Production method of 4-amino-antipyrine oil

The invention discloses a production method of 4-amino-antipyrine oil and belongs to the field of the production method of the 4-amino-antipyrine oil. The production method has the concrete technical scheme that antipyrine is used as raw materials, and the 4-amino-antipyrine oil is prepared through nitrosation, reduction, hydrolysis and neutralization reaction, wherein in the neutralization reaction, when hydrolyzed reaction liquid is lowered to the first specified temperature, ammonia gas is introduced for neutralization, the introduction of the ammonia gas is stopped when the temperature reaches the second specified temperature, the temperature of the reaction liquid is continuously lowered to the third specified temperature, and the ammonia gas is introduced for neutralization until the specified pH value is reached. The production process disclosed by the invention has the advantages that the probability that the 4-amino-antipyrine oil is oxidized is reduced, and the product color comparison is reduced.