A method for extracting and separating trivalent lanthanide and trivalent actinide ions

An actinide and lanthanide technology, which is applied in the fields of nuclear fuel cycle and waste liquid treatment, can solve the problems of decreased extraction and separation capacity, deviation from the ideal range, changes, etc., and achieves the effect of high-efficiency extraction and separation performance and good application prospects.
CN104894372BActive Publication Date: 2017-05-17TSINGHUA UNIV +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
TSINGHUA UNIV
Publication Date
2017-05-17

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Abstract

The invention relates to a method for extracting and separating trivalent lanthanum and trivalent actinium ions and belongs to the technical field of nuclear fuel circulation and waste liquid treatment. The method uses bis(2,4,4-trimethylpentyl) dithiophosphinic acid as an extracting agent, uses long-chain alkane as a thinning agent and uses a weak acid buffer system to effectively stabilize the pH value of the water phase of an extraction system, pH regulation does not need to be performed to the system during extraction, trivalent actinium elements can be high-selectively extracted and separated out from the water phase, and most of trivalent lanthanum elements are remained in the water phase. The method for extracting and separating trivalent lanthanum and trivalent actinium ions has the advantages that the extraction and separation performance of trivalent lanthanum and trivalent actinium ions is high and stable and the prospect of application in the field of advanced nuclear circulation is better.
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Description

technical field

[0001] The invention relates to a method for extracting and separating trivalent lanthanide and trivalent actinide ions, and belongs to the technical field of nuclear fuel cycle and waste liquid treatment. Background technique

[0002] A large amount of radioactive waste is generated during the nuclear fuel cycle. At present, whether it is the development of nuclear weapons or the application of civilian nuclear energy, a large amount of high-level liquid waste is left over, and its treatment and disposal has become the focus of attention all over the world. The "separation-transmutation" method is an advanced strategy for treating high-level waste liquid, that is, the chemical separation method is used to selectively separate the actinide elements, which account for a small proportion but are highly toxic, from the high-level waste liquid. Accelerators or reactors convert it into stable or short-lived nuclides, and the residual waste liquid becomes non-alph...

Claims

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