Concept

Phenols

Related publications (68)

Benzene Hydroxylation over FeZSM-5 Catalysts: Which Fe-sites Are Active?

FeZSM-5 with a wide range of Fe content (0.015–2.1 wt%) were studied in the benzene hydroxylation to phenol with nitrous oxide (C6H6:N2O = 1:5) at low temperatures (

2004

Highly dispersed gold on activated carbon fibers for low temperature CO oxidation

Philippe Buffat, Lioubov Kiwi, Elena Suvorova Buffat

Gold nanoparticles of 2–5 nm supported on woven fabrics of activated carbon fibers (ACF) were effective during CO oxidation at room temperature. To obtain a high metal dispersion, Au was deposited on ACF from aqueous solution of ethylenediamine complex [Au ...

2004

Bleaching and photobleaching of Orange II within seconds by the oxone/Co2+ reagent in Fenton-like processes

Albert Renken, Juan Kiwi, Javier Fernandez

Accelerated bleaching, photobleaching and mineralization of the non-biodegradable azo-dye, Orange II, was obsd. with oxone in solns. with Co2+-ions. The bleaching rate of Orange II in the dark was found to follow a first-order kinetics with respect to [Co2 ...

2004

Structural properties and photoreactivity relationships of substituted phenols in TiO2 suspensions

César Pulgarin, Sandra Parra Cardona

The reactivity of phenolic compounds can be drastically affected by the electronic nature of substituents and by their positions in the aromatic ring. In this work, structure effect on the photoreactivity via TiO2 catalysis is studied using several substit ...

2003

Catalytic oxidation of toluene with molecular oxygen over Cr-substituted mesoporous materials

Albert Renken, Benoît Louis, Fabio Rainone

Syntheses of thermally stable chromium-incorporating hexagonal mesoporous aluminophosphate and cubic Cr-MCM-48 were reported. Characterization of the catalysts was made using low angle XRD, N2 adsorption, UV-VISDRS, thermal anal., ICP-AES and ESR. Mesoporo ...

2003

Chlorination of phenols: Kinetics and formation of chloroform

Urs von Gunten

The kinetics of chlorination of several phenolic compounds and the corresponding formation of chloroform were investigated at room temperature. For the chlorination of phenolic compounds, second-order kinetics was observed, first-order in chlorine, and fir ...

2002

Hydroxylation of phenol over M-MCM-48

Albert Renken, Benoît Louis

The synthesis and characterization of M-MCM-48 (M = Si, Ti, V, Cr, and Mn) materials have been carried out. These systems promote hydroxylation of phenol with 30% H2O2 and the hydroxylation activity is highest for Ti-MCM-48. Water appears to be a better so ...

2001

Fluorophenols and (trifluoromethyl)phenols as substrates of site-selective metalation reactions: to protect or not to protect

O-Methoxymethyl (MOM) protected fluorophenols can be cleanly metalated and subsequently be submitted to site-selective electrophilic substitution. The 2- and 4-isomers exhibit ambivalent reactivity: deprotonation occurs at the position adjacent to the O wh ...

2001

New structured beds formed by zeolites deposited on metallic and ceramic supports

Albert Renken, Lioubov Kiwi, Benoît Louis

The title bed is developed with in situ cryst. growth of zeolite ZSM-5 on different supports; metallic grids and glass fibers. The materials are characterized by diverse physicochem. methods. The chem. pretreatment of the support is a crucial parameter for ...

2001

Translocation of copper in an alpine chronosequence by phenolic-type vectors

Repeated applications of Cu for phytosanitary treatments of vineyards and orchards have contributed to a considerable increase of Cu levels in soils over the last decades. Therefore the risk of migration and Cu contamination of the groundwater and the drin ...

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