Treatment of waste hci pickle liquor
Abstract
Abstract THIS INVENTION IS DIRECTED TO THE OXIDATION OF FERROUS CHLORIDE IN LIQUID AQUEOUS SOLUTION, SUCH AS WASTE HC1 PICKLE LIQUOR, TO A SOLUTION CONTAINING FERRIC CHLORIDE BY INTIMATELY INTERMINGLING SAID FERROUS CHLORIDE SOLUTION WITH FREE OXYGEN (1) IN THE PRESENCE OF A DISSOLVED PROMOTER CATION SELECTED FROM THE CLASS OF AMMONIUM, CHROMIUM, COBALT, COPPER, MANGANESE, NICKEL, ZINC OR MIXTURES THEREOF AT AN ELEVATED TEMPERATURE OR (2) IN THE ABSENCE OF PROMOTER, AT SUPERATMOSPHERIC PRESSURE AND AT A TEMPERATURE OF AT LEAST ABOUT 175*F., FOR A TIME SUFFICIENT TO OBTAIN A FERRIC CHLORIDE CONTAINING SOLUTION. A MIXTURE OF AMMONIUM IONS AND CUPRIC IONS IS THE PREFERRED PROMOTER. THE INVENTION IS ALSO DIRECTED TO PRODUCING HYDROCHLORIC ACID FROM THE FERRIC CHLORIDE SOLUTION OBTAINED BY THE AFORESAID OXIDATION PROCESS BY THE SOLUTION AT A TEMPERATURE OF ABOUT 250-400* F. TO OBTAIN A HC1 GAS-WATER VAPOR OVERHEAD AND A BOTTOMS AQUEOUS SLURRY OF IRON OXIDE.
Inventors
- 👤 Geza L Kovacs
Bibliographic Details
Claims Analysis
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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) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |