Patents by Inventor Laurence Delons

Laurence Delons 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 for the separation and purification of hafnium and zirconium
    Patent number: 7708962
    Abstract: A process for the separation and purification of hafnium and zirconium.
    Type: Grant
    Filed: July 7, 2005
    Date of Patent: May 4, 2010
    Assignee: Compagnie Europeenne du Zirconium-Cezus
    Inventors: Laurence Delons, Stéphane Lagarde, Alain Favre-Reguillon, Stéphane Pellet-Rostaing, Marc Lemaire, Ludovic Poriel
  • Method for separating zirconium and hafnium
    Publication number: 20090185965
    Abstract: A method for separating zirconium and hafnium from a mixture of ZrCl4 and HfCl4 containing 3 wt. % or less of Hf based on Zr+Hf, the method includes the following steps: 1) hydrolyzing a mixture of ZrCl4 and HfCl4 in an aqueous solution of strong inorganic acid, so as to form an aqueous solution having 7 to 12 moles of acid per liter; 2) passing the solution obtained at step 1) in an anion exchanging resin; 3) optionally eluting a fraction of said aqueous solution having 7 to 12 moles of acid per liter, enriched in hafnium; 4) removing the resin of the acid solution containing Zr and Hf; 5) passing in the resin an aqueous solution to detach the zirconium compounds fixed to the resin, and recovering a zirconium-enriched fraction.
    Type: Application
    Filed: October 7, 2005
    Publication date: July 23, 2009
    Inventors: Laurence Delons, Stéphane Lagarde, Ludovic Poriel, Marc Lemaire, Alain Favre-Reguillon, Stéphane Pellet-Rostaing
  • Process for the Separation and Purification of Hafnium and Zirconium
    Publication number: 20090117018
    Abstract: A process for the separation and purification of hafnium and zirconium.
    Type: Application
    Filed: July 7, 2005
    Publication date: May 7, 2009
    Inventors: Laurence Delons, Stephane Lagarde, Alain Favre-Reguillon, Stephane Pellet-Rostaing, Marc Lemaire, Ludovic Poriel
  • Process for the Separaton of Hafnium and Zirconium
    Publication number: 20080031791
    Abstract: A process for the separation and purification of hafnium and zirconium.
    Type: Application
    Filed: July 7, 2005
    Publication date: February 7, 2008
    Inventors: Laurence Delons, Stephane Lagarde, Alain Favre-Reguillon, Stephane Pellet-Rostaing, Marc Lemaire, Ludovic Poriel
  • Method for separating zirconium and hafnium tetrachlorides with the aid of a melted solvent
    Patent number: 6929786
    Abstract: A method of separating zirconium and hafnium tetrachlorides using a solvent comprising firstly an alkaline metallic solvent comprising a salt made up of an alkali metal chloride and an acidic metal chloride A, for example a chloroaluminate or an alkaline chloroferrate, and secondly an acidic metal or metalloid chloride B of acidity that is less than that of the acidic metal chloride A. The acidic metal or metalloid chloride B may be selected from chlorides of Mg, Zn, and Cu. The method may be a continuous separation method by selective absorption of the tetrachloride vapors by the solvent in the substantially or totally molten state.
    Type: Grant
    Filed: April 12, 2002
    Date of Patent: August 16, 2005
    Assignee: Compagnie Europeenne du Zirconium CEZUS
    Inventors: Laurence Delons, Gérard Picard, Delphine Tigreat
  • Method for separating zirconium and hafnium tetrachlorides with the aid of a melted solvent
    Publication number: 20030165419
    Abstract: The invention relates to a method of separating zirconium and hafnium tetrachlorides using a solvent comprising firstly an alkaline metallic solvent comprising a salt made up of an alkali metal chloride and an acidic metal chloride A, for example a chloroaluminate or an alkaline chloroferrate, and secondly an acidic metal or metalloid chloride B of acidity that is less than that of the acidic metal chloride A. The acidic metal or metalloid chloride B is preferably selected from chlorides of Mg, Zn, and Cu. The method may be a continuous separation method by selective absorption of the tetrachloride vapors by the solvent in the substantially or totally molten state.
    Type: Application
    Filed: April 25, 2003
    Publication date: September 4, 2003
    Inventors: Laurence Delons, Gerard Picard, Delphine Tigreat