Process for separating 1,5-dinitroanthraquinone and 1,8-dinitroa

Details Process for separating 1,5-dinitroanthraquinone and 1,8-dinitroa Process for separating 1,5-dinitroanthraquinone and 1,8-dinitroa

1974-12-17

1977-08-30

Curtis, Allen B.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C09B 100

Patent

active

040454550

ABSTRACT:
The present invention relates to a process for separating substantially pure 1,5-dinitroanthraquinone and substantially pure 1,8-dinitroanthraquinone from anthraquinone dinitration mixtures containing 1,5- and 1,8-dinitroanthraquinone, whereby such mixtures are treated with a mixture of concentrated nitric acid and an inert organic solvent, the insoluble 1,5-dinitroanthraquinone is separated off and the 1,8-dinitroanthraquinone isolated from the remaining mother liquor.

REFERENCES:
patent: 2435314 (1948-02-01), Kokatnur
patent: 3163657 (1964-12-01), Morgan et al.
patent: 3506725 (1970-04-01), Sturm et al.
patent: 3818052 (1974-06-01), Hohmann et al.
patent: 3923845 (1975-12-01), Bantel et al.

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