For Steel Pickling

Recycling Acid Using the World Standard APU®

The most widely used acid recycling system in the world, the Eco-Tec Acid Purification Unit, APU®, eliminates bath dumping by removing metals as they dissolve into the stainless steel pickling acid. Since 30% – 70% of original acid is lost in bath dumping before being used, the APU® dramatically reduces acid and related waste treatment expenses.

With consistent bath chemistry, stainless steel pickling performance is assured. With metals at low levels, further improvements are realized in cooler running temperatures and reduced generation of sludge and fumes. The APU® uses a resin sorption process and simple water wash to recover acid. The net result is a virtually continuous process for acid purification.

The Eco-Tec MicroPur™ is a version of the APU® designed in a range of sizes to accommodate the small to mid-sized pickler.

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  • Greater Efficiency – Reduced acid purchases and neutralization costs
  • Lower Operating Costs – Elimination of bath dumping, clean-out and reformulation labor
  • Greater Performance – Improved product quality and consistency of acid composition
  • Easy Installation – Pre-assembled, skid-mounted, standard Eco-Tec materials/instruction
  • Safe Design – Elimination/reduction of hazardous acid tank cleaning by workers
  • Safe System Design – Cooling of acid prevents dangerous reaction of hot nitric acid and resin without need for sensors, controls, procedures to detect and respond once dangerous reaction starts
  • Proven – Eco-Tec is the original developer of Acid Purification Systems using resin technology and continues to be the worldwide leader.
  • No chemicals for operation of the APU®
  • Low consumption of water, electricity, air
  • Pre-assembled, skid-mounted equipment is easy to install using standard materials and Eco-Tec instructions.

More APU® Stainless Steel Information

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