Mixed Sulfate Salts
| Item | Quantities Produced MTPY |
|---|---|
| Fe2(SO4)3 Ferric Sulfate* | 74,100 |
| Al2(SO4)3 Aluminum Sulfate | 45,300 |
| MgSO4 Magnesium Sulfate | 60,600 |
| CaSO4 Calcium Sulfate | 1,600 |
| K2SO4 Potassium Sulfate | 600 |
| Na2SO4 Sodium Sulfate | 7,100 |
| MnSO4 Manganese Sulfate | 3,300 |
| Total Sulfate Salts (Design Basis) | 192,600 |
| Contained water of crystallization | 449,400 |
| Total ME Sulfate Salts (Hydrated) | 642,000 |
• The mixed sulfate salt is a valuable byproduct that could be processed to final products. The mixture contains:
- Ferric Sulfate: which is used in water treatment as flocculate.
- Ferrous Sulfate Hepta-hydrate: which is used as a fertilizer, supplying secondary nutrients to the plants.
- Aluminium Sulfate: which is a well-known flocculate and disinfectant.
- Magnesium Sulfate: which is an important secondary nutrient fertilizer.
- Manganese sulfate: which is an important secondary nutrient fertilizer.
The resin used in the CIX process for the purification of El Wady Phosphoric Acid has to be regenerated by washing with Sulfuric Acid to get rid of the metallic impurities that are adhered to it. This results in a valuable effluent byproduct stream loaded with mixed metallic elements in the form of soluble sulfate salts.
Minor Elements Sulfate Stream Composition
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