Process of extraction of lithium from a material comprising lithium and at least another metal
AssigneesUniversite De Rouen Normandie, Institut National Des Sciences Appliquees De Rouen, Centre National De La Recherche Scientifique, Ecole Nationale Superieure D'Ingenieurs De Caen, Universite De Caen Normandie
InventorsFiras Ayadi, Virginie Nachbaur, Valérie Pralong
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Abstract
Lithium is extracted from a material comprising lithium and at least another metal, such as a transition or post-transition metal, by a process using a polyol solvent and a carbonate and a solvothermal treatment. A liquid containing lithium carbonate can be separated. Solid lithium carbonate can be isolated from the liquid containing lithium carbonate.
Claims17
A process of extraction of lithium from a material comprising lithium and at least another metal, said process comprising the following steps:
- a) contacting said material with a polyol solvent and at least one metal carbonate to obtain a reaction mixture;
- b) performing a solvothermal treatment of the reaction mixture obtained in step a) to obtain a solvothermally treated composition SP1;
- c) separating a liquid L1 containing lithium carbonate and a solid S1 forming the solvothermally treated composition SP1 obtained in step b);
- and
- d) optionally, isolating solid lithium carbonate from the liquid L1.
A process of extraction of lithium from a material comprising lithium and at least another metal, said process comprising the following steps:
- a) contacting said material with a polyol solvent and a carbonate to obtain a reaction mixture;
- b) performing a solvothermal treatment of the reaction mixture obtained in step a) to obtain a solvothermally treated composition SP1;
- c) separating a liquid L1 containing lithium carbonate and a solid S1 forming the solvothermally treated composition SP1 obtained in step b);
- d) optionally, isolating solid lithium carbonate from the liquid L1;
- e) washing the solid S1 with a solvent in which lithium carbonate is not soluble;
- f) contacting the solid S1 with water to obtain a composition SP2;
- g) separating a liquid L2 containing lithium carbonate and a solid S2 forming the composition SP2 obtained in step f);
- and
- h) optionally, isolating solid lithium carbonate from the liquid L2.
Dependencies are inferred from the claim text.