摘要
采用测试和回归方程求极限的方法 ,得出温度87~95℃ ,终点NH32mol/L的条件下 ,5(NH4)2O·12WO3·5H2O的平衡溶解度。5(NH4)2O·12WO3·5H2O的溶解度与温度(t)的线性关系为 :y= -588.08+7.28t,其与终点NH3 浓度(mol/L)的线性关系为 :y=36.76+18.86x。中国离子交换法所产5(NH4)2O·12WO3·5H2O溶解度较低 ,其可能原因是晶体中的Si含量较低 ,而NH4Cl含量较高 ,以及由于结晶过程NH4Cl的大量存在 ,水的活度较低 ,致使结晶产物中存在少量溶解度较低的5(NH4)
In the condition of temperature range is 87~95℃, end point is NH3 2mol/L, the equilibrium solubility of 5(NH4)2O·12WO3·5H2O is gained by applying test method and limit process of regression equation. The linear relationship between the solubility of 5(NH4)2O·12WO3·5H2O and the temperature is : y=36.76+18.86x. The solubility of 5(NH4)2O·12WO3·5H2O is low after ion_exchanging, the probable reasons are: low content Si in crystal, high content NH4Cl in crystal and low activity water. These reasons bring about the production of little low solubility 5(NH4)2O·12WO3·7H2O in crystalline grain.
出处
《中国钨业》
CAS
2001年第3期18-21,共4页
China Tungsten Industry