Porous structural elastic composite material for extracting uranium from seawater and preparation method

An elastic composite material and porous structure technology, which is applied in seawater treatment, chemical instruments and methods, and other chemical processes, can solve the problems of impossibility and low adsorption rate of adsorption materials, achieve simple process, excellent mechanical properties, and improve material flexibility Effect

Inactive Publication Date: 2018-09-28
HAINAN UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of this, the present invention proposes a porous structure elastic composite material for extracting uranium from seawater and its preparation method, which solves the problem that the adsorption material in the prior art has a low adsorption rate and cannot be used repeatedly for a long time

Method used

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  • Porous structural elastic composite material for extracting uranium from seawater and preparation method
  • Porous structural elastic composite material for extracting uranium from seawater and preparation method
  • Porous structural elastic composite material for extracting uranium from seawater and preparation method

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preparation example Construction

[0033] The present invention proposes a method for preparing a porous structure elastic composite material for extracting uranium from seawater, comprising the following steps:

[0034] (1) Calculated by weight ratio, add 8 to 20 parts of hydroxylamine hydrochloride into a flask containing 500 parts of DMF or DMSO or DMAC, stir until completely dissolved, then add 3 to 15 parts of basic solid powder, preferably vigorously stirred at room temperature 0.5 to 2 hours, then add 5 to 25 parts of polyacrylonitrile raw material powder, after sealing, preferably stir and react in a constant temperature environment of 60 to 90 ° C for 6 to 48 hours, after cooling, centrifuge to remove solid insolubles, and collect the gemstone in the supernatant DMF or DMSO or DMAC solution of amidoximated polyacrylonitrile; during this step, the alkaline solid powder can be sodium hydroxide, sodium carbonate, potassium hydroxide or sodium bicarbonate, etc. to adjust the pH value.

[0035] (2) heating ...

Embodiment 1

[0044] A method for preparing a porous structure elastic composite material for extracting uranium from seawater, comprising the following steps:

[0045] (1) Add 8g of hydroxylamine hydrochloride to the flask containing 500g of DMF, preferably magnetic stirring, until fully dissolved, then add 3g of sodium hydroxide powder, stir vigorously at room temperature for 30 minutes, then add 5g of polyacrylonitrile raw material powder, seal and place in Stir and react in a constant temperature environment of 60°C for 48 hours, after cooling, centrifuge at a speed of 30,000r / min to remove solid insoluble matter, and collect the DMF solution of amidoximated polyacrylonitrile in the supernatant.

[0046] (2) The DMF solution of amidoximated polyacrylonitrile is miscible with aqueous sodium hydroxide solution and kept heating and stirring until completely dissolved into a clear homogeneous solution, wherein the DMF solution of amidoximated polyacrylonitrile The mass concentration is 0.5%, ...

Embodiment 2

[0054] A method for preparing a porous structure elastic composite material for extracting uranium from seawater, comprising the following steps:

[0055] (1) Add 15g of hydroxylamine hydrochloride into a flask containing 500g of DMF, stir magnetically until completely dissolved, then add 10g of potassium hydroxide powder, stir vigorously at room temperature for 40 minutes, then add 18g of polyacrylonitrile raw material powder, seal it at 75 Stir and react in a constant temperature environment at ℃ for 24 hours. After cooling, centrifuge at a speed of 20,000 r / min to remove solid insoluble matter, and collect the DMF solution of amidoximated polyacrylonitrile in the supernatant.

[0056] (2) The DMF solution of the amidoximated polyacrylonitrile of equal volume is miscible with potassium hydroxide aqueous solution and keeps heating and stirring to dissolve into a clear homogeneous solution, and the mass concentration of the DMF solution of amidoximated polyacrylonitrile is: 5%...

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Abstract

The invention provides a preparation method of a porous structural elastic composite material for extracting uranium from seawater. The preparation method comprises preparing an amidoximated polyacrylonitrile solution, mixing the amidoximated polyacrylonitrile solution and a strong alkali aqueous solution, maintaining heating and stirring until dissolved, adding the stirred solution into an aqueous solution of a polymer material capable of cross-linking gelation, mixing uniformly the solution, immersing a porous structure elastic material into the mixed solution, carrying out vacuum defoaming,carrying out drying, immersing the dried porous structure elastic material in a cross-linking agent solution, carrying out cross-linking gelation and carrying out rinsing with water. The aqueous solution of the polymer material which can be cross-linked and gelled is cross-linked and gelled so that the coating strength of amidoximated polyacrylonitrile on the porous structure elastic material skeleton is improved, the material flexibility, mechanical stability and hydrophily are improved and the high adsorptive porous structural elastic composite material for extracting uranium ions from seawater is obtained.

Description

technical field [0001] The invention relates to the technical field of adsorption materials for extracting uranium from seawater, in particular to a porous structure elastic composite material used for extracting uranium from seawater and a preparation method thereof. Background technique [0002] Uranium is an important energy material, which is of great significance to industry, agriculture, national defense and science and technology. Compared with other marine chemical resources, uranium resources are lower in concentration, more complex in structure, and more difficult to extract. Therefore, the extractant or adsorbent used to extract uranium must have extremely high extraction or adsorption capacity and selectivity for uranium. The economical preparation of high-efficiency, high-selectivity, stable and durable extractant is the key to realize large-scale extraction of uranium from seawater. At present, there are many research methods for recovering uranium, which main...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30B01J20/26C02F1/28C02F103/08
CPCB01J20/267C02F1/285C02F2103/08
Inventor 王东伍晖王宁
Owner HAINAN UNIVERSITY
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