Defluorination extraction agent and method for deeply removing fluorine from acidic sulfate solution

The invention discloses a fluorine removal extractant and a method for deeply removing fluorine from an acidic sulfate solution. The method comprises the following steps: adding a modifier and a diluent into the fluorine removal extractant to form an organic phase; carrying out single-stage or multi-stage counter-current extraction by using the organic phase and an acidic fluorine-containing sulfate solution to obtain a fluorine-loaded organic phase and a fluorine-removed raffinate; wherein the fluorine removal extraction agent comprises a cation exchange group and a neutral molecule complexing group. The method provided by the invention can achieve the purpose of deep defluorination. 本发明公开一种除氟萃取剂以及从酸性硫酸盐溶液中深度除氟的方法，其向除氟萃取剂中添加改质剂和稀释剂组成有机相；用有机相与酸性含氟硫酸盐溶液进行单级或多级逆流萃取，得到负载氟的有机相和除氟后的萃余液；其中，所述除氟萃取剂包含阳离子交换基团，以及中性分子络合基团。本发明提出的方法可以达到深度除氟的目的。