Preparation method of lithium extraction adsorbent

A technology of adsorbent and lithium salt, applied in the field of preparation of lithium extraction adsorbent, can solve the problems of increasing the amount of lithium salt, high insertion rate, difficult to achieve, etc., and achieves the effect of superior performance

Active Publication Date: 2020-06-02
XIAN LANSHEN NEW MATERIAL TECHNOLOGY CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Therefore, if the amount of lithium salt added in the reaction is near the theoretical value, it is difficult to achieve a high insertion rate
Simply increase the amount of lithium salt, there will be a large amount of unreacted lithium salt in the mother liquor, which will increase the cost of preparing lithium extraction adsorbent

Method used

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  • Preparation method of lithium extraction adsorbent
  • Preparation method of lithium extraction adsorbent
  • Preparation method of lithium extraction adsorbent

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preparation example Construction

[0031] see figure 1 , the preparation method of a kind of lithium extracting adsorbent of the present invention, comprises the following steps:

[0032] S1, the preparation of the mixed solution, preparing an aqueous solution containing 1-2mol / L aluminum salt, 2-4mol / L lithium salt, and 0-2mol / L third salt MX;

[0033] Lithium salts include lithium chloride, lithium bromide, lithium carbonate, lithium nitrate, lithium sulfate, and the like.

[0034] The aluminum salt has the same anion as the lithium salt, including aluminum chloride, aluminum bromide, aluminum carbonate, aluminum nitrate, aluminum sulfate, potassium aluminum sulfate dodecahydrate, and the like.

[0035] The third salt has the same anion as the lithium salt and the same cation as the base, including sodium salt, potassium salt, ammonium salt, calcium salt, magnesium salt, and the like.

[0036] S2, the preparation of lye, the preparation of an aqueous solution containing 1 to 3 mol / L of alkali;

[0037] The...

Embodiment 1

[0053] Add 108.5g of lithium chloride, 309.0g of crystalline aluminum chloride, 74.8g of sodium chloride and pure water into a 2L beaker, stir well and transfer to a 5L three-necked flask equipped with mechanical stirring and a thermometer, and raise the temperature to 45°C under stirring Keep warm to obtain a solution containing lithium chloride 2.0mol / L, aluminum chloride 1.0mol / L, and sodium chloride 1.0mol / L. Under this condition, slowly add 1920mL2mol / L sodium hydroxide solution to the flask, and then add The ratio of the amount of sodium hydroxide to aluminum chloride is about 3.00:1, and the reaction is stopped after continuing to stir for 2.0 hours, and the reaction mixture is filtered with suction to obtain clarified mother liquor and wet active body.

[0054] The obtained wet solid was dried at 40° C. for 16.0 h to obtain a dry active body. Crush the dry solid into a 140 mesh powder. Weigh 50.0g of the obtained powder, 4.0g of chlorinated polyvinyl chloride and 20.0...

Embodiment 2

[0056] Measure 3.0L of the clarified mother liquor obtained in Example 1 and put it into a 5L there-necked flask, evaporate and remove 2.5L of water, that is, concentrate 6 times, after the crystals are precipitated overnight, wash with suction to obtain crystals and clear and concentrated mother liquor, the obtained crystals are Sodium chloride, the purity is greater than 95% after drying.

[0057] Weigh 144.9g of crystalline aluminum chloride, measure 300mL of concentrated mother liquor, put it in a 1L beaker, add pure water, stir and transfer it to a 3L three-necked flask equipped with a mechanical stirrer and a thermometer, heat it up to 45°C while stirring, and keep it warm to obtain Contain lithium chloride 2.0mol / L, aluminum chloride 1.0mol / L, sodium chloride 1.1mol / L solution, add 900mL 2mol / L sodium hydroxide solution slowly under this condition, the sodium hydroxide added at this moment and The ratio of aluminum chloride to substance is about 3.00:1. After continuing...

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Abstract

The invention discloses a preparation method of a lithium extraction adsorbent. The preparation method comprises the following steps: preparing a mixed salt solution containing 1-2mol / L of aluminum salt, 2-4mol / L of lithium salt and 0-2mol / L of third salt MX; preparing an aqueous solution containing 1-3 mol / L of alkali; adding the alkali-containing aqueous solution into the mixed salt solution ina stirring state, carrying out stirring, and carrying out solid-liquid separation on the reaction mixture to obtain a reaction mother solution and an active body; drying the active body and crushing the active body into powder; uniformly kneading the powder with a polymer and a solvent, and then carrying out extrusion molding; and carrying out drying, crushing, and screening particles with the particle size of 0.6-2.0 mm to obtain an adsorbent finished product. According to the method, the aluminum-based lithium extraction adsorbent with excellent performance can be prepared on the premise ofcontrollable cost.

Description

technical field [0001] The invention belongs to the technical field of new materials, and in particular relates to a preparation method of a lithium extraction adsorbent. Background technique [0002] Lithium is known as "the upstart of energy in the 21st century" and is an important "strategic resource" in the field of national economy and national defense construction. Lithium is the lightest metal in nature. It has unique physical and chemical properties such as high specific heat, high electrical conductivity and strong chemical activity. It is widely used in lithium batteries, aluminum-lithium alloys, glass, ceramics, lubricants, medicine, nuclear energy and other fields. applications have attracted widespread attention. Salt lake lithium resources account for 70% to 80% of the global lithium resource reserves, and the cost of extracting lithium from salt lake brine is low. Therefore, the mining of lithium resources has gradually shifted from traditional ore extraction...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/28B01J20/26B01J20/30C22B3/24C22B26/12
CPCB01J20/28016B01J20/261B01J20/262B01J20/04B01J20/046B01J20/043B01J20/045B01J20/0277B01J20/0281B01J20/0296B01J20/0288C22B26/12C22B3/24B01J2220/46Y02P10/20
Inventor 梅昂张运冯志军张国华谭晓龙刘耀龙张仁姗冯鹏孙冰杰
Owner XIAN LANSHEN NEW MATERIAL TECHNOLOGY CO LTD
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