METHOD FOR ZIRCONIUM AND HAFNIUM SEPARATION

摘要

The invention relates to the field of zirconium and hafnium hydrometallurgy and can be used while receiving pure zirconium and hafnium compounds by extraction method. The method includes zirconium and hafnium extraction by tributylphosphate in the organic diluent of nitrate solution, zirconium and hafnium re-extraction. The extraction is carried out by 70% of tributylphosphate diluent (kerosene cuts) of nitrate solution. The hafnium re-extraction is carried out by nitric acid solution with concentration of 180-220 g/l at the ratio of organic and water phases of . The zirconium re-extraction iscarried out by nitric acid with concentration of 10-15 g/l. The zirconium is additionally derived of hafnium re-extract by 70% tributylphosphate solution in the organic diluent at the ratio of organic and water phases of . The process is carried out in centrifugal extractors cascade. The use of the invention allows receiving zirconium re-extract with the content of g/l and specific hafnium content less than 0,002% and simultaneously refined hafnium with actual content of the last of g/l and specific content to .