ESTUDO DA SEPARAÇÃO DO PAR ZIRCÔNIO E HÁFNIO POR TROCA IÔNICA/SEPARATION OF ZIRCONIUM FROM HAFNIUM BY ION EXCHANGE

• Published in: Holos (Natal, RN) Vol. 30; no. 3; p. 291
• Main Authors: Felipe, E C B, Ladeira, A C Q
• Format: Journal Article
• Language: Portuguese
• Published: Natal Instituto Federal de Educacao Ciencia e Tecnologia do Rio Grande do Norte 01-05-2014
• ISSN: 1518-1634; 1807-1600

The current work consists in the separation of zirconium and hafnium by the ion exchange method in order to obtain a zirconium concentrate of high purity. The zirconium and hafnium liquors were produced from the leaching of the Zr (OH)^sub 4^ and Hf (OH)^sub 4^ with nitric acid for 24 hours. From these two liquors, it was prepared one solution containing 7,5x10^sup -2^ mol L^sup -1^ of Zr and 5,8x10^sup -3^ mol L^sup -1^ of Hf with acidity of 1 M. Ion exchange experiments were carried out in batch with the resins Dowex 50WX4, Dowex 50WX8 100, Dowex 50WX8 50, Amberlite IR-120 and Marathon C at constant temperature 28 degree Celsius. Other variables such as, acidity and agitation were kept constant. The results of maximum loading capacity for Zr and Hf, in mmol g^sup -1^ showed that, the most suitable resins for columns experiments are: Dowex 50WX4 50 , Dowex 50WX8 50 and Amberlite. However, separations factors showed that the resins are not selective.