Production of non-carcinogenic carbon black

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

040751570

ABSTRACT:
A non-carcinogenic normal cure carbon black is produced by severely aftertreating a carbon black-containing smoke to result in a carbon black with a photelometer of 100% and a pitting value of about 15 m.sup.2 /g or more in case of small particle carbon black (CTAB of 120 m.sup.2 /g) and of 0.2 m.sup.2 /g or more in case of large particle carbon black (CTAB of 30 m.sup.2 /g) by contacting the carbon black with an oxidizing agent, by high temperature drying the carbon black at a temperature of about 500 to about 600.degree. F and finally by aftertreating the dried carbon black at a high temperature of about 1,000 to 1,400.degree. F.

REFERENCES:
patent: 2707673 (1955-05-01), Sweitzer et al.
patent: 3290791 (1966-12-01), Keaton
patent: 3523812 (1970-08-01), Kraus
patent: 3761577 (1973-09-01), Dahmen et al.
patent: 3830774 (1974-08-01), Jordan et al.
patent: 3887690 (1975-06-01), West et al.

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