METHOD OF OBTAINING A YELLOW PIGMENT OF GREENISH UNDERTONE

摘要

Preparation of yellow pigment with greenish shade through diazotisation of an active component and conjugation of diazone compound with acetyl acetic o-chloranilide, characterised in that 2-chlor-4-nitroaniline is used as the active component, which is diazotised with sodium nitrite in the presence of hydrochloric acid and in temperature from 0 degree C to minus 2 degrees C, and thus obtained diazone compound is then conjugated with acetyl acetic o-chloranilide in room temperature and in acetate environment, followed by pigment separation from the mass reaction using a know method.