The invention provides a novel preparation method of an insensitive explosive
TATB. The method comprises the following steps: 1, with 2,4,6-
trinitrotoluene as a
raw material, subjecting 2,4,6-
trinitrotoluene to reacting with
hydrogen and
acetic anhydride in sequence to obtain 2,4,6-triacetylaminotoluene; 2, subjecting the obtained 2,4,6-triacetylaminotoluene o oxidation and a
decarboxylation reaction to obtain 1,3,5-triacetylaminobenzene; and 3, carrying out
nitrification and
hydrolysis reactions on the obtained 1,3,5-triacetylaminobenzene to obtain 2,4,6-trinitro-1,3,5-triaminobenzene. According to the invention, the
raw material used in the preparation method is the cheap 2,4,6-
trinitrotoluene, and used reactants or catalysts are commonly used products in the
chemical industry, so the preparation method has characteristics of low cost and usage of simple and easily available raw materials. In addition, the preparation method also has the characteristics of short synthesis steps, simple operation of each step, high yield, high
reaction rate, easy separation and collection of intermediate and final products and the like, and is beneficial for realization of
mass production of
TATB.