The hydrolysis of poly(ethylene terephthalate) (PET) was studied using ionic liquid 1-n-butyl-3-methylimidazolium chloride ([Bmim] C and time 4.5 h, the conversion of PET and the yield of terephthalic acid (TPA) were almost 100% and !88%, respectively. After easily separated from the product, the ionic liquids could be reused eight times without obvious decrease in the conversion of PET and yield of TPA. Hence, an environmental friendly strategy for chemical recycling of PET was developed.

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