The glycolysis of poly­(ethylene terephthalate) (PET) was studied using 1-butyl-3-methylimidazolium acetate ([Bmim]­[OAc]) as a catalyst. The effects of temperature, time, ethylene glycol dosage, PET amount, and [Bmim]­[OAc] dosage on the glycolysis reaction were examined. The results revealed that [Bmim]­[OAc] has a PET conversion of 100% and a bis­(2-hydroxyethyl)­terephthalate (BHET) yield of 58.2% under the optimum conditions of 1.0 g of [Bmim]­[OAc] with 20 g of ethylene glycol in the presence of 3.0 g of PET at 190 °C after 3 h of glycolysis. The ionic liquid could be reused up to six times with no apparent decrease in the conversion of PET or yield of BHET. The pH plays a major role in explaining the proposed mechanism of glycolysis using the Lewis base ionic liquid [Bmim]­[OAc]. The kinetics of the reaction was first-order with an activation energy of 58.53 kJ/mol.

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The utilization of Fe3O4-boosted MWCNT in PET glycolysis is considered a successful attempt to achieve an efficient procedure.

Selective hydroxylation of benzene is a felicitous strategy for the production of phenol that is deemed an alternative route for conventional processes. Thus, the development of a durable and highly efficient catalyst for the selective hydroxylation of benzene should be the key topic. In this work, FeOCl was prepared by chemical vapor transition method and characterized using various techniques including XRD, TEM, Raman spectroscopy, N 2 adsorption-desorption, DLS and TGA. The prepared FeOCl was applied as heterogeneous catalyst in benzene hydroxylation and the reaction conditions were optimized. The acquired data manifested that FeOCl has shown superiority over the other reported catalysts utilized in benzene hydroxylation. The superiority of FeOCl is attributed to the facile self-redox potential of FeOCl and its remarkable ability for the production of an overwhelming amount of hydroxyl radicals in a short period of time. The catalyst recovery and reusing test showed that FeOCl is able to endure the harsh conditions of benzene hydroxylation for four runs. The mechanism of benzene hydroxylation using FeOCl as a catalyst in the presence of hydrogen peroxide as an oxidant was also illustrated.

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