Green composite medium as well as preparation method, application and application method thereof

The invention provides a green composite medium. The composite medium is obtained by mixing and reacting amine, aluminum halide and alcohol at room temperature in an inert atmosphere. The molar ratioof the amine to the aluminum halide to the alcohol is 1: 1.5-3: 10-100, the aluminum halide is one of aluminum trichloride, aluminum tribromide and aluminum triiodide, and the alcohol is one of monohydric alcohol, dihydric alcohol, monohydric mercaptan and dihydric mercaptan. Meanwhile, the invention also provides a preparation method, application and an application method thereof. Compared with atraditional reaction system, the green composite medium provided by the invention has the advantages that the preparation raw materials are easy to obtain, the operation is simple and convenient, thecost is lower, and the stability is better; a green composite medium is adopted as a solvent and a catalyst, efficient degradation of polyester plastic can be completed, reaction conditions are mild,high temperature and high p