结晶法从湿法磷酸生产焦磷酸钠的研究

STUDY ON THE PREPARATION OF SODIUM PYROPHOSPHATE FROM WET-PROCESS PHOSPHORIC ACID BY CRYSTALLIZATION METHOD.

采用二次旋转响应表面实验设计研究了三聚氰胺复盐结晶法从湿法磷酸生产焦磷酸钠过程中反应温度、反应时间的一次、二次及其交互作用对三聚氰胺磷酸焦化过程中焦化率及中和过程中中和速率的影响。分别得到了以焦化率和中和率为指标，反应温度、反应时间为变量的二次回归数学模型。并利用所得模型求得焦化时的焦化率和中和率适宜的处理条件。

The effects of reaction temperature and time on coking and neutralization rates in the preparation of sodium pyrophosphate are studied by twice response experimental design method.The math model for coking and neutralization process are established.Accordingly,the optimum conditions for both above process are obtained.