate polishing
Abstract
Abstract THIS INVENTION RELATES TO THE REGENERATION OF ANION EXCHANGE RESINS USED IN MIXED ION EXCHANGE RESIN BED DEMINERALIZERS WHEREIN THE RESINS ARE SEPARATED, THE ANION EXCHANGE RESIN FRACTION REGENERATED WITH AN ALKALI METAL COMPOUND, AND THE REGENERATED RESINS ADMIXED TO REFORM THE MIXED BED. SPECIFICALLY, THE INVENTION COMPRISES TREATMENT OF THE ANION EXCHANGE RESIN FRACTION AFTER REGENERATION TO REPLACE THE ALKALI METAL CATION ASSOCIATED WITH THE CATION EXCHANGE RESIN PRESENT IN THE ANION EXCHANGE RESIN FRACTION WITH AN ALKALINE EARTH METAL CATION SELECTED FROM THE GROUP CONSISTING OF CALCIUM, BARIUM, STONTIUM, AND MIXTURES THEREOF, AND REMOVING THE ALKALI METAL CATION FROM THE FRACTION PRIOR TO ADMIXTURE OF THE RESINS TO REFORM THE MIXED BED.
Inventors
- 👤 H Gustafson
- 👤 H Frazer
Bibliographic Details
Claims Analysis
Total Claims: 0References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-09 | 1976-07-10 | 1977-01-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-09 | 1980-07-10 | 1981-01-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-09 | 1984-07-10 | 1985-01-09 | $7700.00 | Window Closed / Lapsed |