Method for preparing liquid containing metallic ions by employing extraction reaction

The invention relates to a method for preparing liquid containing metallic ions by employing extraction reaction; in the method, amine extractant is used for extracting the metallic ions in the liquid, thus obtaining metallic amine ion liquid as well as realizing the clean separation of metallic ions and the direct preparation of the functional ion liquid. In the whole preparation process in the method, no organic solvent is used, causing no harm to the environment. In addition, the prepared liquid containing metallic ions can be used as an absorber for acidic gas and a catalyst for alkylation. The loaded organic phase obtained by extraction in the method is the prepared liquid containing metallic ions, therefore, the method omits the step of back extraction of metallic ions, simplifies the process, which results in low cost and little energy consumption, and reduces environment pollution caused by acid in the back extraction process.