Method for separating element Pd from high-level radioactive waste

A technology of high-level radioactive waste and elements, which is applied in the field of reprocessing of high-level radioactive waste in the nuclear industry, to achieve the effect of simple and efficient method, high selectivity and good separation effect

Inactive Publication Date: 2010-04-07
ZHEJIANG UNIV
View PDF1 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, after the nitric acid solution of high-level waste is separated from the minor actinides, it also contains metal elements such as Cs, Sr, Rh, Ru, Pd, and the element Pd must also be sepa

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for separating element Pd from high-level radioactive waste
  • Method for separating element Pd from high-level radioactive waste
  • Method for separating element Pd from high-level radioactive waste

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0031] Example 1 Preparation of adsorbent

[0032] Dissolve 100 grams of 2,6-bis-(5,6-di-n-butyl-1,2,4-triazin-3-yl)-pyridine in 1000 mL of dichloromethane and mix well; add 300 grams of coating to polymerize Macroporous SiO 2 (SiO 2 -P) Stir evenly to evaporate most of the dichloromethane until the material is nearly dry, and then dry the material in the nearly dry state in vacuum at 45°C for 24 hours.

Example Embodiment

[0033] Example 2 Preparation of adsorbent

[0034] Dissolve 100 grams of 2,6-bis-(5,6-dimethyl-1,2,4-triazin-3-yl)-pyridine in 1500 mL of dichloromethane and mix well; add 600 grams of coating polymer Macroporous SiO 2 (SiO 2 -P) Stir evenly to evaporate most of the dichloromethane until the material is nearly dry, and then dry the material in the nearly dry state in vacuum at 45°C for 24 hours.

Example Embodiment

[0035] Example 3 Preparation of adsorbent

[0036] Dissolve 100 grams of 2,6-bis-(5,6-diethyl-1,2,4-triazin-3-yl)-pyridine in 3000 mL of dichloromethane and mix well; add 1500 grams of coating polymer Macroporous SiO 2 (SiO 2 -P) Stir evenly to evaporate most of the dichloromethane until the material is nearly dry, and then dry the material in the nearly dry state under vacuum at 45°C for 24 hours.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a method for separating an element Pd from the high-level radioactive waste, which comprises the following steps: (1) adding concentrated nitric acid in nitrate solution of the high-level radioactive waste which separates minor actinides for adjusting the concentration of the nitric acid to 1.7-2.3 mol/L; (2) leading the nitrate solution of the high-level radioactive waste after the adjustment of the concentration of the nitric acid to pass through a column filled with an absorbent, and leading the element Pd to be absorbed by the column filled with the absorbent; and (3) using nitric acid water solution of thiourea to elute the column filled with the element Pd, and eluting out the element Pd in the form of nitrate, wherein the concentration of the thiourea in the nitric acid water solution of the thiourea is 0.1-0.3 mol/L, and the concentration of the nitric acid is 0.05-0.15 mol/L. The method is simple and high-efficient, the selectivity of the column is high, and the separation effect is good.

Description

technical field [0001] The invention relates to the field of reprocessing of high-level radioactive waste in the nuclear industry, in particular to a method for separating element Pd from high-level radioactive waste. 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. According to the national atomic energy development policy, rational and effective use 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 guidelines. [0003] Spent fuel contains fragmentation products (FP) such as exothermic elements and long-lived (millions of years) minor actinides (MA). All FP elements go into the HLLW. For long-lived MA, separation / transmutation technology has been proposed and some extracti...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): B01D15/00B01J20/285G21F9/12
Inventor 张安运
Owner ZHEJIANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap