Which method is used for refining Zr and Ti? Explain with equation.


Van Arkel method is used for refining Zr and Ti. Van Arkel process involves heating the impure metal with Iodine. It forms a volatile complex which on decomposition at high temperatures, gives back the metal but in very pure form.

Refining of Zr and Ti using Van Arkel method


For Zirconium,


Zr(impure) + 2I2 ZrI4


ZrI4Zr(pure) + 2I2 (at 1800K)


For Titanium,


Ti(impure) + 2I2 TiI4


TiI4 Ti(pure) + 2I2 (at 1800K)


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