1-Nitroanthraquinone → 1-Aminoanthraquinone

Participants

Reaction Steps

A 1-nitroanthraquinone (98.0% purity) and water mixture with slurry concentration of 17.2% and a 12.0% aqueous solution of sodium hydrosulfide were added dropwise into a 2,000-volume-part glass-made vessel under agitation while maintaining the internal temperature of the vessel at 94°-96° C. The feeding rates of the 1-nitroanthraquinone-water mixture and the 12.0% sodium hydrosulfide solution were maintained constant at 1,055 part/hr and 945 part/hr, respectively. One hour after start of pouring, withdrawal of the reaction mixture from the bottom of the flask was started, with the efflux rate being maintained constant at 2,000 part/hr. The flow rate of 1-aminoanthraquinone (98.5% purity) in the effluent obtained from the 6th hour and afterward was 158 part/hr.

Provenance & Evidence