The recovering method of the valuable metal from the waste acid containing the valuable metal and organic solvent and the recycling method of the waste acid

摘要

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for recovering valuable metals from wastes containing valuable metals and organic solvents and a method for regenerating spent acids. More specifically, the present invention relates to a method for recovering valuable metals from wastes containing valuable metals and organic solvents And a method for regenerating waste acids, wherein a basic substance is added to a waste acid containing a valuable metal and an organic solvent to adjust the pH to 1 to 6, and then a hydrophobic phosphorus extraction agent and a hydrophobic solvent are added to extract the valuable metal , A precious metal extraction step; A step of separating the crude metal extraction liquid from the waste acid; Recovering the valuable metal by concentrating and reducing the separated crude metal extraction liquid; Removing the organic matter in the waste acid by adding an oxidizing agent and a catalyst to the remaining waste acid after the separation of the crude metal extraction solution to perform an elevated oxidation reaction; And removing the impurities in the waste acid, wherein the pH of the waste acid from which the organic matter has been removed is adjusted to 2 to 10, and then the impurities precipitated in the waste acid are removed. And recovering the spent metal from the spent acid.