Which one of the following methods is neither meant for the synthesis nor for separation of amines?

Alkyl halides are converted into alkanes using the Wurtz reaction.

$2\mathrm{R}-\mathrm{X}+2\mathrm{Na}\stackrel{\text{ Dry ether }}{⟶}\underset{\text{ alkane }}{\mathrm{R}}-\mathrm{R}+2\mathrm{NaX}$

R is an alkane where

A halide, X

All other methods are employed to prepare amines.