1-Nitroanthraquinone → 1-Aminoanthraquinone

Participants

Reaction Steps

A slurried mixture of a nitroanthraquinone and water having dissolved therein sodium sulfate and sodium nitrate (nitroanthraquinone concentration: 5.28%, sodium sulfate and sodium nitrate concentration: 4%, the remainder being water) and a 30.9% sodium hydrosulfide aqueous solution were supplied into a 1,500-volume-part stainless steel vessel under agitation at the rates of 383.3 part/hr, and 41.7 part/hr, respectively, and three hours after start of supply, withdrawal of the reaction mixture was started at a constant rate of 425 part/hr. The reaction temperature was maintained at 97°-98° C. during this operation. The effluent was cooled to 70°-80° C., filtered, washed and dried to obtain an aminoanthraquinone (dry cake). The aminoanthraquinone efflux rate from the 6th hour and afterward after start of withdrawal was 16.8 part/hr.

Provenance & Evidence