The invention relates to a one-pot-method synthesis process for
disperse orange 288. The synthesis process comprises the following specific steps: (1) carrying out diazotization: adding p-
nitroaniline into a proper volume of water, introducing a certain volume of
sulfur trioxide gas into the water, carrying out pulping, adding a proper volume of ice into the pulp so as to cool the pulp to a temperature below 0 DEG C, rapidly adding a proper volume of 30% (
mass percent)
sodium nitrite solution into the cooled pulp, carrying out heat preservation, carrying out a test by adopting
potassium iodide test paper (a reaction ends when the test paper becomes blue), adding a proper volume of aminosulfonic acid into the reacted solution so as to remove superfluous
sodium nitrite, and adding a certain volume of OP-10 and Peregal O into the reacted solution; and (2) carrying out
coupling. The synthesis process has the beneficial effects that the product, i.e., the
disperse orange 288 is prepared through taking p-
nitroaniline as a
raw material, subjecting
sulfur trioxide and
sodium nitrite to a diazotization reaction and carrying out one-pot-method
coupling with N-cyanoethyl-N-benzylaniline, the
process operation is simple and convenient, the product is high in yield and high in purity, and the volume of waste gases, waste water and waste residues is small, so that environment-friendly and clean production is achieved.