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Adsorbent capable of separating heating element cesium and strontium at the same time and its preparation method and application

A simultaneous separation and adsorbent technology, applied in the direction of chemical instruments and methods, non-metallic elements, and other chemical processes, to achieve the effects of increased desorption rate, sufficient safety, and high adsorption capacity

Inactive Publication Date: 2007-10-24
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The chromatographic study and process flow of the simultaneous separation and recovery of exothermic elements Cs and Sr from HLLW by macroporous silicon-based supramolecular recognition materials based on silicon-based materials have not been reported yet

Method used

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  • Adsorbent capable of separating heating element cesium and strontium at the same time and its preparation method and application
  • Adsorbent capable of separating heating element cesium and strontium at the same time and its preparation method and application
  • Adsorbent capable of separating heating element cesium and strontium at the same time and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The preparation of embodiment 1 adsorbent

[0049] 100 grams of Calix[4]arene with structural formula (II) and 48 grams of 4,4',-bis(tert-butylcyclohexyl)-18-crown-6 were dissolved in 1000 mL of methylene chloride and mixed uniformly; 300 grams of Polymer-coated macroporous SiO 2 (SiO 2 -P) Stir evenly to volatilize most of the dichloromethane until the material is in a nearly dry state, and then vacuum-dry the nearly dry material at 45° C. for 24 hours. (1:2)

Embodiment 2

[0050] The preparation of embodiment 2 adsorbent

[0051] 100 grams of Calix[4]arene with structural formula (II) and 24 grams of 4,5',-bis(tert-butylcyclohexyl)-18-crown-6 were dissolved in 1500 mL of dichloromethane and mixed uniformly; Polymer-coated macroporous SiO 2 (SiO 2 -P) Stir evenly to volatilize most of the dichloromethane until the material is in a nearly dry state, and then vacuum-dry the nearly dry material at 45° C. for 24 hours.

Embodiment 3

[0052] Example 3 Preparation of Adsorbent

[0053] 100 grams of Calix[4]arene with structural formula (II) and 100 grams of 4,4',-bis(tert-butylcyclohexyl)-18-crown-6 were dissolved in 3000mL of dichloromethane and mixed uniformly; Polymer-coated macroporous SiO 2 (SiO 2 -P) Stir evenly to volatilize most of the dichloromethane until the material is in a nearly dry state, and then vacuum-dry the nearly dry material at 45° C. for 24 hours.

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Abstract

The invention relates to the absorbent manufacturing for separating Cs and Sr, made of crown ether and aromatic ether loaded on the big hole SiO2 coated with polymer, molecule ratio of the composition being 0. 3-2. 0, mass of the SiO2 being 2-40 times of the total mass of the aromatic ether that has general structural formula I and crown ether 4, and the Sio2 being phenylethene and divinylbenzene polymer. It does not need special dilution or solution treatment, getting over the deficiency of solution extracting, preserving the high volume of extraction.

Description

technical field [0001] The invention relates to the field of post-treatment of high-level radioactive waste in the nuclear industry, in particular to an adsorbent for simultaneously separating heat-generating elements Cs and Sr in high-level radioactive waste and its preparation method and application. Background technique [0002] As the high-level radioactive waste (HLLW) produced by spent fuel (SF) reprocessing, its safe treatment and disposal is one of the key links in nuclear fuel cycle technology. [0003] Spent fuel contains fragmentation products (FP) such as exothermic elements and long-lived (millions of years) minor actinides (MA). and almost all FP elements went into HLLW. For long-lived MA, separation / transmutation technology has been proposed and some extraction and separation processes developed for this purpose (such as the TRUEX process using CMPO in the United States and the DIAMEX process using ammonia compounds in France, etc.), but the heat generation ...

Claims

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Application Information

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IPC IPC(8): B01J20/10B01J20/22C22B26/00G21F9/12
Inventor 张安运
Owner ZHEJIANG UNIV
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