Light Metals Symposium held at the TMS Annual Meeting and Exhibition, TMS 2023, California, United States Of America, 19 - 23 March 2023, pp.867-872
Tetra Pak packages which are multi-layered composite materials (approximately 75% cardboard-cellulose, 20% LDPE and 5% Al by weight) facilitate the distribution of particular food products and aid to preserve some food properties for a long time. In this study, experiments were proceeded to separation of the layers of Tetra Pak aseptic packages efficiently from each other and their recycling. Hydropulping process were carried out for the separation of the celluloses part which is paper for this material; then, hydrometallurgical and pyrometallurgical treatments were followed through for partition of polyethylene and aluminum (PEAl) fractions from each other. In hydrometallurgical pathway, PEAl samples were put in vegetable oil, observed according to increasing temperature, time and solid/liquid ratio parameters, at the end the LDPE and Al phases were purified. The pyrometallurgical studies (pyrolysis) were carried out with various time and temperature combinations, and efficiency of Al recovery from PEAL fraction were investigated.