Centre National De La Recherche Scientifique

Université De Rouen Normandie

Institut National Des Sciences Appliquees De Rouen Normandie

Jean-Marie Le Breton

Cyril Aymonier

Nicolas Maât

Nicolas Maat

Virginie Nachbaur

Disclosed is a method and a device for retrieving, from an object A, elements G present in a matrix M, the method including at least the following steps: bringing said abject A into contact with a dense fluid Fd with a molar mass greater than 2 g molunder temperature Tand pressure Pconditions suitable for transforming the intergranular phase and for releasing the elements G, modifying the temperature Tand/or pressure Pvalues to stop the reaction transforming the intergranular phase, and recovering the elements G separated front the matrix M.

Method and system for recovering magnetic grains from sintered magnets or plastic magnets

Disclosed is a method and system for recovering at least rare earth elements from within an object A consisting of at least one first rare earth portion or a mixture of rare earth elements and a second metal portion. The method includes a solvothermal treatment step that places the object in contact with a fluid for causing at least one rare earth portion and/or mixture of rare earth elements and the metal portion to oxidize in order to separate same, the value of the reaction temperature Tr is selected according to the nature of the object, the reaction following a R-M&#x2192;R(X)x+M(X)y scheme, where R is the rare earth element or a mixture of rare earth elements, M is the transition metal, and (X) is a group which depends on the fluid used.

Method and system for recovering rare earth elements from within an object

Growing community of inventors

Saint Pierre de Manneville, France

Jean-Marie Le Breton