FIELD: chemistry.
SUBSTANCE: invention can be used in chemical industry. For concentration and separation of metal chlorides into/from iron (III) chloride-containing hydrochloric acid solution, iron (III) chloride is converted by hydrolysis in haematite and is precipitated from said solution. Haematite is filtered in a filtering device to produce a filtrate of hydrochloric acid. Concentrated non-hydrolysable metal chlorides are precipitated from iron-containing filtrate of hydrochloric acid by increasing concentration of free hydrogen chloride in solution.
EFFECT: invention enables to reduce concentration of hydrochloric acid and power consumption during process, increases degree of recovery of hydrogen chloride.
9 cl, 4 dwg, 6 tbl, 8 ex
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