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Aluminum salt adsorbent and application thereof in extraction of lithium in salt lake brine

A salt lake brine and adsorbent technology, applied in other chemical processes, process efficiency improvement, chemical instruments and methods, etc., can solve the problems of large dissolution loss rate, poor permeability and fluidity, etc., to reduce pollution and reduce impact. , the effect of reducing the dissolution loss rate

Inactive Publication Date: 2018-11-23
JIANGSU JIUWU HITECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the currently developed materials are generally in the form of powder, with poor permeability and fluidity, and a large rate of dissolution loss during exchange.

Method used

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  • Aluminum salt adsorbent and application thereof in extraction of lithium in salt lake brine
  • Aluminum salt adsorbent and application thereof in extraction of lithium in salt lake brine
  • Aluminum salt adsorbent and application thereof in extraction of lithium in salt lake brine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Preparation method of aluminum salt adsorbent:

[0027] Step 1, the preparation of aluminum hydroxide: prepare an aqueous solution containing 2mol / L aluminum nitrate nonahydrate and 1mol / L lithium chloride, add urea for reaction, the molar ratio of urea to aluminum nitrate is 8:1, and the reaction time is 2h , the reaction temperature is 20°C. After the reaction, the obtained gel is centrifuged, washed with deionized water, and then centrifuged to obtain a lithium-intercalated aluminum hydroxide gel;

[0028] Step 2, modification of aluminum hydroxide: mix lithium-intercalated aluminum hydroxide gel with ethanol aqueous solution, and then add dropwise an ethanol solution of 5wt% γ-(methacryloyloxy)propyltrimethoxysilane for reaction , the weight ratio of lithium-intercalated aluminum hydroxide gel, ethanol aqueous solution, and ethanol solution of silane coupling agent is 1:8:5, the reaction time is 2 hours, and the reaction temperature is 25°C. After the reaction is co...

Embodiment 2

[0031] Preparation method of aluminum salt adsorbent:

[0032] Step 1, preparation of aluminum hydroxide: prepare an aqueous solution containing 5mol / L aluminum nitrate nonahydrate and 2mol / L lithium chloride, add urea for reaction, the molar ratio of urea to aluminum nitrate is 12:1, and the reaction time is 4h , the reaction temperature is 40°C. After the reaction, the obtained gel is centrifuged, washed with deionized water, and then centrifuged to obtain a lithium-intercalated aluminum hydroxide gel;

[0033] Step 2, modification of aluminum hydroxide: mix lithium-intercalated aluminum hydroxide gel with ethanol aqueous solution, and then dropwise add 10wt% ethanol solution of γ-(methacryloyloxy)propyltrimethoxysilane to react , the weight ratio of lithium-intercalated aluminum hydroxide gel, ethanol aqueous solution, and ethanol solution of silane coupling agent is 1: 12: 10, the reaction time is 3 hours, and the reaction temperature is 35 ° C. After the reaction is compl...

Embodiment 3

[0036] Preparation method of aluminum salt adsorbent:

[0037] Step 1, preparation of aluminum hydroxide: prepare an aqueous solution containing 4mol / L aluminum nitrate nonahydrate and 2mol / L lithium chloride, add urea for reaction, the molar ratio of urea to aluminum nitrate is 10:1, and the reaction time is 3h , the reaction temperature is 30°C. After the reaction, the obtained gel is centrifuged, washed with deionized water, and then centrifuged to obtain a lithium-intercalated aluminum hydroxide gel;

[0038] Step 2, modification of aluminum hydroxide: mix lithium-intercalated aluminum hydroxide gel with ethanol aqueous solution, and then add dropwise an ethanol solution of 5wt% γ-(methacryloyloxy)propyltrimethoxysilane for reaction , the weight ratio of lithium-intercalated aluminum hydroxide gel, ethanol aqueous solution, and ethanol solution of silane coupling agent is 1:10:7, the reaction time is 2 hours, and the reaction temperature is 30°C. After the reaction, the pr...

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Abstract

The invention relates to an aluminum salt adsorbent and application thereof in extraction of lithium in salt lake brine, and belongs to the technical field of extraction of lithium resources. According to the aluminum salt adsorbent and the application thereof, aluminum hydroxide is adopted as the adsorbent, and meanwhile, macroporous resin subjected to modification treatment is adopted as a carrier. The adsorbent is suitable for adsorption separation of the lithium in the salt lake brine, and a catalyst has the advantages of being high in adsorption capacity and low in dissolution loss rate.

Description

technical field [0001] The invention relates to an aluminum salt adsorbent and its use in extracting lithium from salt lake brine, belonging to the technical field of lithium resource extraction. Background technique [0002] Lithium is the lightest metal and alkali metal with the smallest radius known so far. It is one of the important rare metals in our country, widely used in new energy, atomic energy industry, chemical aerospace and many other fields. Since lithium and its compounds are widely used in many fields, the source of lithium has attracted more and more attention. Salt lake brine is considered to be an important source for the future. Li in brine + It often coexists with a large amount of alkali metal and alkaline earth metal ions in trace amounts. Because their chemical properties are very similar. It is very difficult to separate and extract lithium from it. At present, lithium is mostly extracted from brine in the form of lithium carbonate and lithiu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C22B7/00C22B26/12
CPCB01J20/08B01J20/265C22B7/00C22B26/12Y02P10/20
Inventor 顾俊杰彭文博熊福军曹恒霞
Owner JIANGSU JIUWU HITECH
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