Process for the production of iron oxide yellow pigments

Details Process for the production of iron oxide yellow pigments Process for the production of iron oxide yellow pigments

C - Chemistry, Metallurgy

01

G

6/210, 23/269

C01G 49/06 (2006.01) C09C 1/24 (2006.01)

Patent

CA 2018462

A PROCESS FOR THE PRODUCTION OF IRON OXIDE YELLOW PIGMENTS ABSTRACT OF THE DISCLOSURE A process for the production of iron oxide yellow pigments by the Penniman-Zoph process from the raw materials iron (II) sulfate, sodium hydroxide and metallic iron, is disclosed in which iron (II) is oxidized to iron (III) by gassing with air in the presence of goethite nuclei, the iron (III) sulfate is dissolved to form iron (II) and the goethite nuclei are built up to iron oxide yellow pigments, characterized in that the gassing with air and dissolving of the metal are carried out in separate vessels.

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