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Method for separating lithium in salt lake brine through powder-type titanium ion exchanger

A technology of ion exchanger and salt lake brine, which is applied in the field of separating lithium ions in salt lake brine, titanium-based powder ion exchanger, can solve the problems of low recycling rate, low adsorption capacity, high equipment cost, etc., and achieve high cost and high cost. Adsorption capacity, effect of strict equipment operation

Active Publication Date: 2019-08-09
JIANGSU TOP FINE NEW RAW MATERIAL CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the adsorbents in the prior art have technical problems such as low adsorption capacity, poor selectivity, low recycling rate, and high equipment cost.

Method used

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  • Method for separating lithium in salt lake brine through powder-type titanium ion exchanger
  • Method for separating lithium in salt lake brine through powder-type titanium ion exchanger
  • Method for separating lithium in salt lake brine through powder-type titanium ion exchanger

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Take a certain amount of powdered titanium-based ion exchanger to make a 200g / L slurry with deionized water, heat it to 40°C in a reaction tank, slowly add the acid solution while stirring, drop the final pH to 4.5, and mature for 8 hours After filtering, repeat the operation until the Li content in the ion exchanger accounts for the TiO 2 content of 1%; use alkaline substances to adjust the alkalinity of salt lake brine to 1 times The turbidity of the filtered brine is 5JTU, put the filtered brine into the ion exchange tank; use the filtered brine to make slurry for the ion exchanger, disperse evenly and put it into the ion exchange tank, after the stirring reaction is complete, filter the slurry After solid-liquid separation, wash the filter cake with deionized water until the conductivity of the washing water is 300μs / cm; use deionized water to make a 300g / L slurry for the filter cake, heat it to 40°C in a reaction tank, and slowly add Acid solution, the pH of the ...

Embodiment 2

[0043] Take a certain amount of powdered titanium-based ion exchanger and make a 600g / L slurry with deionized water, heat it to 75°C in a reaction tank, slowly add acid solution while stirring, drop the final pH to 1.5, and mature for 5 hours After filtering, repeat the operation until the Li content in the ion exchanger accounts for the TiO 2 content of 0.5%; use alkaline substances to adjust the alkalinity of salt lake brine to 1.25 times The turbidity of the filtered brine is 2JTU, put the filtered brine into the ion exchange tank; use the filtered brine to make slurry for the ion exchanger, disperse evenly and put it into the ion exchange tank, after the stirring reaction is complete, filter the slurry After solid-liquid separation, wash the filter cake with deionized water until the conductivity of the washing water is 200μs / cm; use deionized water to make a 600g / L slurry for the filter cake, heat it to 75°C in a reaction tank, and slowly add Acid solution, the pH of th...

Embodiment 3

[0045] Take a certain amount of powdered titanium-based ion exchanger and make a 400g / L slurry with deionized water, heat it to 60°C in a reaction tank, slowly add acid solution while stirring, drop the final pH to 4.0, and mature for 2 hours After filtering, repeat the operation until the Li content in the ion exchanger accounts for the TiO 2 content of 0.01%; use alkaline substances to adjust the alkalinity of salt lake brine to 1.5 times The turbidity of the filtered brine is 3JTU, put the filtered brine into the ion exchange tank; use the filtered brine to make slurry for the ion exchanger, disperse evenly and put it into the ion exchange tank, after the stirring reaction is complete, filter the slurry After solid-liquid separation, wash the filter cake with deionized water until the conductivity of the washing water is 100μs / cm; use deionized water to make a 400g / L slurry for the filter cake, heat it to 60°C in a reaction tank, and slowly add Acid solution, the pH of th...

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Abstract

The invention relates to a method for separating lithium in salt lake brine through a powder-type titanium ion exchanger. The method comprises the steps that the appropriate powder-type titanium ion exchanger is selected, firstly, the exchanger is effectively activated, then the salt lake brine is adjusted by certain alkalinity, mechanical impurities such as sediment and silt are removed through filtering, the activated ion exchanger and the brine are mixed in an ion exchange pool, after an exchange reaction is conducted for a period of time, the ion exchanger and the salt lake brine are subjected to solid-liquid separation, the separated ion exchanger is subjected to lithium removing treatment through an acid solution, thus a lithium-rich solution and a regenerated ion exchanger can be obtained, and the lithium-rich solution can be used for producing lithium carbonate and lithium hydroxide after being subjected to impurity removing. According to the method, an equipment technologicalprocess is simple, the adsorption capacity of lithium ions of the ion exchanger is high, selectivity is high, and the service life is long.

Description

technical field [0001] The invention relates to a method for separating lithium in salt lake brine by a powder-type titanium-based ion exchanger, in particular to a method for separating lithium ions in salt-lake brine using a high-selectivity and high-capacity titanium-based powder-type ion exchanger . Background technique [0002] As the metal element with the smallest atomic weight, lithium has extremely strong electrochemical activity and extremely active chemical properties. Therefore, lithium can easily react with other materials to form various alloys, which are widely used in various fields. The application of lithium can be summarized into three major fields of new energy, new materials and medical treatment, mainly including batteries, aerospace, nuclear fusion power plants, metallurgy, ceramics, glass, grease, medicine and other subdivided fields. [0003] According to USGS statistics, the current composition of global lithium resources is mainly salt lake brine...

Claims

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Application Information

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IPC IPC(8): C22B3/42C22B26/12
CPCC22B3/42C22B26/12
Inventor 杨伟伟朱贤荣蒋磊
Owner JIANGSU TOP FINE NEW RAW MATERIAL CO LTD
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