Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
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.
Fukasawa Akira
Masaki Shinzaburo
Yamada Eiji
Shaver Paul F.
Sumitomo Chemical Company Limited
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