The reaction between titaniferous magnetite and NH₄Cl was experimentally investigated in order to find the possibility of NH₄Cl being an alternative chlorine source.
Iron oxides among the components of titaniferous magnetite was selectively chlorinated in this reaction. The optimum conditions for this chlorination were that NH₄Cl weight ratio to the titaniferous magnetite 3.5, reaction temperature 350 ℃, reaction time 50 min, N₂ gas flow rate 30 cm³/min （reactor size : ID=2.8 cm） and particle size of titaniferous magnetite-140 mesh.
Under above mentioned conditions, the conversions of iron oxide to iron chloride were 94.8 % for iron （III） oxide and 25.2 % for iron (II) oxide, respectively. The analysis of the residues left after the water leaching of the chlorinated product at these reaction conditions showed that the content of TiO₂ was 45.18 % and the x-ray diffraction pattern showed ilmenite.