METHOD FOR COLLECTING LITHIUM IN SEA WATER, CAPABLE OF REMOVING A DIVALENT CATION EXISTING IN A LITHIUM DESORPTION SOLUTION THROUGH A CHEMICAL REFINEMENT PROCESS

摘要

PURPOSE: A method for collecting lithium in sea water is provided to separate an element except lithium effectively by using a chemical refinement process and a separation method using a nanofiltration membrane at a same time.;CONSTITUTION: A method for collecting lithium in sea water comprises the following steps: lithium in sea water is absorbed by using an adsorbent consisting of a manganese oxide; a lithium desorption solution is obtained by a desorption of lithium absorbed in the adsorbent by using an acidic solution; a divalent cation existing in the lithium desorption solution is removed through a chemical refinement process; and the lithium desorption solution in which the divalent cation is removed is separated to a permeated water and an enriched water by circulating a module comprised of a nanofiltration membrane of a spiral type.;COPYRIGHT KIPO 2013;[Reference numerals] (AA) Seawater; (BB) Absorb lithium in the seawater; (CC) Desorption; (DD) Desorption solution; (EE) Enrichment; (FF) Collect hydrochloric acid; (GG) Collect Mn; (HH) Separate divalent ion; (II) Collected Mn (reuse to manufacture an absorbent)