Six quaternary ammonium metal-containing ionic liquids (ILs) [NR3H]n[MCl4]and [NR4]n[MCl4] (M=Fe, Co or Cu, n=1 or 2) have been prepared by the extractive reaction of metal ions from hydrochloride medium using ammonium extractants N235 and Aliquat336 (A336).The preparations of metal-containing ILs are based on the following extractive equations.