Method for separating and recovering aluminum plastic paper composite packaging material

This patent relates to a method for separating and recovering aluminum-plastic paper composite packaging material and a stripping agent thereof, which mainly utilizes an acidic solution containing nitric acid to impregnate the aluminum-plastic paper composite packaging material, and joins the aluminum-plastic composite packaging material. The aluminum oxide layer is separated and dissolved to separate the plastic material layer or the paper material layer from the aluminum layer in the aluminum-plastic paper composite packaging material, so as to facilitate recycling of various useful materials such as aluminum foil, plastic or paper stock, respectively. .