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Thiele acid uranyl complex, preparation method thereof and Thiele acid application

A technology for uranyl and uranyl complexes of Thiele acid is applied in the field of chemical synthesis, which can solve the problems of less choice of post-processing extractants, and achieve the effects of simple and practical preparation method, high reaction efficiency and strong coordination ability.

Active Publication Date: 2016-07-20
INST OF HIGH ENERGY PHYSICS CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Existing extraction agents for uranium nuclear fuel reprocessing are relatively few and have various limitations

Method used

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  • Thiele acid uranyl complex, preparation method thereof and Thiele acid application
  • Thiele acid uranyl complex, preparation method thereof and Thiele acid application
  • Thiele acid uranyl complex, preparation method thereof and Thiele acid application

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preparation example Construction

[0020] The present invention provides a kind of preparation method of Thier's acid uranyl complex, comprising the following steps:

[0021] Using Thiele, Thiele's acid and uranyl nitrate as raw materials, Thiele's acid uranyl complexes were synthesized under weak alkaline conditions by hydrothermal method.

[0022] Preferred technical scheme of the present invention, a kind of preparation method of Thier's acid uranyl complex comprises the following steps:

[0023] (1) Add sodium bicarbonate to react in the aqueous suspension of Thiele acid, then be heated to the first preset temperature, until all the solids are dissolved;

[0024] (2) Add uranyl nitrate to the above solution, seal the reaction vessel, react at a second preset temperature, and stir to produce precipitation;

[0025] (3) The precipitate is collected, washed with water, and then air-dried to obtain a uranyl complex.

[0026] In the present invention, the organic acid Thiele acid is selected as the uranyl liga...

Embodiment 1

[0039] A kind of preparation method of Thier's acid uranyl complex comprises the following steps:

[0040] (1) Add 0.220 g, 1.0 mmol Thiele acid to 20 mL water to form a suspension. 0.168 g, 2.0 mmol of sodium bicarbonate was added to the above aqueous suspension, and the reaction mixture was heated at 55° C., gas was generated. After 2 hours, all solids were dissolved and no gas was generated.

[0041] (2) Add 0.502 g, 1.0 mmol uranyl nitrate hexahydrate to the above solution, and seal the reaction tube. The reaction was stirred at 110°C for 4 days, producing a large brown precipitate. The above-mentioned precipitate was collected and fully washed with water (10mL×6 times), and then air-dried, that is, placed on the test bench for 1-2 days, and dried naturally to obtain 0.457g product with a yield of 93%. Its structure was confirmed by infrared and mass spectrometry. Spectra are confirmed.

[0042] see figure 1 , the infrared spectrogram was obtained by the infrared spect...

Embodiment 2

[0051] Using the same method as in Example 1, the difference is: in the aqueous suspension: the ratio of Thiele acid to water is 0.20g Thiele acid / 100mL water; the mass ratio of sodium bicarbonate to Thiele acid is 1:2.0.

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Abstract

The invention discloses a Thiele acid uranyl complex, a preparation method thereof and Thiele acid application.The preparation method comprises the following steps that Thiele, Thiele acid and uranyl nitrate are used as raw materials, and the Thiele acid uranyl complex is synthesized through a hydrothermal method.The invention further provides a uranyl complex.The uranyl complex is prepared according to the preparation method.The Thiele acid uranyl complex is successfully synthesized through the hydrothermal method.In the preparation process of the complex, the preparation method is easy, convenient and practical, and the reaction efficiency is high.The product structure is determined through infrared and mass spectrograms, which further illustrates that Thiele acid has the strong complexing ability for uranyl and has the potential of becoming a uranium extraction agent.

Description

technical field [0001] The application belongs to the field of chemical synthesis, and specifically relates to a preparation method of thier's acid uranyl complex and the use of thier's acid. Background technique [0002] In the peaceful use of nuclear energy, a considerable amount of radioactive waste is produced, in which unreacted uranium (including uranium-238 and uranium-238) accounts for most of the total weight of spent fuel. How to deal with these uranium wastes is an important research direction of environmental radiochemistry. Research on uranium treatment at home and abroad mainly focuses on the adsorption of uranyl on minerals or other synthetic materials, or the coordination of uranyl in aqueous solution systems. Organic ligands designed for complexes. At present, the commonly used extraction agent for nuclear fuel reprocessing is tributyl phosphate (TBP). In order to overcome its shortcomings such as poor radiation resistance, it has become the focus of resea...

Claims

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Application Information

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IPC IPC(8): C07F5/00C22B60/02C22B3/32
CPCC07F5/003C22B60/02C22B60/026C22B60/0291C22B60/0295C22B3/324
Inventor 张延华刘宇汪建军薛井泉杨文江韩维伟
Owner INST OF HIGH ENERGY PHYSICS CHINESE ACADEMY OF SCI
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