METHODS AND APPARATUS FOR CONVERTING METAL CARBONATE SALTS TO METAL HYDROXIDES
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United States of America Patent
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Mar 27, 2025
app pub date -
Jan 20, 2023
filing date -
Jan 20, 2023
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Abstract
Methods and apparatuses for converting metal carbonate salts to metal hydroxides are disclosed. The methods involve electrochemical production of hydrogen ions (H+) for decarbonating the metal carbonate salt to generate metal ions in a chemical compartment of the electrochemical cell. The metal ions are transported to a cathode compartment where they combine with hydroxide (OH−) to form metal hydroxides. The methods and apparatus may be applied to produce calcium hydroxide which may be used as a precursor for cement clinker. In some embodiments electrochemically produced hydrogen and oxygen are burned to produce heat for production of cement clinker.
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