摘要:
The invention concerns a method of preparing a crystallized solid material having the formula LiCl.2Al(OH) 3 ,nH 2 O, where n is between 0.01 and 10, the method comprising at least the following steps: (a) mixing, in an aqueous medium, at least one alumina source 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; (c) drying the paste obtained at the end of step (b) at a temperature of between 20 and 80°C for a period of between 1 and 12 hours; (d) shaping by extrusion of the dried paste, immediately after drying step (c) in order to obtain extruded products, shaping step (d) being performed in the absence of binder; 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 having the formula LiCl.2Al(OH) 3 ,nH 2 O in the form of extruded products. The invention also concerns a method of extracting lithium from saline solutions using the material thus prepared. The invention further concerns a solid crystallized material having the formula LiCl.2Al(OH) 3 ,nH 2 O, n being between 0.01 and 10, shaped. The invention also concerns a device for performing the lithium-extraction method.
摘要:
The invention relates to a process for preparing a crystalline solid material of formula LiCl.2Al(OH) 3 .nH 2 O with n being between 0.01 and 10, said process comprising at least the following steps: a) a step of mixing, in an aqueous medium, at least one source of alumina and at least one source of lithium in order to obtain a suspension, b) a step of filtering the suspension obtained in step a) in order to obtain a paste, c) a step of drying the paste obtained at the end of step b), d) a step of shaping said dried paste, directly after the drying step c) in order to obtain a shaped solid material, said shaping step d) being carried out in the absence of binder, and e) the drying of the shaped solid material obtained, f) a step of hydrothermal treatment in order to obtain the shaped crystalline solid material of formula LiCl.2Al(OH) 3 .nH 2 O. The invention also relates to a solid material obtained according to this process and to a process for extracting lithium from saline solutions using the material thus prepared.