普钙-脲-水复合肥料体系的等温溶度研究  

Studies on the Isothermal Solubility of the Systems CaSO_4- Ca(H_2PO_4)_2-CO (NH_2)_2-H_2O and Ca (H_2PO_4)_2-CO (NH_2)_2-H_2O at 25℃

作　　者：张逢星[1] 杨琴[1] 崔斌[1] 赵晓利 段朝阳 

机构地区：[1]西北大学化学系,西安710069

出　　处：《物理化学学报》2000年第1期27-30,共4页Acta Physico-Chimica Sinica

基　　金：陕西省教委专向科研基金

摘　　要：从发展复合肥料出发，研究了ＣａＳＯ４Ｃａ（Ｈ２ＰＯ４）２－Ｈ２Ｏ体系及其三元边界体系Ｃａ（Ｈ２ＰＯ４）２－ＣＯ（ＮＨ２）２Ｈ２Ｏ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．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,.

关 键 词：相平衡 溶解度 复合肥料 脲 磷酸二氢钙 

分 类 号：O642.542[理学—物理化学]