摘要
为了改进过氧化尿素合成的生产工艺,采用等温法测定了15℃时NaCl-CO(NH2)2-H2O2-H2O四元体系及其三元子体系CO(NH2)2-H2O2-H2O和NaCl-CO(NH2)2-H2O的相平衡数据,依据所绘相图分析,结合热重和XRD表征,得出实验条件下NaCl和尿素能形成新的加合物CO(NH2)2-NaCl,其热稳定性比纯尿素高.根据相图计算,15℃时CO(NH2)2-H2O2-H2O体系合成过氧化尿素的适宜条件范围较宽,在母液不利用的情况下H2O2的收率为58.08%;而在NaCl-CO(NH2)2-H2O2-H2O体系中,NaCl对过氧化尿素形成没有盐析效应.
In order to improve the synthesis production process of urea peroxide, the phase equilibrium data of quaternary NaCl-CO（NH2）2-H2O2-H2O system and its subsidiary system of CO（NH2）2-H2O2-H2O and NaCl-COCNH2）2-H2O were measured at 15℃ by means of isotherm. The results of phase diagram analysis, thermogravimetry and X-ray diffraction indicated that sodium chloride and urea additive could form in this system, and the additive thermal stability was better than CO（NH2）2. The phase diagram calculation of ternary CO（NH2）2-H2O2-H2O system at 15℃ showed that the suitable conditions of urea peroxide synthesized from ternary CO（NH2）2-H2O2-H2O had a broad range, and sodium chloride had no influence on the formation of urea peroxide in the quaternary system. The yield of hydrogen peroxide was 58.08% if remaining solution was not used. NaCI did not have salting effect on the formation of urea peroxide in the system.
出处
《过程工程学报》
CAS
CSCD
北大核心
2009年第1期74-78,共5页
The Chinese Journal of Process Engineering
基金
国家自然科学基金资助项目(编号:20676025)
河北省自然科学基金资助项目(编号:B2008000033)
关键词
过氧化尿素
氯化钠
过氧化氢
相平衡
加合物
urea peroxide
sodium chloride
hydrogen peroxide
phase equilibrium
additive
