Oleksandr S. Ivashchuk , Wolodymyr Ya. Suprun , Volodymyr M. Atamanyuk , Volodymyr S. Kurhanskyi , Andriy O. Nahurskyi , Roman A. Chyzhovych
{"title":"Depolymerization of rigid polyurethane waste by catalytic glycolysis with diethylene glycol","authors":"Oleksandr S. Ivashchuk , Wolodymyr Ya. Suprun , Volodymyr M. Atamanyuk , Volodymyr S. Kurhanskyi , Andriy O. Nahurskyi , Roman A. Chyzhovych","doi":"10.1016/j.sajce.2025.01.009","DOIUrl":null,"url":null,"abstract":"<div><div>Glycolysis of rigid polyurethane (PU) waste has been investigated to check the possibility of the recycling of polyol from industrial furniture production. The glycolysis reaction was performed at a constant temperature. Diethylene glycol and sodium acetate were used as the solvent and catalyst, respectively. The recovered polyols were characterized by hydroxyl value (HV), dynamic viscosity, and FTIR (Fourier-transform infrared spectroscopy) spectroscopy. The HV of glycolysis products was about 200–800 mg KOH g<sup>-1</sup>. The HV depends on the applied DEG:PU mass ratio and on the reaction's time. The glycolysis product containing recovered polyols was directly used without purification for further PU synthesis. The recovered PU materials were investigated using TGA (thermogravimetric analysis) and SEM (scanning electron microscopy) microscopy.</div></div>","PeriodicalId":21926,"journal":{"name":"South African Journal of Chemical Engineering","volume":"52 ","pages":"Pages 61-67"},"PeriodicalIF":0.0000,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"South African Journal of Chemical Engineering","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1026918525000095","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"2025/1/17 0:00:00","PubModel":"Epub","JCR":"Q1","JCRName":"Social Sciences","Score":null,"Total":0}
引用次数: 0
Abstract
Glycolysis of rigid polyurethane (PU) waste has been investigated to check the possibility of the recycling of polyol from industrial furniture production. The glycolysis reaction was performed at a constant temperature. Diethylene glycol and sodium acetate were used as the solvent and catalyst, respectively. The recovered polyols were characterized by hydroxyl value (HV), dynamic viscosity, and FTIR (Fourier-transform infrared spectroscopy) spectroscopy. The HV of glycolysis products was about 200–800 mg KOH g-1. The HV depends on the applied DEG:PU mass ratio and on the reaction's time. The glycolysis product containing recovered polyols was directly used without purification for further PU synthesis. The recovered PU materials were investigated using TGA (thermogravimetric analysis) and SEM (scanning electron microscopy) microscopy.
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The journal has a particular interest in publishing papers on the unique issues facing chemical engineering taking place in countries that are rich in resources but face specific technical and societal challenges, which require detailed knowledge of local conditions to address. Core topic areas are: Environmental process engineering • treatment and handling of waste and pollutants • the abatement of pollution, environmental process control • cleaner technologies • waste minimization • environmental chemical engineering • water treatment Reaction Engineering • modelling and simulation of reactors • transport phenomena within reacting systems • fluidization technology • reactor design Separation technologies • classic separations • novel separations Process and materials synthesis • novel synthesis of materials or processes, including but not limited to nanotechnology, ceramics, etc. Metallurgical process engineering and coal technology • novel developments related to the minerals beneficiation industry • coal technology Chemical engineering education • guides to good practice • novel approaches to learning • education beyond university.
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