| 摘要 |
The invention concerns a method of preparing a crystallized solid material having the formula LiNO3.2Al(OH)3,n H2O, where n is between 0.01 and 10, the method comprising at least the following steps: (a) precipitating, in an aqueous medium, aluminium nitrate, sodium aluminate and at least one lithium source in order to obtain a suspension; (b) filtering the suspension obtained in step (a) in order to obtain a paste, the filtering step not being followed by a step in which the resulting paste is washed; (c) drying the paste obtained at the end of step (b); (d) shaping by extrusion the dried paste in order to obtain extruded products; and (e) drying the resulting extruded products at a temperature of between 20 and 200°C for a period of between 1 and 20 hours in order to obtain the crystallized solid material in the form of extruded products. The invention also concerns a method of extracting lithium from saline solutions using the material thus obtained. The invention further concerns a solid crystallized material having the formula LiNO3.2Al(OH)3,nH2O, n being between 0.01 and 10, shaped. The invention also concerns a device for performing the lithium-extraction method. |
