Method for treating solution containing silver, thiosulfuric acid and impurities, method for recovering thiosulfate, and method for leaching silver

摘要

PROBLEM TO BE SOLVED: To effectively remove impurities included in a post-treatment liquid using thiosulfuric acid without the decomposition of thiosulfate.SOLUTION: The present invention provides a method to purify thiosulfuric acid complex salt from a solution comprising impurities and comprising ions of nonferrous metal and thiosulfuric acid, the method including the steps of adding sodium salt to the solution, recovering a deposit generated therefrom, and dissolving the recovered deposit in water.SELECTED DRAWING: None