During the purification process of wet-process phosphoric acid(WPA) by solvent extraction,the colored organic impurities in WPA would act on the solvent and affect the extraction process accordingly.

• 在采用溶剂萃取法净化磷酸的过程中,湿法磷酸中的有色杂质会与萃取剂作用,影响萃取过程,因此有必要在萃取前对其进行脱色处理,去除其中的有机杂质。