Process for removing carbon black from aqueous suspensions

Details Process for removing carbon black from aqueous suspensions Process for removing carbon black from aqueous suspensions

C - Chemistry, Metallurgy

01

B

23/312

C01B 31/02 (2006.01) C09C 1/48 (2006.01) C09C 1/56 (2006.01)

Patent

CA 1150933

PROCESS FOR REMOVING CARBON BLACK FROM AQUEOUS SUSPENSIONS ABSTRACT OF THE DISCLOSURE: The invention relates to a process for removing carbon black from an aqueous suspension obtained by washing a gas containing carbon black with water. To this end, a gas stream comprising hydrocarbons and at least one inert gas is introduced into a suspension having a solids content of from 0.5 to 4 % by weight, at a temperature of from 10 to 80° C. In so doing, the carbon black agglomerates and collects on the surface of the suspension water from which it is separated, for example by skimming it off. The gas stream is produced by passing inert gas over the separated carbon black containing the hydrocarbons and heated to 200 to 400° C, the carbon black being converted into a dry, free-flowing material.

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