Patents by Inventor Pierre Doutreluingne

Pierre Doutreluingne 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).

  • Process and installation for the decontamination of radioactive nitric effluents containing strontium and sodium
    Patent number: 5702608
    Abstract: The invention relates to a process and an installation for the decontamination of radioactive nitric effluents containing strontium and sodium. According to this process, contacting takes place in 1 of the aqueous effluent with an organic phase incorporating a crown ether such as DCH18C6 and a diluent such as CHCl.sub.3, in order to selectively extract the strontium with respect to the sodium, followed by the reextraction of the strontium in an aqueous solution in 3, followed by fixing in 5 on a cation exchange resin. This leads to a high strontium decontamination level with a very high concentration factor.
    Type: Grant
    Filed: February 5, 1996
    Date of Patent: December 30, 1997
    Assignee: Compagnie Generales Des Matieres Nucleaires
    Inventors: Jacques Foos, Alain Guy, Marc Lemaire, Bruno Leclere, Gerard Le Buzit, Pierre Doutreluingne
  • Process for trapping gaseous ruthenium on polyvinyl pyridine, more particularly usable for recovering radioactive ruthenium from irradiated nuclear fuels
    Patent number: 5417942
    Abstract: The invention relates to a process fop trapping gaseous ruthenium on polyvinyl pyridine, more particularly usable for recovering radioactive ruthenium from irradiated nuclear fuels.This process consists of contacting a gas containing ruthenium in gaseous form with an adsorbent (11b) constituted by a vinyl pyridine polymer or copolymer for fixing the ruthenium to the latter. The gas can be constituted by yapours from a concentrate of fission products containing ruthenium, which has been heated (at 31) in the presence of an oxidizing agent for volatilizing the ruthenium.
    Type: Grant
    Filed: March 2, 1993
    Date of Patent: May 23, 1995
    Assignee: Compagnie Generale des Matieres Nucleaires
    Inventors: Jacques Foos, Marc Lemaire, Alain Guy, Micheline Draye, Rodolph Chomel, Andre Deloge, Pierre Doutreluingne