Process for the preparation of halogenoanthraquinones

Details Process for the preparation of halogenoanthraquinones Process for the preparation of halogenoanthraquinones

1975-10-24

1977-02-01

Demers, Arthur P.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07C 4968

Patent

active

040061710

ABSTRACT:
A process for the preparation of a chloroanthraquinone or a bromoanthraquinone comprising treating a molten mixture of at least one nitroanthraquinone and diluent with halogen at a temperature of about 180 to 300.degree. C, the diluent being present in at least about 10% by weight of the mixture and comprising at least one chloroanthraquinone or bromoanthraquinone. The diluent may correspond to the halogenoanthraquinone obtained from the nitroanthraquinone by replacement of the nitro group. A portion of the product can be recycled as diluent for further reaction.

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