Patents by Inventor Carl Urbani

Carl Urbani 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).

  • Chemical treatment to improve red mud separation and washing in the bayer process
    Patent number: 9199855
    Abstract: The invention provides methods and compositions for improving the rheology of red mud removed from Bayer Process liquor. The method includes adding a flocculant and a cross-linked polysaccharide to the liquor. This combination separates the red mud from the liquor but also prevents the red mud from becoming too thick. By preventing excessive thickness, the method allows for the formation of extremely dense amounts of red mud even in primary settlers because the dense red mud can still flow. As a result a user can simultaneously enjoy both easy handling of red mud and also high recovery rates of valuable alumina and caustic from the red mud.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: December 1, 2015
    Assignee: Nalco Company
    Inventors: Carl Urbani, John D Kildea, Ryan Chester, Jing Wang
  • CHEMICAL TREATMENT TO IMPROVE RED MUD SEPARATION AND WASHING IN THE BAYER PROCESS
    Publication number: 20130112627
    Abstract: The invention provides methods and compositions for improving the rheology of red mud removed from Bayer Process liquor. The method includes adding a flocculant and a cross-linked polysaccharide to the liquor. This combination separates the red mud from the liquor but also prevents the red mud from becoming too thick. By preventing excessive thickness, the method allows for the formation of extremely dense amounts of red mud even in primary settlers because the dense red mud can still flow. As a result a user can simultaneously enjoy both easy handling of red mud and also high recovery rates of valuable alumina and caustic from the red mud.
    Type: Application
    Filed: December 28, 2012
    Publication date: May 9, 2013
    Inventors: Carl Urbani, John D. Kildea, Ryan Chester, Jing Wang