Patents by Inventor Dan Bergamini

Dan Bergamini 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).

  • Method for treating process streams containing cyanide and heavy metals
    Patent number: 5266203
    Abstract: An apparatus and method for treating streams containing cyanide, heavy metal and precious metal values to recover those values where the method includes the following steps:a) providing a membrane filtration means having an inlet, a product outlet and an discharge outlet,b) contacting the waste stream to be treated with an effective amount of carbon dioxide to adjust the pH to about 8.0 to about 10.0,c) further contacting the waste stream with an effective amount of a soluble metal compound to react with the cyanide in the waste stream to form membrane rejectable cyanide compounds, andd) passing the treated stream through the membrane filtration means to thereby separate recoverable cyanide and precious metal values from the treated stream and produce an effluent stream for further processing or discharge to the environment.
    Type: Grant
    Filed: January 30, 1992
    Date of Patent: November 30, 1993
    Assignee: Arrowhead Industrial Water, Inc.
    Inventors: Debasish Mukhopadhyay, Dan Bergamini