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Extraction tank ( Mixer settler) The extraction separation of zirconium and hafnium

by:Deyuan      2020-08-17
Zirconium and hafnium separation can adopt many methods, on the industry at present mainly adopts extraction tank ( Mixer settler) Zirconium extraction separation hafnium and high temperature separation method, two methods of the former Soviet union in the 1950 s had been used zirconium fluoride acid potassium distribution of crystallization and ion exchange method to separate zirconium and hafnium. But so far has been the agent by the former two methods, mainly in the solvent extraction using tributyl phosphate, methyl isobutyl ketone, fatty amine extractant using extraction tank ( Mixer settler) The extraction separation of zirconium and hafnium.
three butyl ester extraction ability of zirconium phosphate is greater than the hafnium, with the increase of concentration of HNO3, zirconium, hafnium distribution coefficient increases, and their separation factor.
methyl isobutyl ketone priority extraction hafnium, hafnium zirconium content in the raw material is only 2%, thus is advantageous to the simplified separation process and reduce the dosage of organic phase and the extraction agent.
as a result of tributyl phosphate, methyl isobutyl ketone using extraction tank ( Mixer settler) Extraction separation of zirconium and hafnium are the main disadvantages of environmental pollution, to avoid this, has been developed in sulfuric acid solution extraction separation of zirconium and hafnium new technological process of extracting agent used for fatty amines, fatty amine of viscosity is larger, the application need diluted with kerosene, using fatty alcohol as a modifier, to improve the split phase and prevent the formation of the third phase.
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