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Adsorbent in use for separating heating element Cs, preparation and application

An adsorbent and element technology, which is applied in the post-processing field of high-level radioactive waste in the nuclear industry, can solve problems such as chromatography research and technological process that have not yet been reported, and achieve the effects of good identification ability, high adsorption capacity and simple operation.

Inactive Publication Date: 2007-12-26
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] However, the chromatographic research and process flow of the separation and recovery of Cs from HLLW by macroporous silicon-based supramolecular recognition materials with a silicon-based background have not been reported yet.

Method used

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  • Adsorbent in use for separating heating element Cs, preparation and application
  • Adsorbent in use for separating heating element Cs, preparation and application
  • Adsorbent in use for separating heating element Cs, preparation and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Embodiment 1 Adsorbent Calix[4]arene-R14 / SiO 2 - Preparation of P

[0037] Dissolve 100 g of Calix[4]arene-R14 (with structural formula (II)) and 60 g of tributylphosphate (TBP) in 500 mL of dichloromethane and mix well; add 200 g 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.

Embodiment 2

[0038] Example 2 Adsorbent Calix[4]arene-R14 / SiO 2 - Preparation of P

[0039] Dissolve 100 g of Calix[4]arene-R14 and 40 g of tributylphosphate (TBP) in 2000 mL of dichloromethane and mix well; add 1000 g of polymer-coated macroporous SiO 2 (SiO2-P) Stir evenly to volatilize most of the dichloromethane until the material is in a nearly dry state, and then dry the nearly dry material in vacuum at 45°C for 24 hours.

Embodiment 3

[0040] Example 3 Adsorbent Calix[4]arene-R14 / SiO 2 - Preparation of P

[0041] Dissolve 100 g of Calix[4]arene-R14 and 100 g of tributylphosphate (TBP) in 3000 mL of dichloromethane and mix well; add 1500 g 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.

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Abstract

A method for preparing absorbent used to separate heating element Cs out includes using materials of calixarene ether and macropore SiO2 covered with polymer to form said absorbent and setting mass of macropore SiO2 covered with polymer to be mass in 1-20 time of calixarene ether. The prepared absorbent uses calix[4] arene-R identification material to realize to separate and recover Cs from HLLW simultaneously in high selectively way.

Description

technical field [0001] The invention relates to the field of post-processing of high-level radioactive wastes in the nuclear industry, in particular to the separation of the exothermic element Cs in the high-level radioactive wastes. Background technique [0002] As high-level radioactive waste (HLLW) generated from spent fuel (SF) reprocessing, its safe handling and disposal is one of the key links in nuclear fuel cycle technology. According to the National Atomic Energy Development Policy, the rational and effective utilization of limited nuclear resources, ensuring safety, nuclear non-proliferation, environmental adaptability, economy, and effective disposal of HLLW through spent fuel reprocessing technology are its basic policies. [0003] Spent fuel contains exothermic elements, long-lived (millions of years) minor actinides (MA) and other fissure products (FP), the current status of post-processing is: in addition to the separation and recovery of useful metals U and P...

Claims

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Application Information

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IPC IPC(8): G21F9/12B01D15/08B01J20/26B01J20/10B01J20/32
Inventor 张安运
Owner ZHEJIANG UNIV
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