Question

Outline the principles of refining of metals by the following methods:  Vapour phase refining

Write the principles of Vapour phase refining methods

Answer 1

Vapour phase refining : -

Vapour phase refining is the process of refining metal by converting it into its volatile compound and then, decomposing it to obtain a pure metal. To carry out this process,

(i) the metal should form a volatile compound with an available reagent, and

(ii) the volatile compound should be easily decomposable so that the metal can be easily recovered.

Nickel, zirconium, and titanium are refined using this method.

Answer 2

Vapour phase refining: In this process, the impure metal is converted into its volatile compound, which is decomposed to obtain the pure metal.

The basic requirements for the vapour phase refining are:

(a) The metal should form a volatile compound with an available reagent.

(b) The volatile compound should decompose easily so that pure metal should be recovered.