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Method for recovering rubidium and cesium in salt lake brine by using heteropolyacid salt electrode

A technology for heteropoly acid salt and salt lake brine, applied in the field of separation and recovery of valuable metals in salt lake brine, can solve problems such as long time consumption, and achieve the effects of improving separation and recovery efficiency, low cost and low energy consumption

Active Publication Date: 2022-06-28
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the sedimentation-flotation method takes a long time

Method used

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  • Method for recovering rubidium and cesium in salt lake brine by using heteropolyacid salt electrode
  • Method for recovering rubidium and cesium in salt lake brine by using heteropolyacid salt electrode
  • Method for recovering rubidium and cesium in salt lake brine by using heteropolyacid salt electrode

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Experimental program
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Embodiment 1

[0057] This embodiment provides a method for preparing a heteropolyacid salt molecular sieve and a heteropolyacid salt electrode thereof. The method for preparing a heteropolyacid salt molecular sieve includes: mixing 28.47g of sodium silicate nonahydrate, 8.02g of sodium chloride, 3.016g of Mix g sodium hydroxide with 65 mL deionized water to obtain mixed solution A; mix 9.45 g of oxalic acid with 25 mL of deionized water, and then add 1.83 g of sodium metavanadate to obtain mixed solution B; add mixed solution B to mixed solution A , mixed and stirred for 1 h, aged for 24 h, and then hydrothermally reacted at 180 ° C for 36 h, filtered, washed and dried to obtain sodium vanadyl silicate.

[0058] The preparation method of the heteropolyacid salt electrode includes: stirring and mixing sodium vanadyl silicate, polyvinylidene fluoride and dimethylformamide, and the mass ratio of the sodium vanadyl silicate and polyvinylidene fluoride is 1:0.125, The obtained slurry is coated o...

Embodiment 2

[0060] This embodiment provides a method for preparing a heteropolyacid salt molecular sieve and a heteropolyacid salt electrode thereof. The method for preparing a heteropolyacid salt molecular sieve includes: mixing 28.47g of sodium silicate nonahydrate, 8.02g of sodium chloride, 3.016g of Mix g sodium hydroxide with 65 mL deionized water to obtain mixed solution A; mix 9.45 g of oxalic acid with 25 mL of deionized water, and then add 1.75 g of sodium metavanadate to obtain mixed solution B; add mixed solution B to mixed solution A , mixed and stirred for 1 h, aged for 4 h, and then hydrothermally reacted at 230 ° C for 24 h, filtered, washed and dried to obtain sodium vanadiosilicate.

[0061] The preparation method of the heteropolyacid salt electrode comprises: stirring and mixing sodium vanadyl silicate, polyvinylidene fluoride and dimethylformamide, and the mass ratio of the sodium vanadyl silicate and polyvinylidene fluoride is 1:0.1, The obtained slurry is coated on t...

Embodiment 3

[0063] This embodiment provides a method for preparing a heteropolyacid salt molecular sieve and a heteropolyacid salt electrode thereof. The method for preparing a heteropolyacid salt molecular sieve includes: mixing 28.47g of sodium silicate nonahydrate, 8.02g of sodium chloride, 3.016g of Mix g sodium hydroxide with 65 mL deionized water to obtain mixed solution A; mix 9.45 g of oxalic acid with 25 mL of deionized water, and then add 2.73 g of vanadium pentoxide to obtain mixed solution B; add mixed solution B to mixed solution A , mixed and stirred for 1 h, aged for 30 h, and then hydrothermally reacted at 200 ° C for 30 h, filtered, washed and dried to obtain sodium vanadyl silicate.

[0064] The preparation method of the heteropolyacid salt electrode comprises: stirring and mixing sodium vanadyl silicate, polyvinylidene fluoride and dimethylformamide, and the mass ratio of the sodium vanadyl silicate and polyvinylidene fluoride is 1:0.15, The obtained slurry is coated on...

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Abstract

The invention relates to a method for recovering rubidium and cesium in salt lake brine by using a heteropolyacid salt electrode, which comprises the following steps: (1) placing the heteropolyacid salt electrode in the salt lake brine, and applying a reduction potential to obtain the heteropolyacid salt electrode loaded with alkali metal ions; (2) putting the heteropolyacid salt electrode loaded with the alkali metal ions in the step (1) into regeneration liquid, and applying oxidation potential to realize release of the alkali metal ions; the heteropolyacid salt electrode in the step (1) contains a vanadium source; the valence state of vanadium in the vanadium source is + 5. According to the heteropolyacid salt electrode, valence state changes of central elements of the heteropolyacid salt electrode are regulated and controlled through potential, so that alkali metal ions are captured and released, other chemical reagents do not need to be added in the regeneration process, and harmless recovery of rubidium and cesium resources in the salt lake brine is achieved; the heteropolyacid salt electrode is low in preparation cost, high in ion exchange capacity, low in energy consumption in the metal ion recovery process and free of secondary pollution.

Description

technical field [0001] The invention belongs to the field of separation and recovery of valuable metals in salt lake brine, in particular to a method for recovering rubidium and cesium in salt lake brine by using a heteropolyacid salt electrode. Background technique [0002] With the gradual expansion of the application of rubidium-cesium in catalysts, biomedicine, high-tech products and other fields, and the gradual depletion of rubidium-cesium ore resources, people turn their attention to the salt lake resources with huge reserves of rubidium-cesium. At the same time, the leaching of rubidium-cesium ions from ore has caused serious environmental pollution, while the extraction of rubidium-cesium resources from salt lakes avoids calcination and leaching, and is an environmentally friendly extraction method. Therefore, it is of great significance to extract rubidium and cesium resources from salt lakes. [0003] At present, the separation technologies of rubidium and cesium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B7/00C22B26/10
CPCC22B7/006C22B26/10Y02P10/20
Inventor 杨良嵘边阳阳邢慧芳戎猛孟启宇刘会洲
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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