三元体系MgSO_4-CO(NH_2)_2-H_2O在25℃时的等温溶度研究

A STUDY ON THE ISOTHERMAL SOLUBILITY OF MgSO_ 4CO(NH _2) 2H_ 2O TERNARY SYSTEM AT 25℃

本文报道了三元体系ＭｇＳＯ４－ＣＯ（ＮＨ２）２－Ｈ２Ｏ在２５℃时的等温溶度及其饱和溶液的折光率、密度值测定结果，绘制出相应的溶度图和组成－折光率、组成－密度图。该三元体系内形成一个组成为ＭｇＳＯ４·ＣＯ（ＮＨ２）２·２Ｈ２Ｏ的新相，该相具异成份溶解性，存在区域为：ＭｇＳＯ４２８．７８－２２．６２％；ＣＯ（ＮＨ２）２３０．７１－５０．８０％。对此新相进行了热分析、红外光谱及Ｘ－射线粉末衍射分析等表征。

?MgSO_4CO(NH_2)_ 2H_2O ternary system, as a boundary ternary system of quaternary system K 2SO 4MgSO 4CO(NH 2) 2H 2O, has been investigated by isothermal method at 25℃. Its phase diagram and properties (refraction indices and densities)composition diagrams have been constructed. There is a new ternary solid phase being formed, MgSO 4·CO(NH 2) 2·2H 2O, which is incongruently. The compositions of the two eutonic points are 28.78, 22.62 %wt. for MgSO 4; 30.71, 50.80 %wt. for CO(NH 2) 2. The compound has been studied by IR, TGA and Xray diffraction. [WT5”,6HZ]