Method of adsorbing and separating rubidium and caesium

An adsorption separation and adsorbent technology, applied in the field of element separation, can solve the problems of difficult separation process, low selectivity, rubidium and cesium separation, etc., and achieve the effect of easy promotion, good selectivity and fast separation speed

Active Publication Date: 2019-09-06
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although there have been methods for separating rubidium and cesium mixtures from radioactive waste, such methods cannot further separate rubidium and cesium; rubidium and cesium have similar physical and chemical properties, and are often associated with lithium, sodium, potassium, magnesium, Calcium and other elements are symbiotic, the separation process is difficult, the selectivity is not high, and the separation time is long. Therefore, the prior art faces the separation problem of rubidium and cesium

Method used

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  • Method of adsorbing and separating rubidium and caesium
  • Method of adsorbing and separating rubidium and caesium
  • Method of adsorbing and separating rubidium and caesium

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1g is dissolved in the compound shown in structural formula (I) in 100.0mL dichloromethane, fully dissolves, and adds 10.0gSiO in the gained solution 2 -P Stir well to make SiO 2 -P is mixed evenly with the compound shown in the structural formula (I), and most of the dichloromethane is volatilized by rotary evaporation under reduced pressure until the material is in a near-dry state, and the organic molecules enter SiO under capillary action and physical adsorption. 2 -P pores, and then vacuum-dry the nearly dry material at 45°C for 24 hours to obtain an adsorbent.

Embodiment 2

[0033] 0.5g of the compound shown in the structural formula (I) was dissolved in 75.0mL of dichloromethane, fully dissolved, and 3.0g of SiO was added in the resulting solution 2 -P Stir well to make SiO 2 -P is mixed evenly with the compound shown in the structural formula (I), and most of the dichloromethane is volatilized by rotary evaporation under reduced pressure until the material is in a near-dry state, and the organic molecules enter SiO under capillary action and physical adsorption. 2 -P pores, and then vacuum-dry the nearly dry material at 50°C for 24 hours to obtain an adsorbent.

Embodiment 3

[0035] 0.7g of the compound shown in the structural formula (I) was dissolved in 80.0mL of dichloromethane, fully dissolved, and 5.0g of SiO was added in the resulting solution 2 -P Stir well to make SiO 2 -P is mixed evenly with the compound shown in the structural formula (I), and most of the dichloromethane is volatilized by rotary evaporation under reduced pressure until the material is in a near-dry state, and the organic molecules enter SiO under capillary action and physical adsorption. 2 -P pore size, and then vacuum-dry the nearly dry material at 55° C. for 24 hours to obtain an adsorbent.

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Abstract

The invention discloses a method of adsorbing and separating rubidium and caesium. The method comprises the following steps: carrying out adsorption on a solution containing rubidium and caesium and an adsorbent; and separating rubidium and caesium according to difference of adsorption rates of rubidium and caesium by the adsorbent, wherein the adsorbent is prepared by loading a compound as shownin a structural formula (I) to a carrier. The adsorbent in contact with caesium within a short time has the adsorption rate of nearly 100%, and the adsorbent has great difference on adsorption rates of rubidium and caesium, so that rubidium and caesium can be separated. The adsorbent does not adsorb other alkali metals, so that under the circumstance with associated elements, the method can separate rubidium and caesium from the solution. The method disclosed by the invention is mild in condition, good in selectivity, high in separation speed, simple to operate and easy to popularize.

Description

technical field [0001] The invention relates to the technical field of element separation, in particular to a method for adsorbing and separating rubidium and cesium. Background technique [0002] The wide application of nuclear energy not only brings various conveniences to human beings, but also brings huge health threats. In the process of using nuclear energy, a large amount of radioactive waste is often generated. These wastes degrade for a long time and easily cause serious environmental pollution. How to safely and effectively dispose of these radioactive wastes has become a key factor restricting the sustainable development of nuclear energy. [0003] Commonly used methods for treating radioactive waste include adsorption, ion exchange, and membrane separation. These methods involve a large number of equipment and complex processing steps; when dealing with high-level radioactive waste, each time the waste passes through a piece of equipment or structure Therefore, ...

Claims

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Application Information

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IPC IPC(8): C22B7/00C22B26/10B01J20/26B01J20/28B01J20/30
CPCB01J20/22B01J20/264B01J20/28085C22B7/005C22B26/10Y02P10/20
Inventor 张安运吴徐冰吕越政陈浩王政
Owner ZHEJIANG UNIV
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