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Microcrystalline property aluminum salt lithium ion adsorbent particles coated with macro-porous silica gel and loaded with lightweight glass material and preparation method thereof

An adsorbent and microcrystallization technology, applied in chemical instruments and methods, other chemical processes, silicon compounds, etc., can solve the problems of unreachable industrial application conditions, high dissolution rate, and difficulty in filtration and separation, and achieve the expansion of adsorbent quality , good adhesion, and the effect of expanding the surface area

Active Publication Date: 2018-05-18
西安海润新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The advantages of the aluminum salt lithium ion adsorption method are that the raw materials are cheap and easy to obtain, the environment is friendly, the selectivity to lithium ions is good, and the alkali metal and alkaline earth metal ions that coexist with lithium ions can be effectively separated. The disadvantage is that the aluminum lithium precipitate LiCl 2Al (OH) 3 ·nH 2 O is a colloid, and it is very difficult to filter and separate. When used as an adsorbent, the dissolution loss rate is relatively large, and it cannot meet the industrial application conditions. The development of aluminum salt lithium ion adsorbent is currently an active research and development direction.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Dissolve 102g (0.5mol) of aluminum isopropoxide in 50g of isopropanol, add dropwise to 500mL of 0.2mol / L hydrochloric acid aqueous solution under stirring, and hydrolyze to form white Al(OH) 3 Precipitate, peptize and hydrothermally react at 80-90°C for 16 hours, evaporate and concentrate to form a transparent hydrosol, and generate microcrystalline Al(OH) with a concentration of 10% by mass 3 Acidic hydrosol 390g.

[0029] Immerse 16g of light fly ash floating beads with a particle size of 100-150µm in the microcrystalline Al(OH) with a mass percentage concentration of 10%. 3 In acidic hydrosol 390g, under stirring, add the lithium acetate aqueous solution 82.5g (0.25mol) that mass percent concentration is 20%, evaporate hydrosol, form microcrystalline aluminum salt adsorbent precursor gel on fly ash floating beads 60g, its chemical composition is LiCl 2Al(OH) 3 ·3H 2 O.

[0030] Add 90g (5mol) of deionized water, 20.8g (0.1mol) of tetraethyl orthosilicate and 5mL ...

Embodiment 2

[0033] The cleaned diameter is 50-100 μ m hollow glass microspheres 16g immersed in the microcrystalline Al(OH) with a mass percentage concentration of 10% prepared according to the method of Example 1 3 In 390 g of acidic hydrosol, add 82.5 g (0.25 mol) of lithium acetate aqueous solution with a mass percent concentration of 20% under stirring, heat and evaporate the hydrosol on a water bath, and form a microcrystalline aluminum salt adsorbent precursor on hollow glass microspheres Body gel 60g, its chemical composition is LiCl 2Al(OH) 3 ·3H 2 O.

[0034] The microcrystalline aluminum salt adsorbent precursor 60g supported by hollow glass microspheres is impregnated into 30g of composite nano-SiO with a mass percentage concentration of 10% prepared according to the method in Example 1. 2 In the hydrosol, the solvent volatilizes to form a gel block; transfer it to an oven at 150-180°C to dry and solidify the gel for 2 hours, and crush the gel block to obtain a macroporous si...

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Abstract

The present invention relates to microcrystalline property aluminum salt lithium ion adsorbent particles coated with macro-porous silica gel and loaded with a lightweight glass material. The particlesize of the adsorbent particles is 0.5 to 2.0mm, the porosity is 20 to 30 percent, and the density is 400 to 800kg / m<3>. The microcrystalline aluminum salt lithium ion adsorbent particles are preparedfrom 55 to 65 percent by mass of aluminum salt, 5 to 10 percent by mass of macro-porous silica gel and the balance of lightweight glass material, and the adsorption capacity of the adsorbent particles is 6 to 8mg / g. The chemical composition of a microcrystalline aluminum salt lithium ion adsorbent is (1-x)LiCl.2Al(OH)3.nH2O, wherein x is equal to 0.5-1, and n is equal to 1-3. The macro-porous silica gel is formed by gelatinization of composite nanometer SiO2 hydrosol, and the pore size of the macro-porous silica gel is 10nm or more. The lightweight glass material is one of hollow glass microspheres with density less than 500kg / m<3>, fly ash float beads, glass fiber powder or foam glass powder. By adopting the adsorbent particles, the solution loss of an adsorbent can be reduced greatly, and the industrial application need is met.

Description

technical field [0001] The invention relates to a microcrystalline aluminum salt lithium ion adsorbent particle and a preparation method thereof, in particular to a microcrystalline aluminum salt lithium ion adsorbent particle loaded on a light glass material coated with macroporous silica gel and a preparation method thereof, belonging to field of new energy materials. technical background [0002] Lithium resources in nature are mainly stored in seawater, salt lake brine and geothermal water. With the increasing demand of lithium salt market, it is urgent to develop dilute lithium liquid resources. Lithium extraction methods from dilute solution mainly include precipitation method, solvent extraction method and adsorption method, etc. At present, the lithium extraction method of industrial salt lake brine in foreign countries is mainly precipitation method, while Mg / Li in most salt lake brines in my country is very high, Li content Low, not suitable for lithium extraction ...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/08B01J20/04B01J20/28B01J20/30
CPCB01J20/046B01J20/08B01J20/103B01J20/28016
Inventor 李建生王少杰李仕增刘炳光赵洋王泽江刘红玉尹浩南
Owner 西安海润新材料有限公司
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