Patents by Inventor Francois Hyvrard

Francois Hyvrard 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 stabilizing metallic mercury
    Patent number: 10987531
    Abstract: Disclosed is a method for stabilizing metallic mercury in the form of mercury sulfide. The method includes the following steps: a) dispersing metallic mercury in a polysulfide aqueous solution so as to convert the metallic mercury into mercury sulfide; and b) separating the mercury sulfide.
    Type: Grant
    Filed: June 16, 2016
    Date of Patent: April 27, 2021
    Assignee: SARP INDUSTRIES
    Inventors: Francois Hyvrard, Julien Borrini, Dieter Offenthaler, Xavier Ibarz Formatger
  • METHOD FOR STABILIZING METALLIC MERCURY
    Publication number: 20180185685
    Abstract: Disclosed is a method for stabilizing metallic mercury in the form of mercury sulfide. The method includes the following steps: a) dispersing metallic mercury in a polysulfide aqueous solution so as to convert the metallic mercury into mercury sulfide; and b) separating the mercury sulfide.
    Type: Application
    Filed: June 16, 2016
    Publication date: July 5, 2018
    Inventors: Francois HYVRARD, Julien BORRINI, Dieter OFFENTHALER, Xavier IBARZ FORMATGER
  • Method for treating and upgrading effluents containing metallic sulphates using an ammonia addition step
    Patent number: 6861041
    Abstract: A method for treating and upgrading effluents containing at least a metallic sulphate comprising adding at least a base to the effluent to precipitate the metallic ions in the form of iron oxy-hydroxides Fe(OHx) wherein x=2 and/or 3; separating the precipitated hydroxide calcium sulphate CaSO4; and separating the calcium sulphate CaSO4 precipitated during the preceding step. Said method enables obtainment of calcium sulphate (white gypsum) substantially free of metals and therefore capable of being upgraded and iron oxy-hydroxides likewise capable of being upgraded.
    Type: Grant
    Filed: April 17, 2001
    Date of Patent: March 1, 2005
    Assignee: Sarp Industries
    Inventors: Francois Hyvrard, Pascal Muller
  • Method for treating and upgrading effluents containing metallic sulphates using an ammonia addition step
    Publication number: 20040089612
    Abstract: The invention concerns a method for treating and upgrading effluents containing at least a metallic sulphate, characterised in that it comprises steps which consist in: adding at least a base to the effluent to precipitate the metallic ions in the form of metallic hydroxides Mea(OH)e; separating the precipitated hydroxide calcium sulphate CaSO4; and separating the calcium sulphate CaSO4 precipitated during the preceding step. Said method enables to obtain calcium sulphate (white gypsum) substantially free of metals and therefore capable of being upgrade and metallic oxy-hydroxides likewise capable of being upgraded.
    Type: Application
    Filed: January 24, 2003
    Publication date: May 13, 2004
    Inventors: Francois Hyvrard, Pascal Muller