Process for reducing the polycyclic aromatic hydrocarbon content

Details Process for reducing the polycyclic aromatic hydrocarbon content Process for reducing the polycyclic aromatic hydrocarbon content

1977-03-03

1979-02-06

Vertiz, O. R.

Chemistry of inorganic compounds

Carbon or compound thereof

Elemental carbon

423445, 423461, C09C 156, C01B 3100, C01B 3102

Patent

active

041384717

ABSTRACT:
The amount of polycyclic aromatic hydrocarbons on the surface of a carbon black can be reduced below 2 ppb by heat treating the carbon black in a fluidized bed. Dried furnace carbon black pellets are charged in a fluid bed unit and preheated. The pellets are then fluidized with air, with the temperature of the bed between 1150.degree. F and 1850.degree. F for 5 to 40 minutes. The carbon black is then quenched and recovered.

REFERENCES:
patent: 2005022 (1935-06-01), Damon
patent: 2707672 (1955-05-01), Sweitzer
patent: 2707674 (1955-05-01), Sweitzer
patent: 3130133 (1964-04-01), Loevenstein
patent: 3993739 (1976-11-01), Vanderveen
patent: 4075157 (1978-02-01), Johnson

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