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Extraction agent and adsorbent containing effective functional groups and application of extraction agent and adsorbent containing effective functional groups in extraction purification of thorium metal

A technology of extractant and adsorbent, which is applied in the field of extraction and separation of radioactive elements, and can solve the problems that cannot be completely removed

Active Publication Date: 2018-12-25
中科新镧系(厦门)科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention proposes to solve the problem that radioactive metal elements and general metal elements cannot be completely removed in the process of separating and purifying rare earth elements from rare earth ores (such as monazite, bastnaesite, etc.), designs and develops compounds containing effective functional groups, and applies In liquid-liquid extraction (extractant) and solid-liquid extraction (adsorbent material), it can effectively remove radioactive metal elements in rare earth elements

Method used

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  • Extraction agent and adsorbent containing effective functional groups and application of extraction agent and adsorbent containing effective functional groups in extraction purification of thorium metal
  • Extraction agent and adsorbent containing effective functional groups and application of extraction agent and adsorbent containing effective functional groups in extraction purification of thorium metal
  • Extraction agent and adsorbent containing effective functional groups and application of extraction agent and adsorbent containing effective functional groups in extraction purification of thorium metal

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preparation example Construction

[0071] The present invention also provides the preparation method of above-mentioned extractant, according to the type difference of extractant, the preparation method of described extractant is as follows:

[0072] In a preferred embodiment of the present invention, the extractant (E1 ) and (E 2 ) preparation method comprises the steps:

[0073] Compound shown in formula (IV) and R 1 R 2 NH is a raw material, and at a certain temperature, reacts to prepare an extractant (E 1 ) or (E 2 );

[0074]

[0075] Among them, X 1 , R 1 , R 2 is defined as above.

[0076] In a preferred embodiment of the present invention, the extractant (E 1 ) and (E 2 ) preparation method specifically comprises the steps:

[0077] 1) compound shown in formula (IV) and R respectively 1 R 2 NH is dissolved in an organic solvent, where, X 1 , R 1 , R 2 as defined above;

[0078] 2) The above two solutions are mixed and reacted to prepare the extractant (E 1 ) or (E 2 ).

[0079] W...

Embodiment 1

[0162] Embodiment 1 extractant (E 1-1 ) Synthesis of -1

[0163] Weigh 1.52g (13.1mmol) diglycolic anhydride and 2.87g (11.9mmol) R 1 R 2 NH(R 1 , R 2 selected from isooctyl), which were dissolved in 20mL of dichloromethane organic solvent respectively; the two solutions were mixed and reacted at 25°C; during the reaction, the mixed solution gradually became clear, and when it was completely clear, the reaction Complete (about reaction 12h), make extraction agent shown in formula (I) (wherein, X 1 for -O-, R 1 and R 2 The same is isooctyl); the prepared extractant is washed with high-purity deionized water to remove impurities, and then magnesium sulfate is added to the washed product to filter to obtain a water-free product, and the processed product is rotated The organic solvent was removed by evaporating and condensing apparatus, and then dried in a vacuum oven at 75°C for 12 hours, so as to obtain a high-purity extractant. Wash the prepared extractant several time...

Embodiment 2

[0165] Embodiment 2 extractant (E 1-2 ) Synthesis of -2

[0166] Weigh 3.78g (28.2mmol) of diglycolic acid and dissolve in 20ml of acetic anhydride, heat to 140°C on a magnetic heating stirrer and stir to reflux. During the reaction, the solid gradually dissolves and the solution gradually becomes clear, and stops after 4 hours For the reaction, excess acetic anhydride and acetic acid formed by the reaction were removed by a rotary evaporator condenser, and placed in a vacuum oven at 80°C for 24 hours, and the product was diglycolic anhydride. The yield was 93%.

[0167] The above diglycolic anhydride and 2.87g (11.9mmol) R 1 R 2 NH(R 1 , R 2 selected from isooctyl), which were dissolved in 20mL of dichloromethane organic solvent respectively; the two solutions were mixed and reacted at 25°C; during the reaction, the mixed solution gradually became clear, and when it was completely clear, the reaction Complete (about reaction 12h), make extraction agent shown in formula (I...

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Abstract

The invention discloses an extraction agent, adsorbent and impregnation type adsorbing material. By using the separation characteristic of the extraction agent, adsorbent and impregnation type adsorbing material, the extraction purification (removal) process of radioactive metallic elements is developed for separation and refinement of target metals. In an extraction agent, the load rate and hydrophobicity of the extraction agent in organic solvents are improved according to different selected alkyl chains, because of the stability of the chemical structure, the reusability of the extraction agent is promoted correspondingly, and the environment is protected. The separation and purification of the radioactive metallic elements, the radioactive metallic elements and general metallic elements and the radioactive metallic elements and rare earth metallic elements can be realized by controlling different separation characteristics of metals under different pH conditions, and the extractionpurification process has significant valve in the industry.

Description

technical field [0001] The invention belongs to the technical field of extraction and separation of radioactive elements, and in particular relates to an extraction agent and an adsorbent containing effective functional groups and their application in the extraction and separation of thorium metal. Background technique [0002] China's rare earth resources are not only rich in reserves, but also have a complete range of minerals and rare earth elements, and the distribution is relatively concentrated, such as iron-niobium-rare earth ore, bastnaesite, monazite, etc. However, rare earth elements often coexist or accompany radioactive elements such as thorium (Th) and uranium (U) in rare earth ores. Therefore, there are hazards such as radiation pollution and environmental pollution in the production process of rare earth metal smelting and waste storage. [0003] In modern society, rare earth metals are used in various fields such as military affairs, chemical industry, metall...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22B60/02C22B3/32
CPCC22B60/0291C22B3/32
Inventor 赵志钢杨帆
Owner 中科新镧系(厦门)科技有限公司
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