Preparation method of regenerated polymer

The invention provides a preparation method of a regenerated polymer, which comprises the following steps: contacting a recycled polymer containing an additive with an impregnation solvent in an impregnation tank to obtain slurry containing a swelling polymer and a dissolution solution; separating the slurry into a solid mixture containing the swelling polymer and a liquid mixture containing the eluate in a solid-liquid separator; and obtaining a recovered polymer from the solid mixture and recovering the additive from the liquid mixture, in which the impregnating solvent is a mixed solvent in which two or more solvents are mixed. 本发明提供了一种再生聚合物的制备方法，所述方法包括：使含有添加剂的回收聚合物与浸渍槽中的浸渍溶剂接触，得到含有溶胀聚合物和溶出液的浆料；在固液分离器中将所述浆料分离成含有所述溶胀聚合物的固体混合物和含有所述溶出液的液体混合物；以及从所述固体混合物中获得回收聚合物并从所述液体混合物中回收所述添加剂，其中，所述浸渍溶剂是混合有两种以上溶剂的混合溶剂。