Sodium Hydroxide → 1-Aminoanthraquinone

Participants

Reaction Steps

2.6 Grams (0.01 mol) of 5-nitrotetrahydroanthraquinone, 52 grams (0.032 mol) of a 2.5% aqueous sodium hydroxide solution and 0.07 gram of a Raney nickel catalyst were placed in an electromagnetic agitation-type autocalve with an inner volume of 160 ml, followed by hydrogenation while agitating under a pressure of 3 to 6 kg/cm2G at room temperature. The hydrogenation reaction proceeded smoothly. 6 Hours after commencement of the reaction, 0.02 mol of hydrogen was absorbed and the absorption was stopped. Then, the hydrogen in the reaction system was replaced by nitrogen and the resultant reaction solution was filtered in a flow of nitrogen for separating the catalyst therefrom. Air was passed into the resultant filtrate for oxidation to obtain 2.1 grams of 1-aminoanthraquinone (at a yield of 93.1%). The purity was 97%.

Provenance & Evidence