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A convenient one-pot−two-step process for chemical recycling of waste PET to produce terephthalohydroxamic acid (TPHA) and terephthalohydrazide (TPHD) was proposed. Decomposition of PET pellets to the corresponding oligomeric mixture in boiling ethylene glycol, followed by its treatment with hydroxylamine and hydrazine at room temperature in 1 h, produced >90% overall yields of TPHA and TPHD, respectively.
Yamaye et al. (Tue,) studied this question.