Nitrolysis of DADN to prepare HMX in AIL-N₂O₅- HNO₃ system

Study on the nitrolysis of DADN to HMX was carried out in N ₂O₅-HNO₃ system under the catalysis of acidic ionic liquid (AIL). The effects of various parameters, such as dosage of the AIL, the molar ratio of materials, reaction time, reaction temperature and AIL type on the nitrolysis were investigated. The results showed that [Et ₃NH]TsO was the best catalyst among 21AIL used. The purity of HMX obtained was 99%. HMX could be achieved in a higher yield of up to 95. 6%. AIL could be efficiently recovered by simple extraction without any apparent loss of catalytic activity even after five runs.