METHOD FOR RECOVERING Ru COMPLEX DYE FROM USED DYE SOLUTION

摘要

The present invention relates to a method for recovering Ru complex dye from a used dye solution containing a polypyridine Ru complex as a Ru complex, the used dye solution having been discharged from a step of manufacturing a dye-sensitized solar cell, the method including the steps of:
(a): filtering the used dye solution to separate and remove solid content.
(b): bringing a separating solvent including an ether-based solvent indicated by a chemical formula C x H (2x+1) -O-C y H (2y+1) (x = 1 to 4 and y = 1 to 4, with the proviso that x + y ‰¥ 4) or an alkane-based solvent indicated by a chemical formula C x H (2x+2) (x = 5 to 7) into contact with the used dye solution to separate the Ru complex dye.