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 selectively eliminate a polyvinyl alcohol resin from a waste dyeing solution using clay. CONSTITUTION: Clay is introduced into a waste dyeing solution generated from a polarizer manufacturing process(S120). A polyvinyl alcohol resin from the waste dyeing solution is selectively absorbed to the clay. The polyvinyl alcohol resin absorbed clay is separated, and a dyeing solution is collected(S130, S140). The clay is at least one selected from phyllosilicates or inverted ribbons. The layered structure of the clay includes silica layers of tetrahedral structures and aluminum layers of octahedral structures.