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SM ISO690:2012 TINCU, Robert, SLABU, Andrei, MAGANU, Maria, DRAGHICI, Constantin C., DULDNER, Monica, COMAN, Alina, BARTHA, Emeric. Pet wastes recycling using various glycols and metal containing ionic liquids. In: Achievements and perspectives of modern chemistry, 9-11 octombrie 2019, Chişinău. Chisinau, Republic of Moldova: Tipografia Academiei de Ştiinţe a Moldovei, 2019, p. 58. ISBN 978-9975-62-428-2. |
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Achievements and perspectives of modern chemistry 2019 | |
Conferința "International Conference "Achievements and perspectives of modern chemistry"" Chişinău, Moldova, 9-11 octombrie 2019 | |
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Pag. 58-58 | |
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Poly(ethylene terephthalate), also known as PET, is one of the major postconsumer waste, being non-biodegradable [1]. Present methods for PET recycling are divided into physical methods and chemical methods. However, chemical recycling of PET is the most attractive and widely studied, due to the final product quality. Glycolysis is the simplest, oldest, and least capital-intensive process. Glycolysis is, usually, carried out using ethylene glycol to produce bis(2-hydroxyethyl)terephthalate and other PET glycolyzates, which can be used to manufacture unsaturated resins, polyurethane foams, copolyesters, acrylic coatings and hydrophobic dyes [2]. Being a transesterification reaction, the classical catalysts needed for PET glycolysis are inorganic salts (metal halides). The alternative to the metal-catalyzed glycolytic depolymerization is given by the organic superbases (TBD, DBU, DBN) and ionic liquids catalysts which are intensively studied lately [3]. In the present work, our aim is to perform PET wastes glycolysis reaction using other glycols than ethylene glycol, using as catalyst metal containing ionic liquids in order to obtain aromatic polyesterpolyols that can be used to manufacture polyurethane foams. The catalyst used are methylimidazolium salts with general formula [Rmim]+MX3-. |
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