Patents by Inventor M. Q. Ahsan

M. Q. Ahsan 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