Process for the preparation of isometric magnetic iron oxide...

Details Process for the preparation of isometric magnetic iron oxide... Process for the preparation of isometric magnetic iron oxide...

C - Chemistry, Metallurgy

01

G

6/210, 23/267

C01G 49/02 (2006.01) C09C 1/24 (2006.01) G11B 5/706 (2006.01)

Patent

CA 1291318

PROCESS FOR THE PREPARATION OF ISOMETRIC MAGNETIC IRON OXIDE PIGMENTS Abstract of the Disclosure Isometric iron oxide pigments are prepared by an im- proved process by precipitation of aqueous solutions con- taining iron (II) salts with alkaline precipitating agents followed by oxidation of the precipitate at temperatures of from 20°C to 100°C, wherein the improvement comprises adjusting the iron (III) content to 1 to 25 mol %, based on the total iron, before precipitation.

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