Commissariat &#xc0; L'&#xc9;nergie Atomique Et Aux &#xc9;nergies Alternatives

Centre National De La Recherche Scientifique

Commissariat a L'energie Atomique

Universitè De Montpellier

Orano Cycle

Ceramiques Techniques Et Industrielles (cti)

Universite De Montpeller II

Centre National De La Recherche Scientifique-cnrs

Areva Nc

Université Montpellier 2 Sciences Et Techniques

Orano Recyclage

Ceramiques Techniques Industrielles Cti

Université Montpellier II

Université De Montpellier 2

Agnès Grandjean

Stéphane Pellet-Rostaing

Roger Boen

Yves Barre

Frédéric Goettmann

Guilhem Arrachart

Fabien Frances

Yannick Guari

Joulia Larionova

Frédéric Cuer

Olivier Pinet

Alban Gossard

Alain Ledoux

Lionel Montagne

Sophie Schuller

Gilles Leturcq

Daniel Coillot

Hélène Nonnet

Olivier Conocar

Raphaël Turgis

Nicolas Bousquet

Daniel Meyer

Eric Louradour

Célia Lepeytre

Christophe Baron

Jérôme Long

Thierry Blisson

Virginie Fremy

Alexandre Charlot

Thierry Advocat

Jean-Luc Dussossoy

Charlène Vallat

Jeremy Causse

Alexei Tokarev

Christian Guerin

Camille Carrignon

Virginie Labe

Didier Dhaler

Sabah El Mourabit

Bernhard Smutek

Jérôme Lacquement

Bruno Penelon

Alexey Tokarev

Johann Ravaux

Hubert Alexandre Turc

Jérémy Causse

Pierre Venditti

Carole Delchet

Marie Guillot

Solid nanocomposite material comprising nanoparticles of a hexacyanometallate or octacyanometallate of an alkali metal and of a transition metal, of formula [Alk]M[M'(CN)]in which Alk is an alkali metal, x is 1 or 2, M is a transition metal, n is 2 or 3, M&#x2032; is a transition metal, m is 6 or 8, z is 3 or 4, attached to at least one surface of a porous inorganic solid support, in which the nanoparticles are attached by adsorption to the at least one surface of the solid support, and in which the surface is a basic surface. Method for preparing this material. Method for extracting at least one metal cation from a liquid medium containing it, wherein the liquid medium is brought into contact with the material.

Solid nanocomposite material based on hexa- or octacyanometallates of alkali metals, method for preparing same, and method for extracting metal cations

A material in the form of an alveolar monolith consisting of a matrix of an inorganic oxide with a hierarchical and opened porosity comprising macropores, mesopores and micropores, said macropores, mesopores and micropores being interconnected, and nanoparticles of at least one metal cation exchange inorganic solid material being distributed in said porosity. A method for preparing this material and a method for separating a metal cation notably a cation of a radioactive isotope of a metal such as cesium using this material.

Inorganic cellular monobloc cation-exchange materials, the preparation method thereof, and separation method using same

The invention relates to a method for producing a solid nanocomposite material comprising nanoparticles of a metal coordination polymer with ligands CN, said nanoparticles satisfying the formula [Alk]M[M'(CN)]where Alk is an alkali metal, x is 1 or 2, M is a transition metal, n is 2 or 3, M&#x2032; is a transition metal, m is 6 or 8, and z is 3 or 4; said Mcations of the coordination polymer being bound by an organometallic bond or a coordination bond to an organic group R2 of an organic graft, and said organic graft furthermore being chemically attached, preferably by a covalent bond, to at least one surface of a solid support, by reaction of a group R1 of said graft with said surface.

Method for producing a solid nanocomposite material based on hexa- and octa-cyanometallates of alkali metals

The invention relates to an organic-inorganic hybrid material which comprises an inorganic solid support on which are grafted organic molecules of the general formula (I) hereafter: and relates to methods allowing preparation of this hybrid material as well as to the uses of the hybrid material for extracting uranium(VI) from an aqueous medium comprising phosphoric acid.

Organic-inorganic hybrid material of use for extracting uranium (VI) from aqueous media containing phosphoric acid, processes for preparing same and uses thereof

A supported membrane is provided comprising an inorganic, solid porous filtration membrane supported by an inorganic, solid porous support, said supported membrane comprising nanoparticles of a metal coordination polymer with CN ligands comprising Mcations, where M is a transition metal and n is 2 or 3; and Alk[M'(CN)]anions where Alk is an alkaline metal, y is 0, 1 or 2, M&#x2032; is a transition metal, x is 3 or 4, and m is 6 or 8; said Mcations of the coordination polymer being bound through an organometallic or coordination bond to an organic group of an organic graft chemically attached to the surface of the filtration membrane, inside the pores of the filtration membrane, and optionally inside the pores of the support. The supported membrane may be used in a process for separating at least one metal cation and solid particles from a liquid medium containing the same.

Supported membrane functionalized with hexa- and octacyanometallates, process for the preparation thereof and separation process using same

The invention relates to the use of an organic-inorganic hybrid material, comprising an inorganic solid support on which are grafted organic molecules having the general formula (I) below: in which: The invention also relates to a method that makes it possible to recover the uranium(VI) present in a sulfuric acid aqueous solution, selectively with respect to the other metal cations that may also be present in said solution.

Use of an organic-inorganic hybrid material for extracting uranium(VI) from a sulfuric acid aqueous solution, issued notably from the sulfuric leaching of a uranium-bearing ore

A method for treating before calcination a nitric aqueous solution comprising at least one radionuclide and ruthenium is provided. The method comprises a step for adding to the solution a compound selected from lignins, lignocelluloses, optionally as salts and mixtures thereof.

Method for the pre-calcining treatment of an aqueous nitric solution comprising at least one radionuclide and optionally ruthenium

A nanocomposite solid material includes nanoparticles of a metal coordination polymer with CN ligands comprising Mcations, in which M is a transition metal and n is 2 or 3; and anions [M'(CN)]in which M&#x2032; is a transition metal, x is 3 or 4, and m is 6 or 8. The Mcations of the coordination polymer are bound through an organometallic bond to an organic group of an organic graft chemically attached inside the pores of a support made of porous glass. The material can be used in a method for fixing (binding) a mineral pollutant, such as radioactive cesium, contained in a solution by bringing the solution in contact with the nanocomposite solid material.

Nanocomposite solid material based on hexa- and octa-cyanometallates, method for the preparation thereof and method for fixing mineral pollutants using said material

A glass composition, characterized in that it is selected from the group consisting of: a glass composition (A) with the following molar percentages: 70 to 76% of SiO, 7 to 8% of BO, 5 to 6% of AlO, and 10 to 17% of NaO; and a glass composition (B) with the following molar percentages: 63 to 76% of SiO, 5 to 12% of ZrO, 0 to 12% of BO, 0 to 2% of LaO, 11 to 14% of NaO, and 3 to 5% of KO. The glass composition can be used in a method for assembling parts, in particular for a method of manufacturing high-temperature electrolyzers (HTEs) or high-temperature fuel cells (SOFCs).

Glass compositions for gaskets of apparatuses operating at high temperatures and assembling method using them

The invention relates to a process for recovering at least one platinoid element contained in an acidic aqueous solution comprising chemical elements other than the platinoid element, the process comprising the steps of (a) bringing the acidic aqueous solution into contact with a reducing amount of a reducing agent which is a non-sulphurous and non-glucidic alcoholic compound chosen from cyclic, optionally aromatic, alcohols and aliphatic polyols, which reduces the platinoid element to its 0 oxidation state; and (b) separating the reduced platinoid element from the acidic aqueous solution.

Process for separating at least one platinoid element from an acidic aqueous solution comprising, besides this platinoid element, one or more other chemical elements

The present invention relates to a process for the manufacture of a glass frit for the containment by vitrification of a material comprising at least one oxidizable or reducible chemical species, and also to a process for the containment of said material by vitrification. The process for the manufacture of the glass frit comprises a step of incorporating into a raw glass frit at least one redox couple, the nature and the amount of which make it possible to maintain said at least one chemical species in its oxidized or reduced state. The containment process comprises mixing and hot melting the resulting glass frit and the material to be contained. The present invention makes it possible to optimize the containment of pollutants such as radionucleides, metals and metalloids. The material may be nuclear waste or a material derived from the incineration of household refuse.

Method for confining a substance by vitrification

The present invention relates to the use of a mixed carbonate of formula AB(CO), in which A and B are different and chosen from alkali metals, alkaline-earth metals and rare earths, for the containment of radioactive carbon. This use may for example involve a process comprising: mixing COhaving a radioactive carbon to be contained, or a simple carbonate of an alkali, alkaline-earth or rare-earth metal having a radioactive carbon to be contained, with an aqueous solution of a mixture of ACland BClor with an aqueous solution of a mixture of A(OH), and B(OH)in order to obtain a precipitate of AB(CO), where n and m are integers sufficient to compensate for the charge of A and B respectively; recovery of the AB(CO)precipitate in powder form; and then pressing and sintering of the powder at a 20 temperature below the decarbonation temperature of the mixed carbonate manufactured in order to obtain sintered pellets of mixed carbonates for the containment of the radioactive carbon.

Use of sintered mixed carbonates for the confinement of radioactive carbon

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Saint Marcel de Careiret, France

Agnès Grandjean