Manufacture of sodium-free lithium chloride from salt lake brine

摘要

Process assessment experiment was conducted to investigate the applicability of integration technology (CC1, concentration, cooling and ion exchange) to manufacture sodium-free lithium chloride from salt lake brine. The preliminary separation process of sodium from brine, using evaporating concentration by adding surfactant, showed the amount of sodium in brine decreases to below 0.187%. Then, brine was further cooling separation process which was characterized in that the ammonia is added in order to decrease the solubility of NaCl.