Patent ID: 8691176

Claim:
A method of producing carbonate mineral, comprising: preparing a first aqueous solution by passing an ion exchange solution through a fluid path in which a cation exchange medium containing calcium or magnesium is disposed; adding the first aqueous solution containing Ca 2+ or Mg 2+ extracted from the cation exchange medium by a cation exchange reaction and carbon dioxide to a second aqueous solution in which precipitation reaction of a carbonate occurs to form a carbonate mineral; and separating the carbonate mineral from the second aqueous solution, wherein the ion exchange solution comprises an aqueous solution containing sodium ions which extract the calcium ion or the magnesium ion from the cation exchange medium by the cation exchange reaction, wherein the aqueous solution of the ion exchange solution further comprises chloride ions, and wherein the second aqueous solution comprises a sodium hydroxide aqueous solution, and the second aqueous solution from which the carbonate mineral has been separated is used as the ion exchange solution.