Production of non-carcinogenic large particle carbon black

Details Production of non-carcinogenic large particle carbon black Production of non-carcinogenic large particle carbon black

1976-04-30

1978-02-21

Jacobs, Lewis T.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

260 4248, 423445, 423450, 423460, C08K 304

Patent

active

040751562

ABSTRACT:
A non-carcinogenic large particle carbon black both produced by severely aftertreating a carbon black-containing smoke to result in a carbon black with a photelometer of 100% and a pitting value (nitrogen surface area minus CTAB surface area) of about 0.2 m.sup.2 /g or more to 7 m.sup.2 /g or more for a carbon black of 30 m.sup.2 /g to 80 m.sup.2 /g CTAB surface area, oxidizing the black as well as by high temperature drying the wet pelleted carbon black at a temperature of about 500.degree. to 600.degree. F. The CTAB surface area of the carbon black is less than 80 m.sup.2 /g and preferably about 30 to 60 m.sup.2 /g.

REFERENCES:
patent: 2686107 (1954-08-01), Jordan
patent: 3102005 (1963-08-01), Dye
patent: 3290791 (1966-12-01), Keaton
patent: 3409406 (1968-11-01), Murray
patent: 3523812 (1970-08-01), Kraus
patent: 3761577 (1973-09-01), Dahmen et al.

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