湿法磷酸制备食品添加剂磷酸氢二钠的结晶条件控制研究

Study on control of crystal condition of manufacture of food additive named disodium hydrogen phosphate with wet-process phosphoric acid

由于湿法磷酸的来源不同,其含有的杂质非常复杂,本文研究在以湿法磷酸为原料制备食品添加剂磷酸氢二钠的过程中,不同的结晶方法和条件对磷酸氢二钠纯度的影响。

Because wet-process phosphoric acid （WPA） origin is different,the impurity is extremely complex. Using WPA as raw material, the effect of different crystallization method and condition on sodium hydrogen phosphate purity was studied during the manufacture process of sodium hydrogen phosphate.