Separation of Zirconium and Hafnium by Extraction with 2-octanol.

Separation of Zirconium and Hafnium by Extraction with 2-octanol.

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Zirconium and hafnium are shown to be separable using 2-octanol (C8H18O) as an extractant.Zirconium basic carbonate was dissolved using hydrochloric acids at concentrations ranging from 5 % to 20 %.Potassium fluoride was found to be crucial to the process.Its effect was investigated in the concentration range of 1 Football - Protective - Shoulder Pads M to 3 M.

The optimum conditions obtained for extraction were 10 wt % HCl in a 1.5 M KF solution, a contact time of 15 minutes, and 100 % 2-octanol.Under these conditions, the separation factor of zirconium and hafnium is 9.2 with a maximum extraction percentage of 96.

58 % of zirconium.The optimum conditions for stripping of zirconium were found to be 3 M H2SO4 as stripping agent, an A/O ratio of 1:1 and 40 minutes contact time.The McCabe-Thiele diagrams constructed from the experimental data indicate that four and five equilibrium stages are sufficient for the Hanging Rail extraction and stripping of zirconium respectively.A recovery of 97.

25 % of hafnium was obtained using a mixture of oxalic acid and nitric acid as a stripping agent.A study of chemical speciation in the two phases would be important for the improvement of the process.