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- W1996536045 abstract "Abstract Phenol production through the direct hydroxylation of benzene with hydrogen peroxide, as oxidant, using a vanadium catalyst in a membrane reactor has been studied. The reaction was carried out in mild condition in a liquid–liquid biphasic system separated by a polypropylene membrane. This system showed high selectivity to phenol, minimizing its over-oxidation to over-oxygenated by-products. The influence of various reaction parameters such as the addition of hydrogen peroxide mode, catalyst and sulphuric acid amounts, temperature and reducing agent effects were investigated. The vanadium catalyst avoided tar formation in all the investigated experimental conditions compared to the previous system where an iron-based catalyst was used. Use of (C5H8O2)2VO as catalyst, 18 mmol of hydrogen peroxide as oxidant pumped for 4 h in the aqueous phase with the step-by-step feeding mode gave the best system performance in terms of yield (63.2%), selectivity to phenol (97.0%), and extraction quotient (76.4%)." @default.
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- W1996536045 date "2012-02-01" @default.
- W1996536045 modified "2023-10-18" @default.
- W1996536045 title "Performance of vanadium based catalyst in a membrane contactor for the benzene hydroxylation to phenol" @default.
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- W1996536045 doi "https://doi.org/10.1016/j.apcata.2011.12.031" @default.
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