Using paraffin amine as dissolvent and kerosene as diluent for the purification and defluorination of wet process phosphoric acid by solvent extraction was studied.

• 为对湿法磷酸进行净化脱氟，用胺类溶剂作萃取剂，煤油作稀释剂，对湿法磷酸进行了溶剂萃取脱氟的工艺研究。