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Extraction method for rubidium ions and cesium ions

A technology of cesium ion and rubidium ion, which is applied in the extraction field of rubidium ion and cesium ion, can solve the problems of low extraction efficiency of Rb and Cs, and achieve the effect of avoiding difficulty in phase separation, reducing the demand for basicity, and improving extraction efficiency.

Active Publication Date: 2017-02-22
CHINA ENFI ENGINEERING CORPORATION
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0005] The main purpose of the present invention is to provide a kind of extraction method of rubidium ion and cesium ion, to solve the problem that the extraction efficiency of Rb and Cs is lower in the prior art

Method used

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  • Extraction method for rubidium ions and cesium ions
  • Extraction method for rubidium ions and cesium ions
  • Extraction method for rubidium ions and cesium ions

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preparation example Construction

[0040] The process of preparing composite extractant is not limited to the above-mentioned preferred embodiment, when composite extractant includes phenolic extractant, acidic extractant, neutral organic matter and hydrocarbon solvent, above-mentioned preparation method can also comprise: extracting phenol Mixing agent, hydrocarbon solvent and neutral organic matter to form a premix, and adding acidic extractant to the premix to form a composite extractant; or mixing acidic extractant, hydrocarbon solvent and neutral organic to form a premix, and The phenolic extractant is added to the premix to form a composite extractant; or the neutral organic matter is divided into the first neutral organic part and the second neutral organic part, and the hydrocarbon solvent is divided into the first hydrocarbon solvent part and the second part. Two hydrocarbon solvent parts, the phenolic extractant, the first neutral organic part and the first hydrocarbon solvent part are mixed to form th...

Embodiment 1

[0048] The extraction method of rubidium ion and cesium ion provided by the present embodiment comprises the following steps:

[0049] At first, provide a kind of sulfate solution that contains 123mg / L Cs ion, 690mg / L Rb ion as mixed solution, its pH=9.0, utilize compound extractant to carry out the first extraction treatment to this mixed solution, compound extractant and mixed solution The volume ratio is 1:11, extract at room temperature for 15 minutes, and obtain the first organic phase and the first raffinate; then, use the compound extractant to carry out the second extraction treatment on the first raffinate, the compound extractant and the mixed solution The volume ratio is 1:1, and the extraction time is 20min to obtain the second organic phase and the second raffinate; finally, using stripping agent H 2 SO 4 A solution with a mass concentration of 10% is used for stripping the first organic phase, and the volume ratio of the stripping agent used to the first organic...

Embodiment 2

[0052] The difference between the extraction method provided by the present embodiment and embodiment 1 is:

[0053] The molar ratio of phenolic extractant to acidic extractant is 1:0.1.

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Abstract

The invention provides an extraction method for rubidium ions and cesium ions. The extraction method comprises the steps of subjecting a mixed solution of rubidium ions and cesium ions to the first extraction treatment by using a composite extraction agent so as to obtain a first organic phase and a first raffinate, wherein the compound extraction agent comprises at least one component selected from an acidic extractant and a neutral organic matter, and a phenol extraction agent shown in a structural formula I; subjecting the first raffinate to a second extraction treatment by using the composite extraction agent so as to obtain a second organic phase and a second raffinate; subjecting the first organic phase to the back extraction treatment by using a back extraction agent so as to obtain a cesium salt-containing stripping solution; and subjecting the second organic phase to the back extraction treatment by using the back extraction agent so as to obtain a rubidium salt-containing stripping solution, wherein R1=CnH2n+1, 0<=n<=25, R2=CmH2m+1, 0<=m<=25. Based on the above extraction method, the extraction effect of rubidium ions and cesium ions is improved.

Description

technical field [0001] The invention relates to the technical field of chemical materials, in particular to a method for extracting rubidium ions and cesium ions. Background technique [0002] Rubidium (Rb) and cesium (Cs) are important rare and precious metal resources. Rb metal, Cs metal and their compounds are widely used in modern science and technology fields such as energy, chemical industry, medicine, and biology, and can be used to prepare biochemical reagents, catalysts, and electronic devices. , photocells and special glass and other products, therefore, the extraction and production of Rb metal and Cs metal is of great significance. [0003] Solvent extraction method is one of the effective methods to separate rubidium (Rb) and cesium (Cs) from solution. Existing extraction methods commonly use 4-tert-butyl-2 (α-methylbenzyl) phenol (t-BAMBP) or 4-sec-butyl-2-(α-methylbenzyl) phenol (BAMBP) as extraction agent system. [0004] However, since the above-mentioned...

Claims

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Application Information

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IPC IPC(8): C22B3/40C22B26/10
CPCC22B26/10C22B3/3844C22B3/402C22B3/409Y02P10/20
Inventor 王玮玮徐月和杜国山吕东周文龙
Owner CHINA ENFI ENGINEERING CORPORATION
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