摘要
为解决硝硫混酸法合成1,2-丙二醇二硝酸酯(PGDN)过程中存在的环境污染问题,提出了N2O5硝化环氧丙烷(PO)制备1,2-丙二醇二硝酸酯的方法,该反应原子经济性高,环境友好。研究了原料滴加顺序、原料配比、反应温度、溶剂等因素对反应收率和选择性的影响。结果表明,将PO滴至N2O5/有机溶剂,N2O5与PO的摩尔比1.1∶1.0,反应温度15℃,溶剂采用CH2C l2为最佳反应条件;1,2-丙二醇二硝酸酯的收率达96.3%,选择性接近100%。
In order to solve the environmental pollution of synthesizing 1,2-propylene glycol dinitrate （PGDN） with propylene oxide（PO） as raw material and the mixture of nitric acid and sulfuric acid as nitrating agent, a new method for preparation of PGDN by nitrating PO with dinitrogen pentoxide（N2O5） as a clean nitrating agent was presented. This reaction is environmental friendly with high atomic economy. Effects of the drip order, molar ratio of N2O5 to PO, reaction temperature and solvents on the yield and selectivity of PGDN were studied. The results show that the optimum reaction conditions are： dropping the PO into the solution of N2O5/organic solvent, the molar ratio of N2O5 to PO above 1. 1 ：1.0,the reaction temperature 15℃ and dichloromethane as solvent. Under the above optimum conditions, the yield of PGDN is about 96.3% , and the selectivity is nearly 100G.
出处
《火炸药学报》
EI
CAS
CSCD
2007年第2期75-77,共3页
Chinese Journal of Explosives & Propellants
关键词
应用化学
1
2-丙二醇二硝酸酯
绿色合成
N2O5
硝化反应
applied chemistry
1, 2-propylene glycol dinitrate
green synthesis
dinitrogen pentoxide
nitrating reaction
