物理化学学报 >> 2000, Vol. 16 >> Issue (01): 27-30.doi: 10.3866/PKU.WHXB20000106

研究论文 上一篇    下一篇

普钙-脲-水复合肥料体系的等温溶度研究

张逢星, 杨琴, 崔斌, 赵晓利, 段朝阳   

  1. 西北大学化学系,西安 710069
  • 收稿日期:1999-03-23 修回日期:1999-06-03 发布日期:2000-01-15
  • 通讯作者: 张逢星

Studies on the lsothermal Solubility of the Systems CaSO4-Ca(H2PO4)-CO(NH2)2-H2O and Ca(H2PO4)2-CO(NH2)2-H2O at 25°C

Zhang Feng-Xing, Yang Qin, Cui Bin, Zhao Xiao-Li, Duan Chao-Yang   

  1. Department of Chemistry ,Northwest University,Xi'An 710069
  • Received:1999-03-23 Revised:1999-06-03 Published:2000-01-15
  • Contact: Zhang Feng-Xing

摘要:

从发展复合肥料出发,研究了CaSO4-Ca (H2PO4 ) 2-H2O体系及其三元边界体系Ca(H2PO4 )2-CO(NH2 )2-H2O 在25℃时的等温溶度. 三元体系中形成一个新化合物Ca(H2PO4)2• CO(NH2 )2.四元体系溶度图可以指导商品普钙磷肥转化为含脲络合复肥.

关键词: 相平衡, 溶解度, 复合肥料, 硫酸钙, 脲, 磷酸二氢钙

Abstract:

The titled quaternary system CaSO4-Ca (H2PO4 ) 2 - C O (NH2 ) 2 -H2O and its ternary boundary system Ca(H2PO4 )2-CO(NH2 )2-H2O have been investigated at 25℃ in order to develop complex fertilizer. One new compound Ca(H2PO4)2•CO (NH2)2 was found in the ternary system. There were two complex compounds Ca(H2PO4)2• CO(NH2 )2 and CaSO4• 4CO(NH2 )2.

Key words: Phase equilibrium, Solubility, Complex fertilizer, Urea, Calcium sulfate, Calcium phosphate