METHOD FOR RECOVERING OF WASTE DYEING SOLUTION GENERATED IN THE POLARIZING FILM PREPARATION PROCESS

摘要

PURPOSE: A method for regenerating a waste dyeing solution generated from a polarizer manufacturing process is provided to improve the efficiency of regeneration by effectively eliminating a polyvinyl alcohol resin from the waste dyeing solution based on a boron absorbed resin. CONSTITUTION: Boron is absorbed in an absorbent resin by adding an absorbent resin into a boric acid solution(S110). The boron absorbed resin is separated and is introduced into a waste dyeing solution which is generated from a polarizer manufacturing process(S120, S130). Polyvinyl alcohol is bonded with boron from the boron absorbed resin(S140). The absorbed resin bonded with the polyvinyl alcohol is separated. The dyeing solution is collected(S150). The absorbent resin is at least one selected from a group including a resin containing a glucamine group.