Patents by Inventor Isabelle Bisel

Isabelle Bisel 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 purifying the uranium from a natural uranium concentrate
    Patent number: 8795611
    Abstract: A method with which uranium from a natural uranium concentrate may be purified, including a) extracting the uranium present as uranyl nitrate in an aqueous phase A1 resulting from the dissolution of the natural uranium concentrate in nitric acid, by means of an organic phase which contains an extractant in an organic diluent; b) washing the organic phase obtained at the end of step a), with an aqueous phase A2; and c) stripping the uranyl nitrate of the organic phase obtained at the end of step b), by circulating this organic phase in an apparatus, as a counter current against an aqueous phase A3. The extractant is an N,N-dialkylamide and the ratio between the flow rate at which the organic phase obtained at the end of step b) and the aqueous phase A3 circulate in the apparatus where step c) occurs, is greater than 1.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: August 5, 2014
    Assignees: Commissariat a l'Energie Atomique et aux Energies Alternatives, AREVA NC
    Inventors: Manuel Miguirditchian, Pascal Baron, Isabelle Bisel, Binh Dinh, Christian Sorel, Jean Bertin
  • METHOD FOR PURIFYING THE URANIUM FROM A NATURAL URANIUM CONCENTRATE
    Publication number: 20120247276
    Abstract: A method with which uranium from a natural uranium concentrate may be purified, including a) extracting the uranium present as uranyl nitrate in an aqueous phase A1 resulting from the dissolution of the natural uranium concentrate in nitric acid, by means of an organic phase which contains an extractant in an organic diluent; b) washing the organic phase obtained at the end of step a), with an aqueous phase A2; and c) stripping the uranyl nitrate of the organic phase obtained at the end of step b), by circulating this organic phase in an apparatus, as a counter current against an aqueous phase A3. The extractant is an N,N-dialkylamide and the ratio between the flow rate at which the organic phase obtained at the end of step b) and the aqueous phase A3 circulate in the apparatus where step c) occurs, is greater than 1.
    Type: Application
    Filed: December 20, 2010
    Publication date: October 4, 2012
    Inventors: Manuel Miguirditchian, Pascal Baron, Isabelle Bisel, Binh Dinh, Christian Sorel, Jean Bertin