Patents Assigned to Instytut Mechaniki Precyzyjnes
  • Apparatus for recovery of metals from metal plating baths and neutralizing toxic effluents therefrom
    Patent number: 4171255
    Abstract: Method for recovering metals from cyanide and hexavalent chromium plating baths comprising immersing plated articles in a reclaiming bath containing an aldehyde or an aldehyde percursor, and optionally an oxidizing agent, to precipitate the excess metal in the residual plating bath in the form of free metal or metal hydroxide and to decompose the cyanide and to reduce the hexavalent chromium to trivalent chromium. The plating bath and reclaiming bath are regenerated. Apparatus is provided to effect this process.
    Type: Grant
    Filed: November 15, 1977
    Date of Patent: October 16, 1979
    Assignee: Instytut Mechaniki Precyzyjnes
    Inventors: Franciszek Tuznik, Andrzej Lis