RECYCLING PROCESS FOR EXPANDED POLYSTYRENE WASTES
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United States of America Patent
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Jan 25, 2018
app pub date -
Jul 22, 2016
filing date -
Jul 22, 2016
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Abstract
Disclosed is an environmentally friendly recycling process for expanded polystyrene (EPS) wastes using dissolution process and supercritical CO2 extraction process. The recycling process may enable condensing an expanded polystyrene (EPS) by dissolving the EPS into a solvent and one or more additives thereby obtaining an expanded polystyrene (EPS) solution. The recycling process may further enable purifying the EPS solution using at least one of a filtration process and a separation process in order to obtain a purified expanded polystyrene (EPS) solution. Further, the recycling process may further enable extracting the polystyrene from the solvent in the purified expanded polystyrene (EPS) solution using a supercritical CO2 extraction method in order to obtain a recycled polystyrene. The recycling process enables in significant reduction of the volume of EPS thereby saving the logistical cost as well as facilitating increase in quantity, quality and purity of the recycled polystyrene.
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