ELECTROCHEMICAL PRODUCTION OF ALKALI METAL HYDROXIDES AND SULFURIC ACID FROM BATTERY MANUFACTURING AND RECYCLING OUTLET STREAMS
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United States of America Patent
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Apr 11, 2024
app pub date -
Sep 22, 2023
filing date -
Sep 22, 2022
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Abstract
Methods of producing sodium hydroxide (NaOH) or lithium hydroxide (LiOH), and sulfuric acid (H2SO4), include generating sodium sulfate (Na2SO4) or lithium sulfate (Li2SO4) from battery manufacturing and recycling and converting the generated Na2SO4 or Li2SO4 to NaOH, LiOH, and H2SO4 via an electrochemical salt-splitting process. The processing steps can be carried out in a closed system such that the generated Na2SO4 or Li2SO4 can be used in the conversion process with optional purification steps. In particular, the LiOH, NaOH, and Na2SO4 are recycled into battery recycling or battery manufacturing processes.
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