Process for the preparation of halogenoanthraquinones

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

C - Chemistry, Metallurgy

07

C

260/236.2

C07C 50/16 (2006.01) C07C 46/00 (2006.01)

Patent

CA 1060008

PROCESS FOR THE PREPARATION OF HALOGENOANTHRAQUINONES Abstract of the Disclosure A process for the preparation of a chloroanthra- quinone or a bromoanthraquinone comprising treating a molten mixture of at least one nitroanthraquinone and diluent, the diluent being present in at least about 10% by weight of the mixture with halogen at a temperature of about 180 to 300 °C, 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. - 1 -

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