Research on the Resourceful and Efficient Recycling Technology of Waste Thermal Insulation Pipe Material.

ABSTRACT: This study was conducted to explore a new method for degrading and recycling waste chemical pipe insulation and cooling materials. A chemical degradation method was employed, utilizing alkali metal catalysts and a two-component alcoholysis system consisting of specific ratios of diethylene glycol and butylene glycol. The system effectively degraded the polyisocyanurate (PIR) insulation with the aim of reusing the waste material. The experimental results show that the best reaction performance is obtained with 1,4-BG/DEG ratio of 43:57 at 180 and 190 °C 1 h. The resulting regenerated pipe has an apparent density of 0.041 g/cm³ and a compressive strength of 0.413 MPa. With remarkable thermal stability, well-preserved porosity, and strong skeletal structure, the cold loss on the ou

SUBMITTER: Gu X 

PROVIDER: S-EPMC11983187 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature