Question

Explain the following:

Vapour phase refining method is used for the purification of Ti.

Answer 1

In the process of vapour refining an impure metal is treated with a suitable reagent to form volatile compound which is decomposed at high temperature to get pure metal. Here, Ti can form volatile compound (I₁I₄) with the iodine and the compound is easily decomposable to give extra pure Ti. So, the recovery is easy.