C - Chemistry – Metallurgy – 09 – C
Patent
C - Chemistry, Metallurgy
09
C
23/313
C09C 1/56 (2006.01) C01B 31/02 (2006.01) C21B 15/00 (2006.01) C22B 7/02 (2006.01)
Patent
CA 1142325
ABSTRACT OF THE DISCLOSURE: The invention relates to a process for the removal of metals, especially of iron/or nickel and/or vanadium or their compounds, from carbon black. To this end, the invention provides for an aqueous carbon black suspension to be heated to a temperature of about 30 to 90° C, for chlorine to be passed therethrough with agitation. The chlorine gas is used in a stoichiometric excess, based on the metal content of the aqueous carbon black suspension. Next, the carbon black is separated from the aqueous suspension and dried.
364041
Heymer Gero
Wolter Manfred
Fetherstonhaugh & Co.
Hoechst Aktiengesellschaft
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