Method for removing Fe impurities in Pr by using amide pod ether type extraction agent

• Main Authors: ZHANG YAN, CUI YU, HAN JIXUN
• Format: Patent
• Language: Chinese; English
• Published: 13.06.2017
• Subjects: CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention relates to a method for removing Fe impurities in metal Pr by using a solvent extraction method, provides a method for removing the Fe impurities in the Pr by using an amide pod ether type extraction agent, and belongs to the technical field of solvent extraction of Pr ions. In an aqueous solution with the Pr ions and Fe ions, concentrated nitric acid is added into the aqueous solution to prepare a water phase with a certain nitric acid concentration, then the water phase and an organic phase containing the amide pod ether type extraction agent and an N, N'-dibutyl lauramide phase-adjusting agent are mixed and stand for splitting the phases, back extraction is carried out on the extracted organic phase, the extraction-back extraction step is carried out on the extracted water phase repeatedly, and finally the Pr with small Fe content can be obtained. The method has the advantages that the Fe removal effect is good, the yield of the Pr is high, and automatic control is easy. 本发明提供了种使用酰胺荚醚类萃取剂去除Pr