SYSTEM AND METHOD FOR RECOVERING WASTE POLARIZING PLATE

To provide a system and method for recovering a waste polarizing plate.SOLUTION: There is provided a system for recovering a waste polarizing plate that includes first and second extraction units, first and second separation units, and a purification and concentration system. The system is configured in that: the first extraction unit extracts fragments of a waste polarizing plate containing iodine to obtain an extraction mixture; the first separation unit separates the iodine-containing extract and plastic fragments of the waste polarizing plate; the second extraction unit re-extracts the plastic fragments from the waste polarizing plate to obtain a re-extraction mixture; and the second separation unit separates the re-extraction mixture into a re-extracted liquid and plastic fragments of the waste polarizing plate. A filtration unit of a purification and concentration system 120 filters out a gelatinous material from the iodine-containing extract to obtain an iodine-containing filtrate; a membrane separation unit comprises at least one reverse penetration membrane and receives the iodine-containing filtrate to separate it into an iodine reverse penetration liquid and a penetration solvent; and a distillation concentration unit distills the iodine reverse penetration liquid to obtain an iodine concentrate and a distillate. The re-extracted liquid in the second extraction unit includes the penetration solvent and the distillate.SELECTED DRAWING: Figure 1 【課題】廃偏光板の回収システム及び方法を提供する。【解決手段】廃偏光板回収システムは、第１及び第２抽出ユニット、第１及び第２分離ユニット、及び精製濃縮システムを含む。第１抽出ユニットはヨウ素を含有する廃偏光板の破片を第１分離ユニットでヨウ素含有抽出物および廃偏光板のプラスチック破片に分離し、第２抽出ユニットは廃偏光板のプラスチック破片を再抽出し、第２分離ユニットで再抽出液及び廃偏光板のプラスチック破片に分離する。精製濃縮システム１２０の濾過ユニットは、前記ヨウ素含有抽出物からゼリー状物質を濾過して取り除き、ヨウ素含有濾液を取得し、膜分離ユニットは、少なくとも１つの逆浸透膜を含みヨウ素含有濾液を受け取って、ヨウ素逆浸透液と浸透溶剤に分離し、蒸留濃縮ユニットは、前記ヨウ素逆浸透液を蒸留し、ヨウ素濃縮液及び蒸留液を取得する。第２抽出ユニット中の再抽出溶媒は、前記浸透溶剤および前記蒸留液を含む。【選択図】図１