Process for preparing an iron oxide

Details Process for preparing an iron oxide Process for preparing an iron oxide

C - Chemistry, Metallurgy

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C01G 49/06 (2006.01) B01J 10/00 (2006.01) C09C 1/24 (2006.01)

Patent

CA 1250732

ABSTRACT A process is disclosed for the production of micaceous iron oxide using metallic iron, for example scrap iron, as a feed stock for the preparation of an iron chloride and the resulting iron chloride is oxidised at an elevated temperature in the presence of a salt of an alkali metal or alkaline earth metal, preferably sodium chloride. A reaction may be effected in a packed tower reactor comprising a refractory tube containing an inert packing material e.g. alumino- silicate ceramic balls. The reaction charge including packing material, metallic iron and the salt is intro- duced via hopper. A tube is externally heated by electrical resistance elements and chlorine and an oxidising gas are introduced at inlet and the off-gas removed at outlet. The micaceous iron reaction product is obtained as a coating on the inert packing material. Micaceous iron oxide is used as a pigment for the formulation of metal protective paints.

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