METHOD FOR REMOVING FLUORINE IN WASTE LITHIUM BATTERIES
The present invention belongs to the technical field of processing waste lithium batteries, and disclosed is a method for removing fluorine from waste lithium batteries. The method comprises the following steps: adding an oxidizing agent and a first acid to waste lithium battery powder to perform ox...
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Main Authors | , , , , , |
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Format | Patent |
Language | Chinese English French |
Published |
06.04.2023
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Subjects | |
Online Access | Get full text |
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Summary: | The present invention belongs to the technical field of processing waste lithium batteries, and disclosed is a method for removing fluorine from waste lithium batteries. The method comprises the following steps: adding an oxidizing agent and a first acid to waste lithium battery powder to perform oxidation and acid leaching as well as solid-liquid separation to obtain a fluorine-containing purification liquid; adding aluminum hydroxide to the fluorine-containing purification liquid to perform a precipitation reaction, adding an acid to adjust the pH, and performing solid-liquid separation to obtain a defluorinated liquid and sodium hexafluoroaluminate; adding aluminum hydroxide to the defluorinated liquid to perform a secondary precipitation reaction, adding an acid to adjust the pH, performing solid-liquid separation, collecting the liquid phase for extraction and obtaining a nickel cobalt manganese sulfate solution. In the present invention, after oxidation and leaching of waste lithium batteries by using a |
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Bibliography: | Application Number: WO2022CN90071 |