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Preparation method of precursor sol for metatitanic acid lithium ion sieve

A lithium ion and precursor technology is applied in the field of preparation of precursor sol for metatitanate lithium ion sieve, which can solve the problems of inability to meet production requirements, increase in sol viscosity, and difficulty in repeated loading of sol, so as to improve load utilization. The effect of increasing the rate, uniform dispersion, and prolonging the stable existence time of the sol

Inactive Publication Date: 2019-03-01
NEIJIANG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of this invention is to provide a kind of preparation method of precursor sol for metatitanic acid type lithium ion sieve, to solve the poor stability of its precursor sol itself in the preparation process of existing metatitanic acid type lithium ion sieve (sol viscosity increase rapidly, or even transform into gel), which makes it difficult for the same batch of sol to be repeatedly loaded on the substrate, so that the loading of the sol on the substrate is very limited, and the utilization rate of the sol is low, which cannot meet the production needs.

Method used

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  • Preparation method of precursor sol for metatitanic acid lithium ion sieve

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Embodiment 1

[0030] The preparation method of the precursor sol for metatitanate type lithium ion sieve of the present embodiment, it comprises:

[0031] (1) Add methanol, Gemini surfactant and triethanolamine to deionized water and stir evenly to obtain a mixed surfactant solution; wherein methanol, Gemini surfactant and triethanolamine account for 0.05% of the total volume of the mixed surfactant solution respectively %, 0.01% and 0.5%, and the Gemini surfactant is a cationic Gemini surfactant.

[0032] (2) Put titanium sulfate in deionized water and stir until it is completely dissolved, then after purification by weakly basic anion exchange resin, adjust the pH of the mixed solution purified by weakly basic anion exchange resin to 3, and then add it to the mixing surface The active agent solution is stirred until uniform to obtain a mixed solution;

[0033] (3) Add concentrated ammonia water to the mixed solution under stirring to adjust the pH to 8.5, and obtain a white precipitate; ...

Embodiment 2

[0038] The preparation method of the precursor sol for metatitanate type lithium ion sieve of the present embodiment, it comprises:

[0039] (1) Add methanol, Gemini surfactant and triethanolamine to deionized water and stir evenly to obtain a mixed surfactant solution; wherein methanol, Gemini surfactant and triethanolamine account for 0.07% of the total volume of the mixed surfactant solution respectively %, 0.05% and 0.75%, and the Gemini surfactant is a cationic Gemini surfactant.

[0040] (2) Put titanium sulfate in deionized water and stir until it is completely dissolved, then after purification by weakly basic anion exchange resin, after the pH of the mixed solution purified by weakly basic anion exchange resin is adjusted to 3.5, add mixed surface active agent solution, stirred until uniform, to obtain a mixed solution;

[0041] (3) adding concentrated ammonia water to the mixed solution under stirring to adjust the pH to 9 to obtain a white precipitate;

[0042] (4...

Embodiment 3

[0046] The preparation method of the precursor sol for metatitanate type lithium ion sieve of the present embodiment, it comprises:

[0047] (1) Add methanol, Gemini surfactant and triethanolamine to deionized water and stir evenly to obtain a mixed surfactant solution; wherein methanol, Gemini surfactant and triethanolamine account for 0.1% of the total volume of the mixed surfactant solution respectively %, 0.1% and 1%, and the Gemini surfactant is a cationic Gemini surfactant.

[0048] (2) Put titanium sulfate in deionized water and stir until completely dissolved, then after purification by weakly basic anion exchange resin, after the pH of the mixed solution purified by weakly basic anion exchange resin is adjusted to 4, add mixed surface active agent solution, stirred until uniform, to obtain a mixed solution;

[0049] (3) Add concentrated ammonia water to the mixed solution under stirring to adjust the pH to 8.5, and obtain a white precipitate;

[0050] (4) After clea...

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Abstract

The invention discloses a preparation method of precursor sol for a metatitanic acid lithium ion sieve, and belongs to the technical field of titanium-type lithium ion sieve preparation. The preparation method includes the steps: treating and purifying titanium sulfate by anion exchange resin, adding mixed surfactants comprising methanol, Gemini surfactants and triethanolamine and adding strongerammonia water to obtain white precipitates; diluting and dispersing the white precipitates after cleaning to obtain white slurry, adding lithium acetate solution into the white slurry, uniformly mixing the lithium acetate solution and the white slurry, adding H2O2 solution and stirring the solution to obtain transparent yellow sol. According to the preparation method, by the aid of the mixed surfactant solution, a titanium source and a lithium source are more uniformly dispersed, stable existence time of the sol is prolonged, and the load use ratio of the sol is increased.

Description

technical field [0001] The invention relates to the technical field of preparation of titanium-type lithium ion sieves, in particular to a method for preparing a precursor sol for metatitanic acid-type lithium ion sieves. Background technique [0002] The supply of lithium resources in my country is mainly extracted from ore, but with the massive development of lithium resources, my country's lithium ore reserves can no longer meet people's demand for lithium resources in the future. Therefore, liquid lithium from salt lake brine and seawater with large lithium reserves Extracting lithium from resources has become an important direction and an inevitable choice for obtaining lithium resources. However, lithium resources in brine mainly coexist in the form of ions with a large amount of alkali metal and alkaline earth metal ions. Most brines have low lithium content and my country's salt lake brine has a high ratio of magnesium to lithium, so the technical difficulty of develo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/00
CPCC01G23/005
Inventor 张理元万相君由耀辉刘义武孙绪兵税亿徐文勇赵玲玲朱萍王悦
Owner NEIJIANG NORMAL UNIV
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