Patents by Inventor Werner Gottfried

Werner Gottfried has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for the preparation of basic copper carbonate
    Patent number: 4659555
    Abstract: The invention relates to a process for the preparation of basic copper carbonate by reacting copper salts with alkali carbonate in aqueous solution at elevated temperatures and with stirring and subsequently isolating the copper carbonate. In this process, a waste solution from copper etching processes which contains hydrochloric acid and sodium chloride, is stirred into a 5 to 15 weight percent solution of alkali carbonate heated to 40.degree. to 70.degree. C., the pH of the solution not being allowed to fall below 6.5, and the precipitated basic copper carbonate is separated from the aqueous solution in a known manner. A light green, basic copper carbonate is obtained, which is free of copper chloride and copper oxide.
    Type: Grant
    Filed: April 26, 1985
    Date of Patent: April 21, 1987
    Assignee: Th. Goldschmidt AG 03
    Inventors: Werner Gottfried, Ernst Mack, Lothar Witzke
  • Liquid-liquid extraction of nickel
    Patent number: 4162296
    Abstract: A method for extracting nickel from aqueous solutions thereof which contain large amounts of alkali metal ions by contacting the aqueous solution with an extraction agent comprising an organic solution of di-2-ethylhexyl phosphoric acid and naphthenic acid.
    Type: Grant
    Filed: January 25, 1978
    Date of Patent: July 24, 1979
    Assignee: Th. Goldschmidt AG
    Inventors: Wolfgang Muller, Lothar Witzke, Werner Gottfried