Production of 1-nitroanthraquinone and 1-aminoanthraquinone

Details Production of 1-nitroanthraquinone and 1-aminoanthraquinone Production of 1-nitroanthraquinone and 1-aminoanthraquinone

1975-10-24

1977-08-30

Shaver, Paul F.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260378, 260379, C07C 7910, C09B 100, C07C 7936

Patent

active

040454541

ABSTRACT:
A process for producing 1-nitroanthraquinone with high purity which comprises treating crude 1-nitroanthraquinone containing as the main impurities dinitroanthraquinones and .beta.-nitroanthraquinone with an alkali sulfite in an aqueous medium under heating and which is characterized in that the crystals of the crude 1-nitroanthraquinone are pulverized by the aid of a pulverizer, a fine pulverizer or an ultra-fine pulverizer prior to and/or during the treatment with the aqueous alkali sulfite; and a process for producing 1-aminoanthraquinone which comprises subjecting the reaction mixture obtained by the said treatment with the alkali sulfite solution mentioned above, if necessary after further fine pulverization, to a reaction with a reducing agent, or ammonia or an aliphatic or aromatic amine.

REFERENCES:
patent: 3959317 (1976-05-01), Thiem et al.

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