Process for the purification of anthraquinone

Details Process for the purification of anthraquinone Process for the purification of anthraquinone

1982-04-29

1984-05-22

Trousof, Natalie

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 4968

Patent

active

044501110

ABSTRACT:
In a process for purifying crude anthraquinone obtained by the oxidation, by molecular oxygen in an aqueous alkali metal hydroxide solution, of an adduct obtained by the Diels-Alder reaction of butadiene with 1,4-naphthoquinone obtained by a catalytic vapor phase oxidation reaction of naphthalene, an improvement characterized in that said crude anthraquinone is subjected to oxidation treatment in an aqueous medium in the presence of a hypochlorite.

REFERENCES:
patent: 1404056 (1922-01-01), Portheim
patent: 2120678 (1936-03-01), Parsons et al.
patent: 3870730 (1975-03-01), Scharte et al.
patent: 4155922 (1979-05-01), Wenzel et al.
patent: 4284576 (1981-08-01), Schenk et al.
Chemical Abstract, vol. 82, No. 111821f, Paluch, "Reaction of Chlorine Dioxide and Sodium Chloride With Some Organic Compounds", 1974.
U. K. Search Report No. 13033 (1982).

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