Preparation of rutile TiO2 by hydrolysis of TiOCl2 solution: experiment and theory

HCl can decompose CaTiO₃-type titanium slag and obtain a TiOCl₂ solution. By hydrolysis of TiOCl₂, rutile TiO₂ can be prepared according to the structural rearrangement: (Ti₂O₂)(H₂O)₄Cl₄–Ti(OH)(H₂O)₂Cl₃–Ti(OH)₂Cl₂–rutile-type Ti(OH)₂Cl₂–rutile TiO₂.