| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a method for recycling a polystyrene foam capable of recycling without degrading the polystyrene foam. SOLUTION: A molded product of polystyrene foam such as a food tray is charged into a volume reducing agent to form a viscous product. The viscous product is charged into a separation apparatus 2 while stirring and to the separation apparatus 2 steam is added through an addition means 23 to evaporate and separate the volume reducing agent and water from the viscous product at a temperature lower than the boiling point of the volume reducing agent by an azeotropic phenomenon. Here, a degradation inhibitor such as benzotriazole or tolyltriazole is added in the steam to prevent molecular weight degradation of the polystyrene by catalysis of metal or metal oxide powder adsorbed to the polystyrene foam.</p> |
