DRAW SOLUTION USING HYDROPHILIC AND IONIC LIGUID IN FORWARD OSMOSIS

摘要

PURPOSE: A forward osmosis process using a hydrophilic ionic liquid as an induction solution is provided to improve the efficiency of a forward osmosis process and to easily collect used induction solutions of high concentration. CONSTITUTION: A forward osmosis process includes the following steps; a forward osmosis process is conducted by using a hydrophilic ionic liquid as an induction solution and by supplying introducing water; the water introduced into the hydrophilic ionic liquid is pressurized for mixing with a coolant, and a hydrophilic ionic liquid layer and a water layer are obtained by phase separation; and the water layer is extracted and undergoes a reverse osmosis process in order to obtain purified water. The hydrophilic ionic liquid is one selected from a group composed of imidazoliums, ammoniums, cholines, phosphoniums, sulfoniums, pyrinidiums, and pyrazoliums.