| abstract |
The present invention relates to the field of solid materials for the adsorption of lithium. In particular, the present invention relates to a new process for the preparation of a crystallized and shaped solid material, preferably in extruded form, of formula LiXx.2Al (OH) 3, nH2O with n being between 0 , 01 and 10, where x is 1 when X is an anion selected from chloride, hydroxide and nitrate anions, and x is 0.5 when X is an anion selected from sulfate and carbonate anions, comprising a step a ) precipitation of boehmite under specific temperature and pH conditions, a drying step in an oven, oven or by atomization so as to obtain a powder and at least one step of shaping said powder by basic extrusion, said method also comprising a final hydrothermal treatment step, all to increase the adsorption capacity of lithium and the adsorption kinetics of the materials obtained compared to the materials of the prior art when this it is used in a lithium extraction process of saline solutions. |