Selective Resin Ion Exchange Systems (Retardation or Selective Resin Ion Exchange Processes)

A method and system of separating an acid from an acid-salt solution produced in an electrochemical system (for example in an aluminum eloxal coating bath) using an ion exchange resin bed, by processing the acid-salt solution through the ion exchange resin bed such that the acid is retarded at the bottom of the bed and a de-acidified salt solution is recovered from the top of the bed. After removing the salt solution from the bed, the acid is recovered by back-flushing the resin bed with water.

We are using this technology for recovering the “sulfuric acid in aluminum eloxal coating bath processes”, “chromic acid from hard chrome plating baths”, “phosphoric acid from phosphating baths”, etc……