Process for recovering sulfate and chloride salts from wastewater, mixed salts, and brines
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United States of America Patent
Stats
-
Oct 25, 2016
Grant Date -
Sep 29, 2016
app pub date -
Mar 24, 2016
filing date -
Mar 25, 2015
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A process is described for recovering alkali-chloride and alkali-sulfate salts from a salt solution. The salt solution comprises alkali metal, chloride and sulfate ions and is directed to a hydrous salt crystallization unit which crystallizes hydrated sulfate salts that comprise sulfate and at least one alkali metal. A purged solution from the hydrous salt crystallization unit is directed to a chloride salt crystallization unit while the hydrated sulfate salt crystals are melted to form an aqueous sulfate solution which is directed to a sulfate crystallization unit. Anhydrous sulfate salts are crystallized from the aqueous sulfate solution to form sulfate salt crystals comprising sulfate and at least one alkali metal. In the chloride salt crystallization unit, chloride salt is crystallized to form chloride salt crystals. A purge from the chloride salt crystallization unit is directed to the hydrous salt crystallization unit.
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International Classification(s)
- 2016 Application Filing Year
- C02F Class
- 1880 Applications Filed
- 1218 Patents Issued To-Date
- 64.79 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 1 Citation Count
- C02F Class
- 21.11 % this patent is cited more than
- 9 Age
Maintenance Fees
| Fee | Large entity fee | small entity fee | micro entity fee | due date |
|---|---|---|---|---|
| 11.5 Year Payment | $7400.00 | $3700.00 | $1850.00 | Apr 25, 2028 |
