Patents Assigned to Dermet SA de CV
  • Process for producing stable cupric hydroxide and basic cupric salts
    Patent number: 6596246
    Abstract: Stable copper hydroxide is prepared by removing ferrous ion from the beginning cupric solution. The ferrous ion is oxidized to ferric ion, and the ferric ion is precipitated by raising the pH of the solution to 3-4. The utilization of phosphate ion both increases the efficiency of oxidation and simultaneously precipitates ferric ion. A second raising the pH of the purified solution precipitates highly pure copper hydroxide that can be harvested.
    Type: Grant
    Filed: March 20, 2001
    Date of Patent: July 22, 2003
    Assignee: Dermet SA de CV
    Inventors: Julio Huato, Tetsuya Ogura