Patents Assigned to International Hydronics Corporation
  • Electrolytic reduction of nitrate from solutions of alkali metal hydroxides contaminated by oxidizing transition metal ions
    Patent number: 4632737
    Abstract: Alkali metal hydroxide solutions containing substantial amounts of nitrate and nitrite which are contaminated by chromate are electrolytically converted to the corresponding hydroxides. The interference of the chromate with the normal electrolytic process is voided by adding bismuth ion to the solution and reversing the current direction at predetermined intervals.
    Type: Grant
    Filed: February 28, 1986
    Date of Patent: December 30, 1986
    Assignee: International Hydronics Corporation
    Inventor: Albert B. Mindler