Method for recycling lithium batteries
AssigneeDuesenfeld GmbH
InventorsChristian Hanisch, Tobias Elwert, Lisa Brückner
Life of this patent
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Abstract
A method for recycling lithium batteries containing the steps: (a) digesting comminuted material (10), which contains comminuted components of electrodes of lithium batteries, using concentrated sulphuric acid (12) at a digestion temperature (TA) of at least 100° C., in particular at least 140° C., so that waste gas (14) and a digestion material (16) are produced, (b) discharging the waste gas (14) and (c) wet chemical extraction of at least one metallic component of the digestion material (16).
Claims21
A method for recycling lithium batteries, comprising:
- digesting a comminuted material containing comminuted components of electrodes of lithium batteries using concentrated sulphuric acid,
- wherein the comminuted material is not pyrometallurgically treated prior to digesting with concentrated sulphuric acid,
- wherein digesting is performed such that a waste gas and a digestion material are produced,
- discharging the waste gas, and
- performing wet chemical extraction of at least one metallic component of the digestion material,
- wherein the communited material contains fluoride components and wherein the digestion is conducted such that fluoride components in the comminuted material pass into the waste gas as gaseous fluorine compounds.
A method for recycling lithium batteries containing:
- digesting comminuted material, which contains comminuted components of electrodes of lithium batteries, using concentrated sulphuric acid, so that waste gas and a digestion material are produced,
- wherein the comminuted material is not calcinated or combusted prior to digesting with concentrated sulphuric acid,
- discharging the waste gas and
- performing wet chemical extraction of at least one metallic component of the digestion material,
- wherein the communited material contains fluoride components and wherein the digestion is conducted until a concentration of water-soluble fluoride in the digestion material is lower than 100 mg/kg.
Dependencies are inferred from the claim text.