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Preparation method for synthesizing MIL-53(Al)-AO2 on basis of metal-organic framework of amidoxime

A metal-organic framework and amidoxime technology, which is applied in the field of metal-organic framework synthesis MIL-53-AO2 preparation, can solve the problems of unfavorable uranium extraction and reuse, low selective adsorption capacity, etc., and achieve improved retention and adsorption capacity and efficient materials , the effect of large output

Inactive Publication Date: 2018-09-04
TIANJIN CHENGJIAN UNIV
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Problems solved by technology

However, due to the low selective adsorption capacity of most adsorbents at present, it is not conducive to the extraction and reuse of uranium in wastewater.

Method used

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  • Preparation method for synthesizing MIL-53(Al)-AO2 on basis of metal-organic framework of amidoxime
  • Preparation method for synthesizing MIL-53(Al)-AO2 on basis of metal-organic framework of amidoxime
  • Preparation method for synthesizing MIL-53(Al)-AO2 on basis of metal-organic framework of amidoxime

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Embodiment Construction

[0014] Below in conjunction with specific embodiment the present invention is described in further detail:

[0015] Step S1: with 0.56g of 2-aminoterephthalic acid and 1.125g of Al(NO 3 ) 3 9H 2 O was dissolved in 80mL N-N dimethylformamide DMF and 20mL deionized water mixed liquid, after fully stirring, the mixed liquid was placed in a 200mL polytetrafluoroethylene-lined stainless steel reaction kettle, and the reaction kettle was placed in a vacuum drying oven Adjust the temperature to 150°C and react for 24 hours. After the reaction is over, let it cool down to room temperature naturally, filter it with a polytetrafluoroethylene microporous filter membrane with a pore size of 0.22 μm, and wash it repeatedly with DMF solution to obtain the MIL-53 (Al )-NH 2 mixture A1.

[0016] Step S2: Put the mixture A1 in step S1 in a round-bottomed flask, add DMF again to wash the impurities, heat and reflux with a reflux device to remove the residual 2-aminoterephthalic acid in the ...

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Abstract

The invention discloses a preparation method for synthesizing MIL-53(Al)-AO2 on the basis of a metal-organic framework of amidoxime. The preparation method comprises the following steps: 1, dissolving2-aminaterephthalic acid and Al(NO3)3.9H2O into DMF (Dimethyl Formamide) and deionized water to prepare a MIL-53(Al)-NH2 mixture A1; 2, washing impurities in the A1 with DMF and acrylonitrile so as to obtain a solid product A2; 3, adding the A2 into acrylonitrile and Al Cl3 to be fully dissolved so as to obtain a middle product A3; 4, distributing the A3 into a mixed solution of ultrapure water and ethanol, adding K2CO3 and NH2OH.HCl, and reacting to obtain a mixture A4; 5, washing the A4 with ethanol and ultrapure water, performing suction filtration, separating, and performing vacuum drying, so as to obtain the MIL-53(Al)-AO2. The preparation method disclosed by the invention has the beneficial effects that a preparation method of the MIL-53(Al)-AO2 with advantages of being high in yield, simple in equipment and easy to operate and control is provided; a high-efficiency material is provided for extracting uranium from uranium-bearing water.

Description

technical field [0001] The invention relates to the fields of uranium-containing wastewater and seawater extraction of uranium, in particular to the synthesis of MIL-53(Al)-AO based on amidoxime-based metal-organic frameworks 2 method of preparation. Background technique [0002] With the rapid development of the nuclear power industry and the peaceful use of nuclear energy, a large amount of radioactive waste is produced, which contains different types of radionuclides. In addition, some uranium is inevitably released into the natural environment during the production and processing of nuclear fuel. Contamination of dispersed uranium(VI) in uranium tailings is a worldwide concern. Free uranium (VI) ions can accumulate through the food chain and eventually enter the human circulatory system. Radioactive uranium (Ⅵ) ions can destroy biological tissues of the human body. Removing radionuclides from wastewater and releasing them into the natural environment is critical for ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C02F1/28B01J20/22B01J20/30C02F101/20
CPCB01J20/226C02F1/285C02F2101/006C02F2101/20C08G83/008
Inventor 刘建明刘胜楠刘通李健华刘月明
Owner TIANJIN CHENGJIAN UNIV
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