重结晶制备奥克托今(HMX)粒径及晶形的研究  

STUDY ON PARTICLE SIZE AND CRYSTAL FORM OF HMX PREPARED BY RE-CRYSTALLIZATION

作　　者：马东旭[1] 梁逸群[1] 张景林[1] 

机构地区：[1]中北大学化工与环境学院,山西太原030051

出　　处：《陕西科技大学学报（自然科学版）》2009年第1期54-57,共4页Journal of Shaanxi University of Science & Technology

摘　　要：采用溶剂-非溶剂重结晶法制备出奥克托今(HMX)并对其粒径及晶形进行了研究,通过单一改变溶剂、温度、溶剂-非溶剂混合速率和搅拌速度研究了HMX重结晶过程中的动力学行为.实验表明:在25℃时,用二甲亚砜(DMSO)作溶剂,非溶剂与溶剂质量比为100∶1,将两者迅速混合所结晶出的HMX晶体平均粒径为462 nm,且其分布均匀呈短柱状团聚;用丙酮作溶剂时,结晶不均匀多呈长条状;用68 wt%硝酸作溶剂时,结晶呈立方块状.The particle size and crystal form of HMX prepared by re-crystallization using solvent-nonsolvent method was studied. The kinetics behaviors of HMX re-crystallization were studied by respectively changing solvents, temperatures, mixture speeds of solvent and nonsolvent and the stirring speed. The experimental results show. when dimethyl sulfoxide is selected as solvent, the mean diameter of HMX is 462 nm and its pattern appears short column crystal aggregate which is acquired at these conditions, temperature keeping at 25 ℃, the weight ratio between solvent and non-solvent is 100 ： 1, and solvent is diluted rapidly; when acetone is used as solvent, the crystal is non-homogeneous and majority appears long strips; while 68 wt% nitric acid as solvent, the crystal appears cube-like blocks.

关 键 词：奥克托今(HMX) 重结晶 溶剂-非溶剂 粒径 晶形 

分 类 号：TQ645.98[化学工程—精细化工] TB383[一般工业技术—材料科学与工程]