Solubility determination and comparison ofβ-HMX and RDX in two binary mixed solvents(acetonitrile+water,nitric acid+water)  

作　　者：Yuehua Yao Fan Wang Yinguang Xu Zishuai Xu Lizhen Chen Jianlong Wang 

机构地区：[1]School of Chemistry and Chemical Engineering,North University of China,Taiyuan 030051,China [2]Gansu Yinguang Chemical Industry Group Co.Ltd.,Baiyin 730900,China

出　　处：《Chinese Journal of Chemical Engineering》2024年第5期238-249,共12页中国化学工程学报（英文版）

摘　　要：In order to remove hexahydro-1,3,5-trinitro-1,3,5-triazine(RDX),the main impurity,in process of polymorphic transformation of octrahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine(HMX),the solubility ofβ-HMX and RDX in acetonitrile(ACN)+water in the temperature range of 288.15-333.15 K and in nitric acid(HNO_(3))+water in the temperature range of 298.15-333.15 K were measured by laser dynamic method.The results showed that the solubility of bothβ-HMX and RDX in binary mixed solvents increased monotonously as the temperature increase at a given solvent composition or with increasing of mole fraction of solvent(ACN and nitric acid).Solubility data were well correlated by the modified Apelblat equation,Jouyban-Acree model,Yaws equation and van't Hoff equation,and the Yaws equation achieved the best fitting results according to the relative error and the mean square error root.Furthermore,the solubility ofβ-HMX and RDX in binary mixed solvent was compared,based on the solubility difference and the solvent's own properties,the best separation degree ofβ-HMX and RDX was found when the mole fraction of nitric acid was 0.22 at room temperature,which provided data support for HMX crystallization in mixed solvent.The solubility differences between RDX andβ-HMX in mixed solvents were explained from the formation of intermolecular and intramolecular hydrogen bonds.

关 键 词：SOLUBILITY Octrahydro-1 3 5 7-tetranitro-1 3 5 7-tetrazocine Hexahydro-1 3 5-trinitro-1 3 5-triazine Separation Model Hydrogen bond 

分 类 号：TQ560.72[化学工程—炸药化工]