METHOD FOR MANUFACTURING CARBONATE

摘要

Methods are disclosed for manufacturing magnesium carbonate and calcium carbonate, specifically manufacturing refined carbonates such as magnesium carbonate (MgCO3) and calcium carbonate (CaCO3) through processes including electrolysis, carbon dioxide injection, and calcium oxide (CaO) or calcium hydroxide (Ca(OH)2) injection in seawater.

主权项

1. A method for manufacturing carbonate, comprising:
adding calcium oxide (CaO) to sea water solution to produce magnesium hydroxide (Mg(OH)2; performing a first separation of the sea water solution to a supernatant portion, and a lower portion liquid, wherein the lower portion liquid comprises magnesium hydroxide (Mg(OH)2); producing magnesium carbonate by adding carbon dioxide (CO2) in the lower portion liquid; electrolyzing the sodium chloride (NaCl) contained in the supernatant portion to produce sodium hydroxide (NaOH) and hydrogen chloride (HCl); adding sodium hydroxide (NaOH) obtained from the electrolyzing step into the supernatant portion to produce calcium hydroxide (Ca(OH)2); performing a second separation of the supernatant portion to an upper portion liquid and a second lower portion liquid, the second lower portion liquid comprising calcium hydroxide (Ca(OH)2); and adding carbon dioxide (CO2) in the second lower portion liquid in S6 to produce calcium carbonate (CaCO3).