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Crystalline aluminium-salt lithium-ion adsorbent particles and preparation method thereof

An adsorbent and crystallization technology, applied in the field of new energy materials, can solve the problems of high dissolution rate of adsorbent, decrease of adsorption capacity, difficulty in filtration and separation, etc., and achieve the effects of environmental protection, low cost and simple and low process

Inactive Publication Date: 2018-06-22
TIANJIN VOCATIONAL INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage is that the amorphous aluminum-lithium precipitate is colloidal, with an average particle size of 1 μm, and the solid mass only accounts for about 10%. It is difficult to filter and separate, and the dissolution rate of the adsorbent is relatively large. As the number of adsorption and desorption cycles increases, the adsorption capacity decreases. , unable to reach industrial application conditions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Under stirring, add 20 mL of 2 mol / L ammonia water dropwise to 20 mL of 0.5 mol / L titanium sulfate aqueous solution to neutralize the solution until the pH is 8-9 to form Ti(OH) 4 Precipitation, vacuum filtration to separate the precipitate, and wash with deionized water; add the precipitate to 12 mL of 0.5 mol / L oxalic acid aqueous solution, and completely peptize at 70-80 ° C; add 4.2 g (0.02 mol) of ethyl orthosilicate after cooling , stirred until completely hydrolyzed, and concentrated to obtain 19.2 g of an inorganic ion exchanger hydrosol with a mass percent concentration of 10%. Immerse 10.5g (0.1mol) of activated alumina in 23.4g (0.11mol) of lithium chloride aqueous solution with a mass percent concentration of 20%, hydrothermally treat it at 90-100°C for 12h, and then dry it at 100-110°C. The chemical composition is obtained as LiCl 2Al(OH) 3 ·3H 2 O crystalline aluminum salt lithium ion adsorbent precursor 25.2 g (0.10 mol).

[0031] Immerse 25.2 g (0.10 ...

Embodiment 2

[0033] Under stirring, in 20 mL of 0.5 mol / L zirconium tetrachloride aqueous solution, add dropwise 20 mL of 2 mol / L ammonia water to neutralize the solution until the pH is 8-9, forming Zr(OH) 4 Precipitation, vacuum filtration to separate the precipitate, and wash with deionized water; add the precipitate to 10 mL of 0.5 mol / L oxalic acid aqueous solution, and completely peptize at 70-80 ° C; add 6.2 g (0.03 mol) of tetraethyl orthosilicate after cooling , stirred until completely hydrolyzed, and concentrated to obtain 29.1 g of an inorganic ion exchanger hydrosol with a mass percent concentration of 10%. Immerse 10.5g (0.1mol) of activated alumina in 23.4g (0.11mol) of lithium chloride aqueous solution with a mass percent concentration of 20%, hydrothermally treat it at 90-100°C for 12h, and then dry it at 100-110°C. The chemical composition is obtained as LiCl 2Al(OH) 3 ·3H 2 O crystalline aluminum salt lithium ion adsorbent precursor 25.2 g (0.10 mol).

[0034] Immerse...

Embodiment 3

[0036] Add 20 mL of 2 mol / L ammonia water dropwise to 20 mL of 0.5 mol / L tin tetrachloride aqueous solution under stirring to neutralize the solution until the pH is 8-9 to form Sn(OH) 4 Precipitation, vacuum filtration to separate the precipitate, and wash with deionized water; add the precipitate to 12 mL of 0.5 mol / L oxalic acid aqueous solution, and completely peptize at 70-80 ° C; add 6.2 g (0.03 mol) of ethyl orthosilicate after cooling , stirred until completely hydrolyzed, and concentrated to obtain 31.9 g of an inorganic ion exchanger hydrosol with a mass percent concentration of 10%. Immerse 10.5g (0.1mol) of activated alumina in 23.4g (0.11mol) of lithium chloride aqueous solution with a mass percent concentration of 20%, hydrothermally treat it at 90-100°C for 12h, and then dry it at 100-110°C. The chemical composition is obtained as LiCl 2Al(OH) 3 ·3H 2 O crystalline aluminum salt lithium ion adsorbent precursor 25.2 g (0.10 mol).

[0037] Immerse 25.2 g (0.10 ...

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Abstract

The invention relates to crystalline aluminium-salt lithium-ion adsorbent particles coated with an inorganic ion exchanger. Adsorption capacity of the adsorbent particles is 11-13 mg / g, and chemical composition of the adsorbent particles is (1-x)LiCl.2Al(OH)3.yMO2.nH2O, wherein MO2 is a mixture of SiO2 and one of TiO2, SnO2 and ZrO2, x=0.5-1, y=0.1-0.5, and n=0.5-1. The inorganic ion exchanger isa nano-oxide hydrosol film formed by TiO2, SnO2 or ZrO2 and SiO2 and serves as an anti-solution-loss coating agent, an ion exchanger and a particle formation binder of a crystalline aluminium-salt adsorbent. By adopting the inorganic ion exchanger to coat a crystalline aluminium-salt lithium-ion adsorbent, solution loss rate of the crystalline aluminium-salt lithium-ion adsorbent can be reduced, higher adsorption and desorption rates can be maintained, adsorbed lithium salts can be desorbed by a water solution, acid-base consumption is not needed, and environmental protection is facilitated.

Description

technical field [0001] The invention relates to a crystalline aluminum salt lithium ion adsorbent particle and a preparation method thereof, in particular to a crystalline aluminum salt lithium ion adsorbent particle coated with an inorganic ion exchanger and a preparation method thereof, belonging to the field of new energy materials. technical background [0002] Lithium is one of the new energy materials in the 21st century, and the market demand is increasing. At present, lithium extraction from industrialized salt lake brines in foreign countries is mainly based on the precipitation method, but in most salt lake brines in my country, Mg / Li is very high, and the Li content is low, which is not suitable for the precipitation method to extract lithium. The adsorption method is considered to be the most economical and practical method for extracting lithium from salt lake brine and seawater. The key to extracting lithium by the adsorption method is to prepare lithium ion ad...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/28B01J20/30
CPCB01J20/046B01J20/08B01J20/103B01J20/28016
Inventor 李建生赵燕禹李仕增王泽江刘红玉
Owner TIANJIN VOCATIONAL INST
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