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Extracting agent for extracting strontium from high-level liquid wastes and method for extracting strontium

A technology of high-level waste liquid and extractant, which is applied in the field of extracting strontium from high-level waste liquid and extracting strontium, can solve the problems of low comprehensive performance and short board performance of extractant, and achieve good selectivity and excellent quality. The effect of strong solubility and extraction ability

Inactive Publication Date: 2018-10-02
CHINA INSTITUTE OF ATOMIC ENERGY
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Problems solved by technology

[0005] In order to solve the current low overall performance of the extraction agent for extracting strontium from high-level radioactive waste liquid, and each extractant has obvious performance shortcomings, the present invention provides an extraction method for extracting strontium from high-level radioactive waste liquid Agent and method for extracting strontium

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  • Extracting agent for extracting strontium from high-level liquid wastes and method for extracting strontium
  • Extracting agent for extracting strontium from high-level liquid wastes and method for extracting strontium
  • Extracting agent for extracting strontium from high-level liquid wastes and method for extracting strontium

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[0019] The technical solutions of the present invention will be further specifically described below through examples. In the following detailed description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the invention. It may be evident, however, that one or more embodiments may be practiced without these specific details.

[0020] The extractant of the present invention belongs to the asymmetric amide pod ether compound, and the selection of the number of R1 carbon atoms is beneficial to ensure the extraction capacity. The choice of R2 carbon number is beneficial to control the viscosity of the extraction system, the phase separation is faster in the extraction process, and at the same time avoid three phases in the extraction process.

[0021] According to the extraction performance research of the extractant of the present invention to strontium, it can be known that: one, the distrib...

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Abstract

The invention provides an extracting agent for extracting strontium from high-level liquid wastes and a method for extracting strontium. The structure of the extracting agent is FORMULA, wherein R1 and R2 are alkyls; the carbon number of R1 is 6-8; and the carbon number of R2 is 10-12. The method for extracting strontium from the high-level liquid wastes comprises the following steps: (1) extracting agent-kerosene solution is prepared as an extracting system; (2) oxalic acid and HEDTA are added in the high-level liquid wastes; and the acidity of the high-level liquid wastes is adjusted; and (3) strontium is extracted from the high-level liquid wastes by adopting the extracting system.

Description

technical field [0001] The invention belongs to the field of nuclear fuel reprocessing, and in particular relates to an extraction agent for extracting strontium from high-level radioactive waste liquid and a method for extracting strontium. Background technique [0002] There are more than 60 kinds of elements in the spent fuel, U and Pu can be extracted through the Purex process, and the rest of the elements mainly enter the high-level waste liquid. High-level waste liquid contains a certain amount of Sr-90, and it is of great significance to separate Sr-90. On the one hand, Sr-90 can be used as a raw material for the production of isotope batteries; on the other hand, extracting Sr-90 can reduce high-level waste Nuclides with high heat release in the liquid, thereby effectively reducing the volume of the glass solidified body. [0003] There are many methods for extracting strontium in high-level radioactive waste, including precipitation, ion exchange, membrane separati...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B3/26C22B26/20
CPCC22B26/20C22B3/302Y02P10/20
Inventor 何喜红曹智苏哲袁洁琼谢书宝张虎叶国安
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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