Ionic liquids as Efficient Catalysts for The Glycolysis of Polyethylene Terephthalate | ||||
| Egyptian Journal of Chemistry | ||||
| Article 2, Volume 57, Issue 4, August 2014, Page 267-280 PDF (805.15 K) | ||||
| DOI: 10.21608/ejchem.2014.1045 | ||||
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| Abstract | ||||
| THE GLYCOLYSIS of polyethylene terephthalate (PET) was …… studied using several ionic liquids as catalysts. The Lewis base ionic liquid, 1-butyl-3-methylimidazolium acetate [Bmim][OAc], exhibits higher catalytic activity for the glycolysis of PET, compared with 1-butyl-3 methylimidazolium chloride ([Bmim]Cl) and 1-butyl-3-methylimidazolium bromide ([Bmim]Br). The results revealed that the [Bmim][OAc] has a PET conversion of 75.1% and bis (2-hydroxyethyl) terephthalate (BHET) yield of 46.4% under the conditions of 1.0 g of [Bmim] [OAc] with 20 g of ethylene glycol in the presence of 2.0 g of PET at 180ºC after 2 hr of glycolysis. The main glycolysis product (BHET) was analyzed using XRD, NMR, EI-MS, FTIR, TGA and DSC. | ||||
| Keywords | ||||
| Catalysis; Ionic liquid; Glycolysis; Polyethylene terephthalate and Recycling | ||||
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