For Aluminum Anodizing

Consistently Maintain High Anodized Aluminum Quality – Economically

AnoPur™  is a version of Eco-Tec’s Acid Purification Systems specifically adapted for purification of sulphuric acid used in aluminum anodizing.

Hundreds of AnoPur units are in operation in anodizing facilities around the world.

The Anopur is used to continuously remove dissolved aluminum from sulfuric acid anodizing baths in order to maintain the dissolved aluminum at a consistently low concentration.

How it Works

The AnoPur is a factory assembled, skid-mounted equipment package featuring a resin bed, piping, valves and controls. It is connected to an anodizing tank (or multiple tanks) and continuously operates to remove dissolved aluminum from the tank. It does this using a simple process which involves passing the anodizing solution through a resin bed where the sulphuric acid and dissolved aluminum are separated. Periodically the resin is automatically “regenerated” using only water.


  • Consistent, predictable anodic film characteristics (thickness, density) to assure consistent appearance. This is especially critical in maintaining consistent color in subsequent electrolytic color or organic dyeing steps.
  • Consistent, predictable current and voltage requirements. This allows for full automation of the anodizing process.
  • Lower electrical current and cooling requirements due to the higher conductivity of purified anodizing solutions
  • Eliminates downtime for dumping and reformulating anodizing baths.
  • Reduces acid purchases and waste treatment costs
  • A range of compact, standard models to provide the most economical package for any anodizer
  • Uses Eco-Tec’s highly efficient Recoflo ion exchange process for the greatest acid savings and minimal waste
  • Complete factory assembly and testing in Eco-Tec’s ISO registered facility assures fast start-up and reliable operation
  • Proven, quality, corrosion resistant components and materials selected for long service life in an anodizing facility

Download more AnoPur Information

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