为了回收废旧B炸药中的RDX,采用超临界萃取技术对B炸药进行了处理,探讨了工艺条件对萃取效果的影响,确定了最佳工艺条件,并且对萃取前后的样品进行了纯度、红外和扫描电镜测试。结果表明:样品中TNT的萃取率和温度、压力以及保压时间有密切关系,当体系温度为51℃、操作压力为35MPa、保压时间为10min时,TNT的萃取率最高,萃取效果最好,RDX的纯度可以达到88%。 In order to recover RDX from used B explosives, B explosive was treated by supercritical fluid extraction, the effect of process conditions on the extraction was discussed, and the optimum process conditions were determined. The purity, infrared and SEM test. The results show that the extraction rate of TNT is closely related to the temperature, pressure and dwell time. When the system temperature is 51 ℃, the operating pressure is 35MPa and the dwell time is 10min, the TNT has the highest extraction rate and the best extraction efficiency , RDX purity can reach 88%.