Study of Chemical Recycling of Poly (ethylene terephthalate) Waste

Chemical recycling of Poly (ethylene terephthalate), PET wastage has been investigated in this work. The aim of this work is terephthalic acid and ethylene glycols recovery from PET waste. This process has been done in two stages. First stage was reaction of PET waste with sodium hydroxide that produced ethylene glycol and sodium terephthalate solution and second stage was reaction of obtained sodium terephthalate with hydrochloric acid that led to terephthalic acid production. Variables such as operational temperatures and pressures, and quantity of consuming sodium hydroxide and hydrochloric acid have been studied. The needful quantities of sodium hydroxide and hydrochloric acid were achieved 50gr and 166gr per 1kg of PET waste, respectively. Operational temperature and pressure was achieved 180 oC and 1.5bar in the first stage respectively.

کلیدواژه ها:

poly (ethylene terephthalate) ، terephthalic acid ، ethylene glycol ، chemical recycling