Patents by Inventor Friedrich W. Merz

Friedrich W. Merz 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).

  • Cost effective process for detoxification of cyanide-containing effluents
    Patent number: 5178775
    Abstract: This invention pertains to a method of treating cyanide contained in wastewater with particularly high levels of solids in the stream. The process involves either simultaneous or step-wise dosage of hydrogen peroxide in the form of an aqueous solution of a concentration between 35% to 90% by weight, preferably at least 50% by weight, and SO.sub.2 either in the form of gaseous SO.sub.2 or solution of sodium and/or potassium sulfite or metabisulfite resulting in the conversion of cyanide ions to non-toxic cyanate ions.
    Type: Grant
    Filed: December 17, 1990
    Date of Patent: January 12, 1993
    Assignee: Degussa AG
    Inventors: M. Q. Ahsan, Stephen Gos, Helmut Knorre, Roy Norcross, Friedrich W. Merz
  • Process for the treatment of effluents containing cyanide and other oxidizable substances
    Patent number: 4915849
    Abstract: Treatment of effluent containing cayanide is disclosed wherein a mixture of H.sub.2 SO.sub.4 and H.sub.2 O.sub.2 with between 0.01 and 0.5 moles of H.sub.2 SO.sub.4 per mole of H.sub.2 O.sub.2 is used.
    Type: Grant
    Filed: August 17, 1988
    Date of Patent: April 10, 1990
    Assignee: Degussa Aktiegesellschaft
    Inventors: Andrew Griffiths, M. Quamrul Ahsan, Roy Norcross, Helmut Knorre, Friedrich W. Merz
  • Process for the treatment of effluent containing cyanide and toxic metals, using hydrogen peroxide and trimercaptotriazine
    Patent number: 4822496
    Abstract: A process for the treatment of aqueous effluent containing cyanide and toxic or heavy metals, wherein the effluent is contacted with a sufficient amount of hydrogen peroxide to oxidize at least a substantial portion of the cyanide in the effluent in the presence of sufficient trimercaptotriazine to react with a substantial portion of the metal present in said effluent, and precipitating said metal component.
    Type: Grant
    Filed: August 18, 1988
    Date of Patent: April 18, 1989
    Assignee: Degussa Aktiengesellschaft
    Inventors: Andrew Griffiths, Roy Norcross, Gerhard Scherer, Friedrich W. Merz, Stephen Gos