Patent ID: 9169125
Filing Date: 2015-10-27
Classification: C01D,C01P

Abstract:
1. A method for producing high-purity lithium carbonate from a brine wherein a content of magnesium ions and a content of sulfate ions in the brine are 20 times higher and 26 times higher than a content of lithium ions, respectively, the method comprising the steps of: removing magnesium and boron from the brine using calcium hydroxide (Ca(OH) separating and removing remaining magnesium and calcium in the brine using sodium oxalate (Na concentrating a resulting brine, which is obtained after the removing magnesium and boron step, and the separating and removing remaining magnesium and calcium step, by spray drying to form a powder; washing the powder to concentrate lithium in liquid; and carbonating lithium ions in the liquid with sodium carbonate (Na