PROCESS FOR THE PRODUCTION OF HIGH-PURITY IRON OXIDE

摘要

Described is a process for the production of high-purity iron oxide comprising: A step of contacting an iron ions-containing organic solution containing one or more compounds selected from the group consisting of alkyl phosphoric acids, alkyl and aryl dithio phosphoric acids, carboxylic acids and hydroxyoximes together with a petroleum hydrocarbon as a diluent with an aqueous solution containing one or more compounds selected from the group consisting of HF, NH4HF2 and NH4F to obtain ammonium iron fluoride or iron fluoride, and a step of heating the ammonium iron fluoride or iron fluoride obtained in a gas atmosphere containing oxygen or water.