湿法磷酸净化除铁的现状

The Current Situation of Iron removal from Wet- Process Phosphoric Acid(WPA)

以净化湿法磷酸代替热法磷酸生产磷酸盐已成为近代发展趋势。为了扩大湿法磷酸的应用领域必须净化湿法磷酸中的杂质。从湿法磷酸中分离铁,已经开发了沉淀法、离子交换法、吸附法、溶剂萃取法、膜分离法等方法,各有利弊。

Purifing wet-phosphoric acid instead of the manufacture of phosphoric acid by the thermal proces has become the modern development trend.In order to expand the application field of phosphoric acid,we must purify impurities in phosphoric acid.Iron removal from the WPA,has developed some suitable purification methods ,such as precipitation,ion-exchange,adsorption,solvent extraction,membrane technologies and so on.Each has its own advantages and disadvantages.