Patents by Inventor Delphine Tigreat

Delphine Tigreat 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 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