Amidoxime-based super-crosslinked microporous resin efficient uranium adsorbent and preparation method thereof

A microporous resin and amidoxime-based technology, which is applied in the field of amidoxime-based super-crosslinked microporous resin uranium adsorbent and its preparation, can solve the problems of low adsorption rate and saturated adsorption capacity, and achieve excellent adsorption capacity , high specific adsorption performance, high selectivity effect

Inactive Publication Date: 2020-07-24
HARBIN ENG UNIV
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  • Abstract
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of low adsorption rate, saturated adsorption capacity and low adsorption rate of the existing amidoxime-based adsorption resin used to extract uranium, and propose a kind of amidoxime-based super-crosslinked microporous resin Efficient uranium adsorbent and preparation method

Method used

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  • Amidoxime-based super-crosslinked microporous resin efficient uranium adsorbent and preparation method thereof
  • Amidoxime-based super-crosslinked microporous resin efficient uranium adsorbent and preparation method thereof
  • Amidoxime-based super-crosslinked microporous resin efficient uranium adsorbent and preparation method thereof

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specific Embodiment approach 1

[0021] Specific implementation mode 1: The structural formula of the amidoxime-based super-crosslinked microporous resin high-efficiency uranium adsorbent in this embodiment is:

[0022]

[0023] The adsorbent obtained in this embodiment combines the advantages of organic porous micromaterials and the excellent adsorption capacity of amidoxime functional groups for uranium, and has high adsorption rate, saturated adsorption capacity, adsorption rate and uranium ion selectivity. The uranium adsorbent has a significant effect on the concentration C 0 The adsorption rate of uranium ions in the uranium solution of =100ppm and pH=6 can reach more than 90%. Due to the specific recognition and adsorption of amidoxime groups on uranium ions, under the condition of 30°C, the saturated adsorption capacity of the uranium adsorbent is 20 times that of the microporous resin without amidoxime. Due to the existence of a large number of micropores in the uranium adsorbent, the uranium ion...

specific Embodiment approach 2

[0024] Specific embodiment two: the preparation method of amidoxime-based hypercrosslinked microporous resin high-efficiency uranium adsorbent in this embodiment is carried out according to the following steps:

[0025] One, take styrene and divinylbenzene as raw material synthesis polystyrene-divinylbenzene copolymer as resin matrix; Select polystyrene-divinylbenzene copolymer as resin matrix, this matrix contains a large amount of benzene rings, is follow-up The hypercrosslinking reaction provides the basis, and the matrix has good thermodynamic and chemical stability, which enables the material to maintain stable performance under harsh seawater conditions.

[0026] 2. Chloromethylate the resin matrix obtained in step 1 to obtain chloromethylated resin; methyl chloride is a lively functional group, which is easy to leave, making methylene participate in various chemical reactions, such as electrophilic substitution reaction, hydrophilic Nuclear substitution reaction, etc., ...

specific Embodiment approach 3

[0031] Specific embodiment three: different from specific embodiment two: the synthetic method of polystyrene-divinylbenzene copolymer described in step one is: add styrene and divinylbenzene in the container, then add initiator and anhydrous Ethanol, react at 60-80°C for 10-24h, cool to room temperature, filter, extract and vacuum-dry the resulting polymer in sequence to obtain a polystyrene-divinylbenzene copolymer.

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Abstract

The invention discloses an amidoxime-based super-crosslinked microporous resin efficient uranium adsorbent and a preparation method thereof, relates to an amidoxime-based super-crosslinked microporousresin uranium adsorbent and a preparation method thereof, and aims to solve the problems of low adsorption rate, saturated adsorption capacity and adsorption rate of the existing adsorption resin with amidoxime groups for extracting uranium. The preparation method comprises the following steps: synthesizing a polystyrene-divinylbenzene copolymer by taking styrene and divinylbenzene as raw materials, taking the polystyrene-divinylbenzene copolymer as a resin matrix, and carrying out chloromethylation, cyanation, super-crosslinking and amidoximation on the resin matrix at one time to obtain theadsorbent. The adsorbent integrates the advantages of an organic porous micro-material and the excellent adsorption capacity of amidoxime functional groups to uranium and has relatively high adsorption rate, saturated adsorption capacity, adsorption rate and uranium ion selectivity. The method is suitable for preparing the uranium adsorbent.

Description

technical field [0001] The invention relates to a uranium adsorbent material and a preparation method thereof, in particular to an amidoxime-based hypercrosslinked microporous resin uranium adsorbent and a preparation method thereof. Background technique [0002] With the continuous growth of global energy demand and the rapid development of the nuclear industry, the application of radioisotopes in the nuclear industry and the nuclear fuel cycle will produce a large amount of uranium-containing radioactive wastewater. The uranium in these wastewater can enter the human body and organisms through the ecological cycle. , has caused a serious threat to the ecological environment and human health, so it is of great significance to enrich and separate uranium from wastewater. In addition, as the demand for uranium resources increases, traditional uranium mining can no longer meet the needs of social development for uranium. There are more than 4.5 billion tons of uranium resource...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F103/08
CPCB01J20/267C02F1/285C02F2101/006C02F2103/08
Inventor 白建伟马小飞闫慧君王君
Owner HARBIN ENG UNIV
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