Method for the treatment of fluidized carbon black utilizing lev

Details Method for the treatment of fluidized carbon black utilizing lev Method for the treatment of fluidized carbon black utilizing lev

1985-06-21

1987-03-03

Heller, Gregory A.

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

423449, 423450, 423461, 422 62, C09C 156, C09C 148, C01B 3102

Patent

active

046474447

ABSTRACT:
Method for the treatment of fluidized carbon black with gases in a fluidized bed, wherein the carbon black and the treatment gases are conveyed for introduction in an unique operating procedure into the treating region in a countercurrent stream manner. The mass stream of the carbon black and the treating gases are held constant and the mass streams of the starting carbon black or the treated carbon black is regulated with the help of an optical electrical level sensor means so that the height of the fluidized bed is bed is held on a predetermined level. An apparatus is shown for the carrying out of the fluidized bed countercurrent process which has a novel carbon black product delivery system and is provided with a optical electrical level sensor means for controlling the level of the fluidized bed. The sensor means comprises a hair pin shaped lighting circuit composed of two legs or rods separated by a gap. A light source impinges on the end of one of he said legs and the other leg is oriented to an electrical signal generating light sensor.

REFERENCES:
patent: 3318720 (1967-05-01), Johnson et al.
patent: 4138471 (1979-02-01), Lamond et al.
patent: 4453950 (1984-06-01), Fasching

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