process for separating vanadium in the form of vanadium oxide, iron vanadium oxide, or iron vanadium from solutions containing both dissolved iron and dissolved vanadium

摘要

The present invention relates to a process for separating vanadium in the form of vanadium oxide, iron vanadium oxide, or iron vanadium from solutions containing both dissolved iron and dissolved vanadium, wherein an aqueous solution containing dissolved iron and vanadium. at a molar ratio of iron to vanadium above 1: 1, preferably above 1: 1 and up to 10,000: 1, more preferably between 5: 1 and 1000: 1, even more preferably between 5: 1 and 100: 1, and most preferably between 10: 1 and 50: 1 and optionally also other elements, is oxidized in an oxidation step with a gaseous oxidation medium, and wherein the amount of acid in the aqueous solution is kept below the amount. stoichiometric acid requirement during oxidation of divalent iron and the precipitate thus formed is removed from the solution.