先用一摩尔反应量苯酚，加入同样剂量亚硝酸钠，混合后加少许水，产物缓慢加

Primum utere unum molem reactionis phenoli, adde tantundem sodii nitritae, adde parum aquae post mixtionem, tarde adde acidum sulphuricum productum, et expecta reactionem ut procedatur ad locus temperatus. Adde sodium sulfidei post calefactionem, nitrosum. globus reducendus ad amino globus, adde acidum sulphuricum iterum ad 40 ad 50 gradus Celsium, expecta productum aminophenolum ad praecipitandum sicut cerussa.

First, use one mole of phenol to react, add the same amount of sodium nitrite, mix, and add a little water. Slowly add sulfuric acid to the product, and wait at a room temperature for the reaction to proceed on its own. The principle is that nitroso has strong selectivity and is more prone to producing para products. After the reaction is completed, heat and add sodium sulfide. The nitrous group will be reduced to amino groups. Then, add sulfuric acid again at 40 to 50 degrees Celsius, and wait for the product aminophenol to precipitate as a white powder powder.Exactly!