Process for preparing an iron oxide

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

1984-02-22

1986-11-25

Doll, John

Chemistry of inorganic compounds

Oxygen or compound thereof

Metal containing

423493, C01G 4906, C01G 4910

Patent

active

046248455

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 oxidized 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 7 containing an inert packing material e.g. aluminosilicate ceramic balls. The reaction charge including packing material, metallic iron and the salt is introduced via hopper 13. A tube 7 is externally heated by electrical resistance elements 10 and chlorine and an oxidizing gas are introduced at inlet 8 and the off-gas removed at outlet 9. 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.

REFERENCES:
patent: 3376112 (1968-04-01), Dunn, Jr. et al.
patent: 3793444 (1974-02-01), Reeves et al.
patent: 3864463 (1975-02-01), Chao
patent: 4179492 (1979-12-01), Krusei

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