VERFAHREN ZUR HERSTELLUNG EINER WÄSSRIGEN EISEN(III)CHLORID ENTHALTENDE LÖSUNG

摘要

The present invention provides a process for preparing an aqueous solution of FeCl3. The process involves the steps of: (a) reacting an ore material comprising titanium and iron with chlorine and coke to form a metal chloride vapor stream comprising titanium tetrachloride, ferrous chloride, ferric chloride and unreacted coke and ore solids; (b) cooling the metal chloride vapor stream to a temperature in the range of 350 to 500 DEG C. to condense at least some of the ferrous chloride; (c) separating the condensed ferrous chloride and the unreacted coke and ore solids from the metal chloride vapor stream; (d) cooling the metal chloride vapor stream to a temperature in the range of 180 to 240 DEG C. to form a precipitate comprising ferric chloride; and (e) adding the precipitate to water to form an aqueous solution comprising ferric chloride. The resulting aqueous solution has a high FeCl3 content, and can be used in wastewater treatment applications.