Patent ID: 8574527

Claim:
A process for treating carbon black in a fluidized bed apparatus, comprising: a) subjecting said carbon black to a main flow of gas flowing in a direction from an inlet region in the lower part of said fluidized bed apparatus to an outlet region in the upper part of said fluidized bed apparatus, wherein: i) a carrier gas is introduced in the lower part of said fluidized bed apparatus; and ii) an additional gas is also introduced into said fluidized bed apparatus, wherein said additional gas is introduced at an angle of 91° to 180° relative to the direction of the main gas flow of the fluidized bed in a stream counter to the direction of the main gas flow, and wherein it is the introduction of said additional gas that allows a stable fluidized bed to be obtained; b) treating said carbon black in said fluidized bed apparatus with a gas aftertreatment agent introduced into the fluidized bed via the carrier gas, the additional gas, via a combination of the two or via an additional feed site.