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Zirconium Hafnium Hydrometallurgy

The results show that the extraction of zirconium and hafnium fit with pseudofirst order reaction, and the extraction kinetic of zirconium is governed by chemical reactions at bulk phase with activation energy e a, zr of 102 kjmol, while for hafnium, it is proved to be controlled by mixedcontrol, whose activation energy e a, hf is.