Lithium adsorbent and preparation method thereof
A technology of lithium adsorption and adsorbent, which is applied in the field of preparing the lithium adsorbent, can solve problems such as the easy detachment of the adsorbent, the rupture of the spherical adsorbent, and the reduction of the service life, so as to achieve long service life, improved capacity and adsorption efficiency, and durability The effect of solution flushing
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[0049] According to the method for preparing a lithium adsorbent according to an embodiment of the present invention, the method effectively solves the problem of relying on a large amount of binder and adsorbent in the forming process of the existing granular or block adsorbent by forming the adsorbent on the base film. The dosage ratio is low, the adsorption capacity is poor, and it is easy to fall off and break. The lithium adsorption body prepared by this method has high strength, is more resistant to solution erosion, is not easy to be damaged, and has a fast solution permeability, and the adsorption capacity and adsorption efficiency are also significantly improved. At the same time, the service life is also longer. All the technical features and advantages of the body will not be repeated here.
[0050] In order to facilitate the understanding of the method for preparing lithium adsorbents, refer to image 3 , according to an embodiment of the present invention, the me...
Embodiment 1
[0072] The lithium adsorption body was prepared by using the method of the embodiment of the present invention and the adsorption amount was detected.
[0073] 1. Preparation method:
[0074] (1) Weigh 100g of polyvinylidene fluoride (PVDF) and add it to 400g of N-methylpyrrolidone (NMP) to dissolve, then add powdered aluminum salt adsorbent (mLiCl 2Al(OH) 3 ·nH 2 (0) 400g, high-speed stirring and mixing at room temperature for 6h to obtain a uniformly mixed slurry.
[0075] (2) Coating the prepared slurry onto the surface of the PES film by a slide coating technique to form an intermediate of the adsorbent layer.
[0076] (3) The film coated with the adsorbent layer was rinsed with water and then heated to 100° C. for drying to prepare a composite film with an adsorbent coating thickness of 1 mm.
[0077] (4) Cut the composite film into a suitable size to obtain a lithium adsorbent product with a substrate.
[0078] 2. Detection of adsorption amount
[0079] (1) The lith...
Embodiment 2
[0086] Using the method of the embodiment of the present invention to prepare the lithium adsorbent and detect the adsorption amount, the preparation method of this embodiment is the same as that of Example 1, but a pore-forming agent is added to the raw material, and the specific steps are as follows:
[0087](1) Weigh 100g of polyvinylidene fluoride (PVDF) and add it to 400g of N-methylpyrrolidone (NMP) to dissolve, then add powdered aluminum salt adsorbent (mLiCl 2Al(OH) 3 ·nH 2 (0) 400g, and 0.5g ammonium bicarbonate, stirred and mixed at a high speed at room temperature for 6h to obtain a uniformly mixed slurry.
[0088] (2) Coating the prepared slurry onto the surface of the PES film by a slide coating technique to form an intermediate of the adsorbent layer.
[0089] (3) The film coated with the adsorbent layer was rinsed with water and then heated to 100° C. for drying to prepare a composite film with an adsorbent coating thickness of 1 mm.
[0090] (4) Cut the compo...
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Abstract
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