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Exhibit 3-25. Information and Data for Ion Exchange Resins Used for Metal Finishing Applications Plating Sol. Resin Type Capacity Regenerant lbs. Metal/ft3 Watts Nickel strong acid cation 1.8 H2SO4 or HCl Sulfamate Nickel strong acid cation 1.8 sulfamic acid Acid Copper strong acid cation 2.0 H2SO4 or HCl Acid Zinc strong acid cation 1.8 HCl Cyanide Copper1 strong acid cation 1.5 H2SO4 Cyanide Zinc1 strong acid cation 1.2 H2SO4 or HCl Cyanide Cadmium1 strong acid cation 1.3 H2SO4 Cyanide1 medium base anion 1.6 NaOH Tin/Lead Fluoroborate strong acid cation 6.5 methyl-sulfamic acid Chrome Plating Cation strong acid cation 1.7 H2SO4 or HCl Chrome Plating Anion medium base anion 3.1 NaOH Final Polishing selective cation 2.7 H2SO4 or HCl/NaOH1Cyanide metal solutions are treated first by a strong acid cation resin (cyanide complex destruction and metal recovery) followed by a medium base anion resin (cyanide recovery). This process is discussed in Section 3.4.3.
Source: Based on data provided by Dr. Fred Reinhard, Kinetic Recovery Corporation.