Process for obtaining an aqueous iron iii - chloride solution, as well as a substantially iron iii - chloride-free aqueous solution of metal chlorides

摘要

1277304 Solvent extraction of iron compounds KANTO DENKA KOGYO CO Ltd 16 Sept 1969 [19 Sept 1968 20 Sept 1968] 45616/69 Headings C1A and C1N Ferric chloride is separated from an aqueous hydrochloric acid solution of metal chlorides by extracting the solution with a mono-ketone or an ether having from 4 to 10 carbon atoms or by a mixture of said ketones or ethers in an inert carrier solvent immiscible with the aqueous hydrochloric acid solution, in a ratio of two moles of ketone or ether per mole of ferric chloride. The ferric chloride passes into the organic phase and is recovered by extracting the organic phase with an aqueous solvent. The distribution of ferric chloride in the organic phase may be improved by the provision of an excess of chloride ions in the aqueous solution, and/or by the presence of the other metal chlorides in the solution and, if necessary, by the addition of HCl to the solution. The carrier solvent may be a hydrocarbon or chlorinated hydrocarbon. Particular reference is made to the use of the process for recovery of iron values from ores, e.g. iron ores, titaniferous ores, bauxite and laterite, and from scrap iron. In the process described the ore, or scrap iron, is first leached with HCl to convert the metal values to their chlorides, and then oxidized to convert any ferrous chloride to ferric chloride prior to solvent extraction. With titaniferous ores the aqueous raffinate, containing titanium chloride, remaining after solvent extraction may readily be worked up to recover titanium dioxide.