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Preparation method of nano oxide coated long-life lithium ion sieve adsorbent

A nano-oxide and adsorbent technology, applied in the field of lithium resource recovery, can solve the problems of low extraction efficiency, difficult commercialization of production capacity, high adsorbent loss rate, increase specific surface area and wettability, improve ion exchange capacity, The effect of improving conductivity

Inactive Publication Date: 2016-11-09
SHANGHAI INST OF SPACE POWER SOURCES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Qinghai Lithium Industry, Tibet Mining Industry and Qinghai CITIC Guoan have started to extract lithium from salt lake brine to produce lithium carbonate. However, due to technical problems that have not been resolved, the output has been very small: (1) Qinghai Lithium Industry adopts lithium ion membrane The separation method is a relatively successful lithium extraction process in China, but there are still Li + The disadvantage of low extraction efficiency (less than 70%); (2) Qinghai CITIC Guoan adopts the calcination method. Due to the proven shortcomings of high energy consumption, high pollution, and high cost, it is already in a state of semi-stop production; (3) Blu-ray Lithium Industry The aluminate adsorption process is still in the pilot stage due to the difficulty of the process, high loss rate of adsorbent, low direct yield, and high cost.
In general, several technological routes for extracting lithium from brine that have been put into practical use in my country all have common problems such as poor adsorption capacity, low recovery rate, and low product purity of the adsorbent, which not only raises higher requirements for the process and equipment characteristics of the upstream and downstream industrial chains. requirements, and because of the waste of resources due to the high lithium content in the tail liquid, it is difficult to commercialize and expand production capacity

Method used

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  • Preparation method of nano oxide coated long-life lithium ion sieve adsorbent
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  • Preparation method of nano oxide coated long-life lithium ion sieve adsorbent

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Embodiment 1

[0031] Weigh 1~4g of aluminum nitrate powder, add 20~40ml of absolute ethanol, place it in an ultrasonic device and ultrasonicate for 1~3h, until the aluminum nitrate powder is dispersed and dissolved, and a colorless transparent solution is obtained. Weigh 33.3~66.6gLi 1.6 mn 1.6 o 2 Powder, for completely dispersed powder, add 50~100ml of absolute ethanol, and put it in the ultrasonic equipment for 1~3h to make Li 1.6 mn 1.6 o 2 Dispersion was complete, and a brown viscous suspension was obtained. Then mix the absolute ethanol solution containing aluminum nitrate and the suspension containing powder evenly with a magnetic stirring device, adjust the pH to 8~10 with 1M ammonia water, and at a stirring rate of 200~900r / min, 60~80 The absolute ethanol solvent was evaporated to dryness at low temperature. When the viscosity of the solution gradually increases to the point that it is difficult to stir, place it in a dry blast box at 60-80°C to make it completely dry. After...

Embodiment 2

[0038] Weigh 0.5-1.5g of nano-silica powder, add 20-40ml of absolute ethanol, and place it in an ultrasonic device for 1-3h until the nano-silica powder is dispersed to obtain a milky white suspension. Weigh 33.3~66.6gLi 1.6 mn 1.6 o 2 Powder, for complete dispersion of powder, add 50~100ml of absolute ethanol, and place it in an ultrasonic device for 1~3h to disperse the powder completely, and obtain a brown viscous suspension. Then mix the anhydrous ethanol suspension containing nano-silica and the suspension containing powder evenly with a magnetic stirring device, adjust the pH to 8~10 with 1M ammonia water, and stir at a stirring rate of 200~900r / min , 60 ~ 80 ℃ low temperature evaporation of absolute ethanol solvent. When the viscosity of the solution gradually increases to the point that it is difficult to stir, place it in a dry blast box at 60-80°C to make it completely dry. After cooling, take out the agglomerated, brown powder and grind it in a mortar until pulv...

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Abstract

The invention discloses a preparation method of a nano oxide coated long-life lithium ion sieve adsorbent. The method comprises the steps of: 1. dissolving a nano oxide and crushed lithium ion sieve adsorbent powder respectively in a same solvent according to a mass ratio of 1-10:100, and conducting ultrasonic dispersion for 0.5-3h to obtain two solutions; 2. mixing the two solutions uniformly, adjusting the PH to 8-10 with ammonia water, evaporating the solvent to dryness under stirring, and grinding the material obtained by evaporation to obtain nano oxide coated adsorbent powder; and 3. blending the nano oxide coated adsorbent powder with a polymer containing organic solution, conducting stirring for 2-4h, then adding the obtained suspension into deionized water drop by drop, thus obtaining the uniform spherical granular adsorbent with a particle size of 1-5mm. The preparation method of the nano oxide coated long-life lithium ion sieve adsorbent provided by the invention can improve the service life of the lithium ion sieve adsorbent.

Description

technical field [0001] The invention relates to a lithium resource recovery technology in the field of energy saving and emission reduction, in particular to a preparation method of a long-life lithium ion sieve adsorbent coated with nano oxides. Background technique [0002] With the continuous development and expanded application of power and energy storage new energy technology industries, the demand for lithium in the international market has maintained a rapid and continuous growth. At present, my country's lithium raw materials mainly come from the extraction of land ore, which accounts for only 12% of my country's total lithium reserves. Its mining costs are high and pollution is serious, and it has been unable to meet the needs of the growing new energy field. From my country's total lithium reserves, more than 86% Extracting and recycling lithium from salt lakes is the only way to develop new energy strategic industries. [0003] my country's lithium carbonate produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/04B01J20/28B01J20/30
CPCB01J20/04B01J20/0222B01J20/28016B01J2220/4806
Inventor 徐碇皓吴勇民马瑞汤卫平
Owner SHANGHAI INST OF SPACE POWER SOURCES
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