Eco-Tec recovery systems offer a simple, economical approach to purifying acid bleed streams, allowing their recycle and reuse. The separated metals can then be cost effectively reclaimed following acid-purification treatment.

Fully Assembled APU®

For years, electro refining and electro winning operations for producing high-purity copper have relied on Eco-Tec’s systems to continually remove metal impurities from copper and zinc electrolyte bleed streams. The purified acid can then be recycled back to the tank house. This significantly reduces acid consumption and waste treatment expenses.

Strong mineral acids like sulfuric acid can be separated from dissolved metal salts using Eco-Tec’s technology. The process driving force is based on concentration differences and does not require high energy input. The System utilizes a unique resin sorbent process and simple water wash to remove acids such as sulfuric, hydrochloric, nitric, phosphoric, and hydrofluoric from aqueous solutions. Online bath purification — through Eco-Tec’s world-leading APU® (Acid Purification Unit) — is used in many industries from window manufacturers and steel mills to capacitor plants and copper refineries.


  • Reduced lime purchases.
  • Reduced waste treatment costs.
  • Reduced sulfuric acid purchases.
  • Increased electrolytic process efficiency (lower voltage/higher current efficiency).
  • Increased electrolyte purity and higher cathode purity by controlling contaminants in electrolyte.