Lithium recovery device using separator reservoir, lithium recovery method and lithium adsorption/desorption system using the same

A lithium adsorption and desorption system comprising:

• a reaction section including a sealed separator reservoir having an outer wall with a porous structure and a cavity surrounded by the outer wall, and a lithium-manganese oxide formed into a lithium-manganese oxide powder compact, which is provided in the cavity of the separator reservoir, wherein the outer wall has the size of a pore of 0.1 μm to 10 μm and has chemical resistance and mechanical strength, and wherein the reaction section performs steps of allowing the lithium-manganese oxide to be reacted with an acidic solution to extract lithium ions, thereby producing a manganese oxide serving as an ion-sieve type lithium adsorbent, and of allowing the produced manganese oxide to be reacted with seawater to adsorb lithium ions dissolved in the seawater, and then allowing the lithium ions-adsorbed manganese oxide to be reacted with an acidic solution to desorb the adsorbed lithium ions;
• a supply section supplying the acidic solution to the reaction section when the production of the manganese oxide and the desorption of the lithium ions are carried out in the reaction section, and supplying the seawater to the reaction section when the adsorption of the lithium ions dissolved in the seawater is carried out in the reaction section;
• a recovery section recovering the lithium adsorbed in the reaction section;
• a discharge section discharging the seawater in which the lithium ions were adsorbed on the manganese oxide in the reaction section;
• and
• a controller controlling the flow of a solution between the reaction section, the supply section, the recovery section and the discharge section.