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Liquid-phase Oxidation of Benzene under Ambient Conditions

DOI: 10.1039/P29900001991

Source and publish data:

Journal of the Chemical Society. Perkin transactions II p. 1991 - 1995 (1990)

Update date:2022-08-24

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Authors:

Kitano, TomoyukiKitano, Tomoyuki

Kuroda, YasushiKuroda, Yasushi

Itoh, AkikazuItoh, Akikazu

Li-Fen, JianLi-Fen, Jian

Kunai, AtsutakaKunai, Atsutaka

Sasaki, KazuoSasaki, Kazuo

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Article abstract of DOI:10.1039/P29900001991

Oxidation of benzene on silica-supported palladium catalysts has been studied under ambient conditions.Products are phenol and three quinones/quinols (benzoquinone, hydroquinone and catechol), with some minor products produced in negligible amount.Two types of catalyst, Pd alone and Cu-Pd composite catalysts, both being supported on silica gel, were found to behave in remarkably different ways.The palladium catalyst is effective only when hydrogen and oxygen are both present in the reaction sytem simultaneously and produces phenol almost exclusively -1 cat. h-1 in benzene (100 cm3) and the selectivity >90percent>.On the other hand, the selectivity shifts towards quinones when the Cu-Pd composite catalyst is used (selectivity for quinones: 28percent).The effects of various factors, such as temperature, feeding mode of reaction gases and catalyst composition including moisture content are discussed.

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