Lithium adsorbent, preparation method and application thereof as well as method for extracting lithium from salt lake brine
A technology of salt lake brine and lithium adsorption
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[0041] The preparation method of the lithium adsorbent according to the present invention includes step (2): the slurry B is heated and reacted with microwaves in the presence of ultrasonic waves to obtain the slurry C.
[0042] In step (2), the slurry B can be placed in an ultrasonic microwave reactor, and the heating reaction can be carried out through the heating action of microwaves.
[0043] The heating reaction can be carried out at a temperature of 40-100°C, for example, at 40°C, 41°C, 42°C, 43°C, 44°C, 45°C, 46°C, 47°C, 48°C, 49°C, 50°C , 51°C, 52°C, 53°C, 54°C, 55°C, 56°C, 57°C, 58°C, 59°C, 60°C, 61°C, 62°C, 63°C, 64°C, 65°C, 66°C, 67°C ℃, 68℃, 69℃, 70℃, 71℃, 72℃, 73℃, 74℃, 75℃, 76℃, 77℃, 78℃, 79℃, 80℃, 81℃, 82℃, 83℃, 84°C, 85°C, 86°C, 87°C, 88°C, 89°C, 90°C, 91°C, 92°C, 93°C, 94°C, 95°C, 96°C, 97°C, 98°C, 99°C, or 100°C at a temperature of °C. The temperature of the heating reaction can be adjusted by adjusting the power of the microwave.
[0044] The frequency o...
Embodiment 1
[0071] 78.02g of anhydrous Al(OH) 3 After mixing with 46.75g of anhydrous LiCl, add 372g of deionized water, stir and mix to form slurry A. The slurry A was continuously ground in a sand mill for 3 hours to obtain a slurry B, and the D50 of the solid particles in the slurry B was 1.58 μm.
[0072] The slurry B obtained by grinding was put into a constant temperature ultrasonic microwave reactor, the temperature was raised to 60° C., the ultrasonic frequency was controlled to 25 kHz, and the reaction was carried out for 9 hours to obtain slurry C.
[0073] The slurry C obtained by the reaction was spray-dried to obtain the lithium adsorbent according to the present invention, wherein the inlet temperature of the spray dryer was 280°C, and the outlet temperature was 95°C.
[0074] The lithium adsorbent was subjected to X-ray diffraction analysis, and the results were in figure 1 shown in . Such as figure 1 As shown, the XRD spectrum of the lithium adsorbent is consistent wit...
Embodiment 2
[0078] 156.84g of anhydrous Al(OH) 3 After mixing with 99.35g of anhydrous LiCl, add 800g of deionized water, stir and mix to form slurry A. The slurry A was continuously ground in a sand mill for 3 hours to obtain a slurry B, and the D50 of the solid particles in the slurry B was 1.97 μm.
[0079] The slurry B obtained by grinding was put into a constant-temperature ultrasonic microwave reactor, the temperature was raised to 75° C., the ultrasonic frequency was controlled to 22 kHz, and the reaction was carried out for 10 h to obtain slurry C.
[0080] The slurry C obtained by the reaction was spray-dried to obtain the lithium adsorbent according to the present invention, wherein the inlet temperature of the spray drier was 300°C, and the outlet temperature was 90°C.
[0081] Carry out X-ray diffraction analysis to this lithium adsorbent, the XRD spectrogram of this lithium adsorbent and LiCl 2Al(OH) 3 ·nH 2 XRD spectrum of O(1≤n≤3) Figure 1 , indicating that the lithium...
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