Centre National De La Recherche Scientifique

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

Universitè De Montpellier

Universite Claude Bernard – Lyon1

Areva Mines

Centre National De La Recherche Scientifique-cnrs

Antoine Leydier

Guilhem Arrachart

Veronique Dubois

Fanny Mary

Stéphane Pellet-Rostaing

Manuel Miguirditchian

Gilles Bernier

Anthony William Coleman

Fabien Burdet

Pierre G Falson

Raphael Turgis

Elisabeth Zekri

Raphaël Turgis

Frederic Huche

Véronique Dubois

Rachel Rima Matar Merheb

Gabriel Plancque

Nicolas Aychet

Stephane Pellet-Rostaing

Frédéric Huché

Rima Matar Merheb

Pierre Guy Falson

The invention relates to the use, as an extraction agent for extracting at least one rare earth from an aqueous phase including phosphoric acid, of at least one compound of the following general formula (I): where   The invention also relates to a method for recovering at least one rare earth using said compound, as well as to specific compounds as such.

Use of novel compounds for selectively extracting rare earths from aqueous solutions including phosphoric acid and associated extraction method

The invention relates to compounds which correspond to the general formula (I) below:  The invention also relates to the uses of these compounds as uranium(VI) ligands, in particular for extracting uranium(VI) from an aqueous solution of sulphuric acid, and also to a method that makes it possible to recover the uranium(VI) present in an aqueous solution of sulphuric acid resulting from the attack of a uranium ore by sulphuric acid and using said the compounds.

Compounds with phosphine oxide and amine functions, useful as uranium (VI) ligands, and uses thereof, in particular for extracting uranium(VI) from aqueous solutions of sulphuric acid

New compounds which meet general formula (I): where:

Bifunctional compounds useful as ligands of uranium (VI), methods of synthesising same and uses thereof

The present invention relates to the use and to a process involving at least one calix[n]arene derivative substituted by at least one acid functional group on the upper face and at least one aliphatic chain of variable length on the other face, as an additive for crystallization of a polar and/or positively charged molecule. The use and the process of the present invention have the advantage of enabling, facilitating and/or accelerating the crystallization of polar and/or positively charged molecules, especially of membrane proteins that are in solution or soluble, which had previously proved to be very difficult.

Additive for the crystallization of proteins, use and process

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Saint Etienne, France

Antoine Leydier