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Compound ferrous iron cyanide titanium potassium magnetic ball and preparation method thereof

A technology of titanium potassium ferrocyanide and compound ferrous, applied in chemical instruments and methods, inorganic chemistry, silicon compounds, etc., can solve the problems of difficult recovery and high mechanical strength, and achieve easy recovery, simple steps and high adsorption capacity big effect

Active Publication Date: 2012-11-28
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The spherical potassium titanium ferrocyanide synthesized by Xu Shiping by sol-gel method is a dark brown spherical particle, which has high mechanical strength, good fluidity and uniform particles, but there is a problem that it is not easy to recycle (Xu Shiping, Zhang Jirong, Song Chongli

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) Add ferric iron tetroxide with a particle size of 0.3 μm to 0.8 μm in a beaker, use polyethylene glycol as a dispersant, and disperse and dissolve it in an ethanol solution with a mass fraction of polyethylene glycol of 1%; Fraction is 25% ammonia water as precipitant, slowly add the mixed solution of ethyl orthosilicate and ethanol, wherein the mass ratio of each material is: ferric oxide: ammonia water: ethyl orthosilicate: ethanol=1:4: 3:150, strong mechanical stirring reaction; reaction for 2 hours, after magnetic separation, water washing to neutrality and drying, to obtain magnetic ferric iron tetroxide-silicon dioxide microspheres, and the particle size is 40 μm after particle size analysis;

[0022] (2) In a beaker, take a certain amount of magnetic ferric iron tetroxide-silica microspheres prepared in step (1), stir and disperse them in kerosene with a mass fraction of 5% span-80, and magnetically The solid-liquid mass ratio of ferric-silica microspheres to...

Embodiment 2

[0026](1) Add iron ferric oxide with a particle size of 0.3 μm to 0.8 μm in a beaker, use polyethylene glycol as a dispersant, and disperse and dissolve it in an ethanol solution with a mass fraction of polyethylene glycol of 10%; Fraction is 25% ammonia water as precipitant, slowly add the mixed solution of ethyl orthosilicate and ethanol, wherein the mass ratio of each material is: ferric oxide: ammonia water: ethyl orthosilicate: ethanol=1:4: 3:200, strong mechanical stirring reaction; reaction for 2 hours, after magnetic separation, water washing to neutrality and drying, to obtain magnetic ferric iron tetroxide-silicon dioxide microspheres, and the particle size is 35 μm through particle size analysis;

[0027] (2) In a beaker, take a certain amount of magnetic ferric iron tetroxide-silicon dioxide microspheres prepared in step (1), stir and disperse them in kerosene with a mass fraction of 10% span-80, and magnetically The solid-liquid mass ratio of ferric-silica microsp...

Embodiment 3

[0031] (1) Add ferric iron tetroxide with a particle size of 0.3 μm to 0.8 μm in a beaker, use polyethylene glycol as a dispersant, and disperse and dissolve it in an ethanol solution with a mass fraction of polyethylene glycol of 8%; Fraction is 25% ammonia water as precipitant, slowly add the mixed solution of ethyl orthosilicate and ethanol, wherein the mass ratio of each material is: ferric oxide: ammonia water: ethyl orthosilicate: ethanol=1:4: 3:300, strong mechanical stirring reaction; reaction for 5 hours, after magnetic separation, water washing to neutrality and drying, to obtain magnetic ferroferric oxide-silicon dioxide microspheres, and the particle size is 10 μm through particle size analysis;

[0032] (2) In a beaker, take a certain amount of magnetic ferric iron tetroxide-silica microspheres prepared in step (1), stir and disperse them in kerosene with a mass fraction of 15% span-80, and magnetically The solid-liquid mass ratio of ferric-silica microspheres to ...

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Abstract

The invention belongs to the technical field of a method for preparing a compound ferrous iron cyanide titanium potassium magnetic ball, and in particular relates to the compound ferrous iron cyanide titanium potassium magnetic ball and a preparation method thereof. The method comprises the following steps of: preparing a magnetic ferroferric oxide silicon dioxide microballoon by using a ferroferric oxide magnetic particle with the grain diameter of 0.3-0.8 microns as a core and using tetraethoxysilane as a silicon source; then preparing a magnetic ferroferric oxide silicon dioxide-titanium oxide spherical particle by taking dichloro oxotitanium as a titanium source; and finally, preparing the compound ferrous iron cyanide titanium potassium magnetic ball by using potassium ferrocyanide as a soaking agent. The method has simple steps and is mild in experiment condition; and the grain diameter of the prepared compound ferrous iron cyanide titanium potassium magnetic ball is 0.05-0.2mm, the saturation capacity of absorbed cesium is 1.0 mmolCs / g-1.4 mmolCs / g dry compound particles; and therefore, the method for preparing the compound ferrous iron cyanide titanium potassium magnetic ball has the advantages that the absorption capacity of the ferrous iron cyanide titanium potassium to the cesium is preserved under the mild condition, the analysis is difficult to carry out, and the absorbed particles are easy to recover; and particulate matter of the absorbed cesium can be transformed to oxide to be conveniently stored.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of composite magnetic materials, and in particular relates to a composite titanium potassium ferrocyanide magnetic ball and a preparation method thereof. Background technique [0002] With the development of nuclear power industry, radioactive waste liquid is more and more harmful to the environment. Many radionuclides will migrate to aquatic organisms and various crops in water and soil, thus causing great harm to human survival. Therefore, The safe disposal of radioactive element waste liquid is very important. Cesium (Cs) is a highly pyrogenic fission product with a long half-life. Its removal and recovery research has always been valued by countries all over the world, especially the Fukushima incident in Japan in 2011, which has aroused people's heightened awareness of the safe disposal of radioactive waste liquid. focus on. [0003] The treatment of cesium is mainly the ion exc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/10B01J20/30
Inventor 文明芬陈靖王建晨
Owner TSINGHUA UNIV
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