Recovery of Waste Sulfuric Acid
A significant amount of TiO₂ pigments in the word is produced from Ilminite ore or titania slag using the sulfate process.
Waste products are weak sulfuric acid, iron sulfate and heavy metal sulfates.
SEP provides technology for recovery and recycling of sulfuric acid and for crystallization and separation of sulfates from sulfuric acid.
Using SEP’s evaporation and crystallization technology, pigment producers improve their
ecological footprint by using less raw materials (sulfuric acid) and reducing waste streams.
Related Technologies
Multiple Effect Evaporator (MEE)
Forced Circulation Evaporator / Crystalliser (FC)
Value
- Low concentration of impurities in product
sulfuric acid at 70% - High sulfuric acid recovery yield
- Minimized scaling resulting in minimum downtime
- Minimum operator attention due to automatic operation
- Low steam and electrical energy consumption
- Consideration of client-specific physical properties of waste acid
Process
- Reliable solids separation and handling
- Appropriate materials of construction considering temperatures, concentrations, and the highly corrosive nature of sulfuric acid
- Robust Forced Circulation Evaporators and Crystallizers
- High efficiency droplet separators
- Separation of sulfates by reconcentration as FeSO₄ x H₂O (Brown Salt) or by cooling crystallization as FeSO₄ x 7 H₂O (Green Salt).
Flow Diagram
Unique Solutions
to Complex Problems
Partner with us to solve your Technological and Chemical problems
with innovative applications of tried-and-true processes.
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