| abstract |
The present invention relates to the field of solid materials for absorbing lithium. In particular, the present invention relates to a new process for the preparation of solid crystalline materials of the formula LiX x .2Al(OH) 3 .nH 2 O, preferably extruded, wherein n is between 0.01 and 10, when X is x is equal to 1 when an anion is selected from chloride, hydroxide and nitrate anions, and x is equal to 0.5 when X is an anion selected from sulfate and carbonate anions; the method comprises: at a specified temperature and pH conditions, the step a) of precipitating the boehmite; at least one shaping step, preferably by extrusion; the method also includes a final hydrothermal treatment step. When used to extract lithium from salt solutions, the method as a whole enables the resulting materials to have increased adsorption capacity for lithium as well as adsorption kinetics compared to materials obtained from the prior art. |