Method for easily removing zinc from carbon black...

Details Method for easily removing zinc from carbon black... Method for easily removing zinc from carbon black...

C - Chemistry, Metallurgy

01

B

23/313

C01B 31/02 (2006.01) C09C 1/56 (2006.01)

Patent

CA 1131882

A METHOD FOR EASILY REMOVING ZINC FROM CARBON BLACK CONTAMINATED WITH ZINC Abstract of the Disclosure: The present invention relates to a method for removing zinc from solid carbon black, preferrably obtained from the pyrolysis of rubber, said carbon black containing at least 3%, by weight, of zinc, calculated as ZnO, said method including the steps of contacting the carbon black at a temperature of at least 732° C. with a gas selected from chlorine and hydrogen chloride to form gaseous zinc chloride from the zinc contained in said carbon black, and separating the gaseous zinc chloride from the solid carbon black. - 1 -

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