title: Glycolysis recycling of rigid waste polyurethane foam from refrigerators.
abstract: Rapid growth of rigid waste polyurethane (WPUR) foam from refrigerators attracts the attention all over the world. In this study, glycolysis was chosen to treat WPUR from scrapped refrigerators collected in Shanghai, China. Glycolysis reagents and catalysts were selected. The results indicated that the glycolysis efficiency of ethylene glycol (EG) was higher than that of diethylene glycol, and the catalytic efficiency of alkali metal salts (NaOH) was more excellent than that of triethanolamine and organic salts of alkali metal (NaAc). When EG was 100%WPUR as a glycolysis reagent and NaOH was 1%WPUR as a catalyst at a constant temperature of 197.85°C for 2 h, the glycolysis product had the highest glycolysis conversion rate. In order to maximize the recycling of WPUR, regenerative Polyurethane was performed by adding 10% distilled mixed polyol, which conformed to the QB/T 26689-2011 requirements.
authors.affiliation: a College of Environmental and Chemical Engineering , Shanghai University , 99 Shangda Road, Shanghai 200444 , People's Republic of China.
authors.forename: P
authors.initials: P
authors.lastname: Zhu
authors.forename: Z B
authors.initials: ZB
authors.lastname: Cao
authors.forename: Y
authors.initials: Y
authors.lastname: Chen
authors.forename: X J
authors.initials: XJ
authors.lastname: Zhang
authors.forename: G R
authors.initials: GR
authors.lastname: Qian
authors.forename: Y L
authors.initials: YL
authors.lastname: Chu
authors.forename: M
authors.initials: M
authors.lastname: Zhou
mesh_terms: D002384:Catalysis; D019245:Compressive Strength; D004983:Ethanolamines / Q000737:chemistry; D005026:Ethylene Glycols / Q000737:chemistry; D006019:Glycolysis; D006794:Household Articles; D011140:Polyurethanes; D059027:Recycling / Q000379:methods*; D019346:Sodium Acetate / Q000737:chemistry; D012972:Sodium Hydroxide / Q000737:chemistry; D013814:Thermal Conductivity; D014783:Viscosity; D014866:Waste Products
chemical_list: D004983:Ethanolamines; D005026:Ethylene Glycols; D011140:Polyurethanes; D014866:Waste Products; D019346:Sodium Acetate; D012972:Sodium Hydroxide; C013484:diethylene glycol; C028279:polyurethane foam; C009546:triethanolamine
keywords: glycolysis condition; glycolysis regents; regeneration; rigid waste polyurethane foam; scrapped refrigerators