Tributyl phosphate extraction resin for zirconium-hafnium separation and preparation method thereof

Abstract

The invention relates to tributyl phosphate extraction resin for zirconium-hafnium separation and a preparation method thereof. The preparation method is characterized by comprising the following steps: adding a solvent into a reaction kettle, wherein the solvent is a mixture of water and alcohols and the mixed weight ratio of the water and the alcohols is 100:2-100; after the solvent is stirred evenly, adding resin into the solvent, wherein the weight ratio of the solvent to the resin is 100:5-100; after the mixture is stirred evenly, adding tributyl phosphate into the mixture, wherein the weight ratio of the tributyl phosphate to the resin is 15-400:100; and stirring the mixture for 0.5 to 20 hours at the temperature of between 10 and 100 DEG C, and filtering the mixture to obtain the TBP extraction resin. The TBP-resin prepared by the method serving as the extraction resin for filling an extraction chromatographic column can effectively separate zirconium and hafnium, fully exerts the advantages of a liquid-liquid extraction process such as large TBP extracted zirconium capacity and large zirconium-hafnium separation coefficient, and eliminates the problem of emulsification produced by liquid-liquid extraction so as to successfully implement a zirconium-hafnium TBP extraction separation process.

Description

technical field [0001] The invention relates to a tributyl phosphate leaching resin and a preparation method thereof, in particular to a tributyl phosphate leaching resin for separating zirconium and hafnium and a preparation method thereof. Background technique [0002] In nature, zirconium and hafnium always co-exist together. To obtain atomic-level zirconium and hafnium, only the extraction method can be used to separate zirconium and hafnium. Previously, zirconium and hafnium were extracted and separated by liquid-liquid extraction process of TBP-hydrochloric acid and nitric acid mixed acid system to produce atomic energy grade zirconium oxide and hafnium oxide. The process is characterized by large extraction capacity of the organic phase, high separation coefficient, large capacity of extraction equipment, and qualified atomic energy grade zirconia and hafnium oxide can be obtained at the same time after one separation. But the fatal shortcoming is that the emulsifica...

AI Technical Summary

Problems solved by technology

But the fatal shortcoming is that the emulsification problem cannot be solved during the extraction process. As we all know, emulsification is the enemy in the smooth liquid-liquid extraction process.

Due to the emulsification phenomenon, the two phases to be extracted cannot be effectively separated, which eventually leads to the failure of the liquid-liquid extraction process.

[0003] Therefore, providing a tributyl phosphate extraction resin for zirconium and hafnium separation with a large capacity for extracting zirconium and a large zirconium and hafnium separation coefficient and its preparation method has become an urgent technical problem in this technical field.