Application and method for extracting and separating uranium with amino-containing neutral phosphine extracting agent

An extraction agent, neutral phosphine technology, applied in the field of amino-containing neutral phosphine extraction agent, extraction and separation of uranium, can solve problems such as poor separation performance
CN106521153AActive Publication Date: 2017-03-22CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
Publication Date
2017-03-22

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Abstract

The invention relates to an application and method for extracting and separating uranium with an amino-containing neutral phosphine extracting agent. The formula is shown in the specification, wherein R1 and R2 are independently selected from C1-12 alkyl, R3 and R4 are independently selected from C1-5 alkyl and hydrogen, R5 and R6 are independently selected from C1-16 alkyl and hydrogen, and at most one of R5 and R6 is hydrogen. The amino-containing neutral phosphine extracting agent has good extracting and separating capacity to uranium in different acid media, the synthesis method is simple, chemical raw materials used for synthesis are simple and easy to obtain, cost is low, therefore, the extracting and separating cost of cerium can be effectively reduced, and high industrial application value is achieved. According to the method, liquid-liquid extraction and separation or solid-liquid extraction and separation is carried out on uranium in uranium-containing raw materials, the result shows that the purity of uranium obtained after extraction, washing and reextraction is 99% or above and the yield of uranium is 98% or above, and enrichment and purification of uranium are effectively achieved.
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Description

technical field

[0001] The invention belongs to the technical field of uranium hydrometallurgy, and specifically relates to the use and method of an amino-containing neutral phosphine extractant for extracting and separating uranium. Background technique

[0002] At present, the extraction of uranium in nitric acid medium mainly adopts TBP process. The TBP process is a method of extracting and separating uranium, thorium and rare earths in the solution by using tributyl phosphate as the extraction agent. Due to the high separation coefficient of TBP for impurities such as uranium and thorium and rare earth, this process is widely used in the field of hydrometallurgy technology. However, the extraction agent TBP has a large water solubility and is limited to a good separation ability of uranium and thorium in the nitric acid system, which limits its popularization and application.

[0003] Monazite is a valuable resource rich in rare earth, thorium and uranium. The radioac...

Claims

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