Chemistry of carbon compounds – Miscellaneous organic carbon compounds – C-metal
Patent
1977-09-07
1979-06-12
Waltz, Thomas
Chemistry of carbon compounds
Miscellaneous organic carbon compounds
C-metal
C07C 4968
Patent
active
041580095
ABSTRACT:
A mixture of various dinitroanthraquinone isomers prepared from anthraquinone by mixed acid nitration is subjected to a suspension treatment at a temperature above 50.degree. C. with a mixed acid of a content satisfying the following three equations and then the crystals of 1,5-dinitroanthraquinone are separated:
REFERENCES:
patent: 3818052 (1974-06-01), Hohmann et al.
patent: 3906011 (1975-09-01), Auge et al.
patent: 3963761 (1976-06-01), Vogel
patent: 3963762 (1976-06-01), Hohmann
Chemical Abstracts, vol. 26, 1932, p. 1278, Hefti, E., "Dinitro-anthraquinones".
Chemical Abstracts, vol. 83, No. 9, Jan. 16, 1975, p. 636, abstract No. 78970w, "1,5-dinitroanthraquinone separation from its isomers".
Fukuda Yutaka
Koga Shinichiro
Takeda Yoshiyuki
Covington Raymond K.
Mitsubishi Chemical Industries Ltd.
Waltz Thomas
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