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 Catalytic effects of metal iv phosphates on the oxidation of phenol and 2-naphthol
Please use this identifier to cite or link to this item http://hdl.handle.net/10773/6755

title: Catalytic effects of metal iv phosphates on the oxidation of phenol and 2-naphthol
authors: Rocha, GMSRO
Johnstone, RAW
Neves, MGPMS
keywords: Tetravalent metal phosphates
catalysis
hydroxylation reactions
hydrogen peroxide
issue date: 2002
publisher: Elsevier
abstract: Tetravalent metal phosphates form highly insoluble inorganic polymers and act as catalysts in some oxidative reactions. In the present work, a-amorphous zirconium, tin, titanium, zirconium tungstate (acidic and basic form), crystalline vanadyl, fibrous crystalline cerium and pellicular zirconium phosphates, were prepared and evaluated as catalysts, for the hydroxylation of phenol and 2-naphthol by hydrogen peroxide, in acetic acid. Oxidation of phenol yielded hydroquinone, catechol, cis,cis-muconic and cis,trans-muconic acids, depending on the catalyst. All oxidations of 2-naphthol produced 4-(2-hydroxy-1-naphthyl)-1,2-naphthoquinone but reaction with crystalline vanadyl phosphate also resulted in the formation of 1,1'-bi(2-naphthol). (C) 2002 Elsevier Science B.V. All rights reserved.
URI: http://hdl.handle.net/10773/6755
ISSN: 1381-1169
publisher version/DOI: http://dx.doi.org/10.1016/S1381-1169(02)00064-X
source: Journal of Molecular Catalysis A: Chemical
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