عنوان مقاله [English]
Abstract: The great amount of polyethylene terephthalate based disposable products and releasing of them as waste plastic materials in nature come up serious environmental concerns. The mechanical recycling of these materials to use some polyester based products only cover a small fraction waste. As a suitable alternative, the chemical recycling provides methods to remove PET from environment, produces the high value added materials, returns them to the production processes in accordance with the principles of sustainable development of ecosystems, and creates job and research opportunities.
Several chemical recycling methods such as alcoholysis, aminolysis, glycolysis have been explored and and numerous researches to find suitable degrading materials, produce the applicable material, find ecofriendly catalysts, economically operating conditions have been performed. Despite the remarkable number of researches on the different methods chemical recycling studies, there are still a few industrial or even semi-industrial chemical recovery plants and very little information is available about them.
This current article briefly reviews the different chemical recycling methods applied in PET recycling field, the relative importance and economical issues of each method, materials and products, and the operation conditions.
Keywords: Poly Ethylene Terephthalate (PET), Chemical Recycling, Glycolysis, Hydrolysis, Aminolysis