Process for production of high-purity iron oxide

Details Process for production of high-purity iron oxide Process for production of high-purity iron oxide

C - Chemistry, Metallurgy

01

G

23/270

C01G 49/06 (2006.01)

Patent

CA 1165978

ABSTRACT OF THE DISCLOSURE A process for producing iron oxide comprising: a step of bringing an iron-ion-containing organic solvent con- taining one or more compounds selected from the group consist- ing of alkyl phosphoric acid alkyl and aryl dithio phosphoric acids, carboxylic acid, and hydroxime together with a petroleum hydrocarbon as a diluent into contact with an aqueous solution containing one or more compounds selected from the group con- sisting 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 in gas stream containing oxygen or H2O.

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