Method for improving hue of recycled ethylene glycol terephthalate by using ionic liquid

The invention discloses a method for improving the hue of recycled ethylene glycol terephthalate by using an ionic liquid. The method comprises the following steps: providing a recycled polyester fabric; performing chemical depolymerization on the recycled polyester fabric by using a chemical depolymerization solution to form a depolymerization product; mixing the depolymerized product with water to form an aqueous phase liquid; dispersing an ionic liquid impurity adsorption material in the aqueous phase liquid to adsorb impurities originally existing in the recycled polyester fabric; the method disclosed by the invention has the effect of efficiently removing impurities. 本发明公开一种利用离子液体改善回收型对苯二甲酸乙二醇酯色相的方法，其包括：提供一回收聚酯织物；利用一化学解聚液对所述回收聚酯织物进行化学解聚，以形成一解聚产物；将所述解聚产物与水混和，以形成一水相液体；将一离子液体杂质吸附材料分散于所述水相液体中，以吸附原本存在于所述回收聚酯织物中的杂质；本发明公开的方法具有高效率去除杂质之效果。