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Strontium extracting method

An extraction and extraction agent technology, applied in the field of strontium extraction, can solve the problems of unsatisfactory diluents and the like, and achieve the effects of low cost, easy availability of raw materials and simple operation

Inactive Publication Date: 2019-04-16
LANZHOU UNIVERSITY
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Problems solved by technology

Therefore, in the process of treating radioactive waste liquid containing Sr(II), whether the extractant can also be used to achieve simple, fast and cost-effective selective separation of the target ion Sr(II) in the aqueous phase is of great practical significance. Yes, in addition, 1,2-dichloroethane is not ideal as a diluent, and further research is needed

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Embodiment Construction

[0014] The present invention will be further described in detail below in conjunction with specific embodiments.

[0015] 1. Experimental reagents

[0016] Table 1 Experimental Reagents

[0017]

[0018] Table 2 Experimental Instruments

[0019]

[0020] 2. Synthesis of extractant

[0021] Take a 100mL three-neck flask and add 3.3425g (20mmol) 2,6-pyridinedicarboxylic acid solid white powder into it, then add 16.00mL pyridine into the flask, put in a stirring magnet, set up the condensation reflux device, and insert Thermometer, add 4.2860g (40mmol) p-toluamide powder to the right port, immerse the flask in kerosene, and add pyridine once to prevent stirring. Heat the kerosene with an electric furnace to raise the temperature, and when the temperature indicator in the flask reaches 40°C, add 6.00 mL (20 mmol) of triphenyl sulfite from the right port of the flask. Continue heating until the temperature indicator is 75°C. During this process, there will be white agglom...

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Abstract

The invention relates to a strontium extracting method. N,N'-di-p-tolylpyridine-2,6-dicarboxamide is synthesized to be used as an extraction agent to extract the strontium in a solution, and an organic phase is extracted. The strontium extracting method is characterized in that in the back extraction process of the strontium in the organic phase, water is used as a back extraction agent, the waterphase is extracted finally, and then the strontium is obtained. On one hand, the extraction agent prepared in the strontium extracting method is pure, free of phosphorus and other secondary pollutants, good in extraction effect and mature in synthesis technology; on the other hand, since deionized water is used as the back extraction agent, the raw material is easy to obtain, operation is easy, cost is low, the back extraction effect is good, and simple, rapid, efficient selective separation of the target Sr ions can be achieved.

Description

technical field [0001] The invention relates to a method for extracting strontium, in particular to a method for extracting strontium in a solution through N,N-di-p-tolyl-2,6-pyridinedicarboxamide, and using water as a stripping agent to finally obtain strontium method. Background technique [0002] Metal ions and radioactive metal ions are increasingly polluting water bodies. The main methods for removing radionuclides from water samples include extraction, precipitation / co-precipitation, ion exchange, membrane separation, electrodeposition, reverse osmosis, adsorption, etc. Scholars such as Hu Peizhuo and Qian Lijuan studied a study titled Solvent extraction of uranium(VI) and thorium(IV) by N,N'-di-p-tolylpyridine-2,6-dicarboxamide from nitric acid solution, and disclosed a A method for the extraction of uranium and thorium by N,N-di-p-tolyl-2,6-pyridinedicarboxamide using 1,2-dichloroethane as a diluent. Therefore, in the process of treating radioactive waste liquid c...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B26/20C22B3/32
CPCC22B26/20C22B3/32Y02P10/20
Inventor 胡佩卓钱丽娟刘延琦南矞单强
Owner LANZHOU UNIVERSITY
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