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›› 2009, Vol. 9 ›› Issue (1): 74-78.

• 系统与集成 • 上一篇    下一篇

15℃时NaCl-CO(NH2)2-H2O2-H2O四元体系相平衡

张朝 郭康宁 曹吉林   

  1. 河北工业大学化工学院 河北工业大学化工学院 河北工业大学化工学院
  • 收稿日期:2008-10-07 修回日期:2008-11-17 出版日期:2009-02-20 发布日期:2009-02-20
  • 通讯作者: 曹吉林

Phase Equilibrium of Quaternary NaCl-CO(NH2)2-H2O2-H2O System at 15℃

ZHANG Chao GUO Kang-ning CAO Ji-lin   

  1. School of Chemical Engineering and Technology, Hebei University of Technology Chemical Engineering School, Hebei University of Technology Chemical Engineering School, Hebei University of Technology
  • Received:2008-10-07 Revised:2008-11-17 Online:2009-02-20 Published:2009-02-20
  • Contact: CAO Ji-lin

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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.

关键词: 过氧化尿素, 氯化钠, 过氧化氢, 相平衡, 加合物

Abstract: 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-CO(NH2)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. NaCl did not have salting effect on the formation of urea peroxide in the system.

Key words: urea peroxide, sodium chloride, hydrogen peroxide, phase equilibrium, additive

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