Conductive aluminum lithium ion adsorption column material and preparation method thereof

Abstract

The invention discloses a conductive aluminum lithium ion adsorption column material and a preparation method thereof. The preparation method comprises the steps that a dispersing agent and an organicsolvent are mixed to be uniform, and first mixed liquid is formed; aluminum hydroxide, lithium hydroxide and a cross-linking agent are mixed to be uniform, and second mixed liquid is formed; after the first mixed liquid and the second mixed liquid are mixed, heating is carried out, polymer monomers and an initiator are added to react, finally conductive organic matter monomers and a solid conductive material are added to be subjected to a polymerization reaction, and the conductive aluminum lithium ion adsorption column material is obtained. According to the conductive aluminum lithium ion adsorption column material and the preparation method thereof, the lithium hydroxide is inserted into the layered compound aluminum hydroxide, and is combined with acidic or basic groups of the polymermonomers, carboxy groups on the surface of an obtained polymer and aniline are subjected to secondary crosslinking, and a conductive polyaniline surface coating is prepared; meanwhile, the surface ofthe polymer is bonded with inorganic conductive powder during secondary crosslinking, and the obtained lithium ion adsorption column material is good in mechanical strength, high in selectivity, largein capacity and good in stability and electrical conductivity.

Description

technical field [0001] The invention relates to a lithium ion adsorption column material, in particular to a conductive aluminum-based lithium ion adsorption column material and a preparation method thereof, belonging to the technical field of preparation of lithium ion adsorption. Background technique [0002] At present, in terms of lithium extraction technology, whether it is ore lithium extraction or salt lake lithium extraction in China, it is classified into five aspects: electrodialysis, extraction, precipitation, calcination, and adsorption. These five processes are in lithium resources. There are applications in the development. For different salt lakes, the selection process and preparation methods are different, and all of them have a certain usable range. Since the first four processes are suitable for the extraction of high-concentration lithium resources in the old brine of salt lakes, the actual loss is relatively large in the process of converting the origin...

AI Technical Summary

Problems solved by technology

These methods have a specific scope of use, but are also subject to certain restrictions during their use

For example, if the particles prepared by the organic dissolution method need to be spherical, an excessive amount of organic polymer is required to make the compound into colloidal particles, which reduces the adsorption effect of the adsorbent.

The second method of hot melting is not suitable for inorganic compounds prepared at low temperature, especially those with crystalline hydrates or inorganic compounds that are easily decomposed at high temperature

The third method is not suitable for alkaline or acid-base-sensitive compounds, and the adsorption performance will be easily damaged in the later hydrophilic modification process.

[0006] In the prior art, the publication number is CN 101955210 A, and in the patent named granular lithium ion sieve, an inert gas is used as a protective gas to protect the reaction process. At the same time, the precursor is not treated with hydrophilicity. The prepared particles are in the shape of rods, which can be adsorbed but cannot be used as an adsorption column material. At the same time, the final product prepared is not cross-linked and solidified, so that the product will shrink and deform to a certain extent after drying.

The patent with the publication number CN 106084102 A uses the reaction of styrene and compounds in the oil phase to prepare adsorbent particles. This method has a limited load capacity and the prepared particles are hydrophobic particles, which are more suitable for oily pollutants. Adsorption removal, not conducive to adsorption treatment in aqueous solution

[0007] There are two main disadvantages of the direct use of adsorbents: (1) The conventional lithium adsorbents are in powder form, which is difficult to promote in actual use.

(2) The ion exchange rate of the adsorbent itself is relatively slow, which causes a lot of waste to the eluent

After the prepared adsorbent is cleaned and dried, the adsorbent column material is compounded through the polymerization of organic monomers, and the procedure is complicated.

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