Magnetic separation to improve purity of iron oxide pigments

Details Magnetic separation to improve purity of iron oxide pigments Magnetic separation to improve purity of iron oxide pigments

C - Chemistry, Metallurgy

09

C

209/87

C09C 1/24 (2006.01) B03C 1/00 (2006.01) C01B 13/16 (2006.01) C01G 49/06 (2006.01) C09C 3/04 (2006.01)

Patent

CA 1177787

MAGNETIC SEPARATION TO IMPROVE PURITY OF IRON OXIDE PIGMENTS ABSTRACT OF THE DISCLOSURE A process for increasing the color purity of iron oxide pigment particles admixed with color- modifying impurities and obtained by the Penniman process or the aniline process, comprising introducing the particles into a magnetic field, and removing from the magnetic field two fractions of different magnetizability, the first fraction being iron oxide pigment particles of increased color purity and the second fraction being enriched in impurities. Le A 20 443

379989

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