Solid-phase extraction agent for selectively separating trivalent minor actinides and trivalent lanthanides, and preparation method and application of same

A solid-phase extraction agent and lanthanide technology, applied in the field of organic compounds and their preparation, can solve the problems of environmental pollution, human harm, volatile diluents, etc., and achieve the effect of simple separation operation

Active Publication Date: 2018-09-11
NAT UNIV OF DEFENSE TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although two (ortho-trifluoromethylphenyl) dithiophosphinic acid can be used at a lower pH value, due to the volatile and certain t

Method used

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  • Solid-phase extraction agent for selectively separating trivalent minor actinides and trivalent lanthanides, and preparation method and application of same
  • Solid-phase extraction agent for selectively separating trivalent minor actinides and trivalent lanthanides, and preparation method and application of same
  • Solid-phase extraction agent for selectively separating trivalent minor actinides and trivalent lanthanides, and preparation method and application of same

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Embodiment 1

[0051] A solid-phase extractant for selectively separating trivalent minor actinides and trivalent lanthanides of the present invention, comprising magnetic mesoporous material Fe 3 o 4 @SiO 2 And dithiophosphinic acid compound, dithiophosphinic acid compound through the coupling agent C 9 h 21 ClO 3 Si grafted on magnetic mesoporous material Fe 3 o 4 @SiO 2 superior.

[0052] Wherein, the dithiophosphinic acid compound is two (2-trifluoromethyl-4-hydroxyl) phenyl dithiophosphinic acid, the structural formula is as formula (1):

[0053]

[0054] Formula (1) The structural formula of bis(2-trifluoromethyl-4-hydroxyl)phenyldithiophosphinic acid.

[0055] The preparation method of the solid-phase extractant of the above-mentioned present embodiment may further comprise the steps:

[0056] (1) Preparation of two (2-trifluoromethyl-4-hydroxy) phenyl dithiophosphinic acid:

[0057] 1.1) Protection of hydroxyl group: 24g (0.1mol) 3-trifluoromethyl-4-bromophenol and 7.48g...

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Abstract

The invention discloses a solid-phase extraction agent for selectively separating trivalent minor actinides and trivalent lanthanides, and a preparation method and an application of same, wherein thesolid-phase extraction agent includes a magnetic mesoporous material and a dithiophosphinic acid compound which is grafted thereto through a coupling agent; the dithiophosphinic acid compound is bis(2-trifluoromethyl-4-hydroxy)phenyldithiophosphinic acid and is represented as the structural formula (1). The preparation method includes steps of: 1) connecting the coupling agent to the magnetic mesoporous material; 2) under an alkaline catalyst, grafting the bis(2-trifluoromethyl-4-hydroxy)phenyldithiophosphinic acid on the magnetic mesoporous material through the coupling agent. The solid-phaseextraction agent can selectively separate the trivalent minor actinides and trivalent lanthanides, is environment-friendly in separation process, and has simple operation.

Description

technical field [0001] The invention relates to the technical field of organic compounds and their preparation, in particular to a solid-phase extractant for selectively separating trivalent minor actinides and trivalent lanthanides, a preparation method and application thereof. Background technique [0002] The effective separation of trivalent minor actinides and trivalent lanthanides is one of the key steps in the "separation-transmutation" of high-level waste liquid, and it is also an effective means for further volume reduction of α-waste. The separation of trivalent minor actinides from trivalent lanthanides has been a challenging problem. A liquid extraction system composed of bis(o-trifluoromethylphenyl)dithiophosphinic acid and diluent toluene or FS-13 (trifluoromethylphenyl sulfone) is effective for Am 3+ Has good extraction ability and high selectivity, Am 3+ with Eu 3+ Separation factors up to ~10 5 , the extraction and separation performance is better than t...

Claims

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Application Information

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IPC IPC(8): C22B3/38C22B59/00C22B60/02C07F9/30
CPCC07F9/304C22B59/00C22B60/02C22B3/385Y02P10/20
Inventor 王芳何香陶呈安王建方邹晓蓉黄坚阳绪衡李玉姣刘卓靓
Owner NAT UNIV OF DEFENSE TECH
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