METHOD OF PROCESSING ZIRCONIUM TETRACHLORIDE TO OBTAIN ZIRCONIUM DIOXIDE AND HYDROCHLORIC ACID Russian patent published in 2012 - IPC C01G25/02 

FIELD: chemistry.

SUBSTANCE: invention relates to methods of processing zirconium tetrachloride and can be used in chlorine metallurgy when producing zirconium dioxide and hydrochloric acid. The method involves mixing zirconium tetrachloride with water in molar ratio ZrCL₄:H₂O=1:(1.0-1.2), obtaining zirconium oxychloride and hydrogen chloride gas, dissolving zirconium oxychloride in water, adding sulphuric acid with distillation of the HCl-H₂O azeotropic mixture and precipitation of basic zirconium sulphate, filtering the suspension, washing and calcining the residue to obtain zirconium dioxide. Hydrogen chloride gas formed when producing zirconium oxychloride is taken for absorption, where the absorbent used is the HCl-H₂O azeotropic mixture obtained during precipitation of basic zirconium sulphate. Concentrated hydrochloric obtained from absorption can be used in non-ferrous metallurgy when leaching concentrates and ores, etching metal surfaces of equipment, metal-roll and for other purposes.

EFFECT: invention simplifies the technique of producing zirconium dioxide and concentrated hydrochloric acid.

1 dwg, 1 ex