Selective oxidation of benzene to phenol in the liquid phase with amorphous microporous mixed oxides

Stöckmann, Marion; Konietzni, Frank; Notheis, J.Ulrich; Voß, Jürgen; Keune, W.; Maier, Wilhelm F.

doi:10.1016/s0926-860x(00)00733-x

Cited by 73 publications

(35 citation statements)

References 27 publications

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“…Maier et al [62] have reported on the hydroxylation of benzene with hydrogen peroxide in the presence of amorphous microporous mixed oxides. A mixed oxide containing 3% iron and 0.5% cerium turned out to be one of the most effective catalysts.…”

Section: Direct Hydroxylation Of Aromatic Compoundsmentioning

confidence: 99%

Oxidation and Ammoxidation of Aromatics

Lücke¹,

Narayana²,

Martin³

et al. 2004

Adv Synth Catal

131

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An overview of the state of the art in the direct oxygen or nitrogen insertion to aromatic rings and side-chains by hydroxylation, acetoxylation, partial oxidation and ammoxidation is presented. The influence of a variety of catalysts and oxidants on the yields of hydroxylated products of aromatic species is discussed in more detail. The survey is also focussed on the usage of H 2 O 2 as an effective oxidising agent for hydroxylation reactions. Acetoxylation of methyl-substituted aromatic compounds to their corresponding esters in a single step is indeed an interesting area from an industrial point of view. Hence, the topics covering benzylic acetoxylation, although they are under a developmental stage for commercial exploitation, are also reviewed. The present contribution also covers the main directions of selective oxidation/ammoxidation of aromatic compounds to useful products, surveys recent developments and provides an updated discussion of the state of the art in the field of oxidation and ammoxidation of aromatics. Additionally, a comparative study of the vapour phase oxidation and ammoxidation of different alkyl aromatics to their corresponding aldehydes and nitriles using various heterogeneous catalysts is presented.Besides, the achievements and limitations of the catalysts/processes are emphasised. Furthermore, the present article includes a discussion of common features and differences in mechanistic steps of oxidation and ammoxidation reactions investigated by in situ FITR spectroscopy. The influence of acid-base properties of catalyst surfaces in connection with electronic effects of the substituents on the performance of the catalysts is also described.

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Section: Direct Hydroxylation Of Aromatic Compoundsmentioning

confidence: 99%

Oxidation and Ammoxidation of Aromatics

Lücke¹,

Narayana²,

Martin³

et al. 2004

Adv Synth Catal

131

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“…Toluene is oxidized selectively to benzalaldehyde, when liquid phase oxidation of benzene phenol is catalyzes by Fe 3 Al 3 Si-O x in which Fe act as Active center [128]. And similarly replacement by vanadium result in active catalyst for the selective oxidation of 2-butanol to Ketone [144].…”

Section: Catalystsmentioning

confidence: 99%

Amorphous Porous Mixed Oxides: A New and Highly Versatile Class of Materials

Pandey

Mishra

2012

Intelligent Nanomaterials

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Porous solids are a rapidly developing class of materials with an ever-increasing range of applications. Among these materials, amorphous porous mixed oxides possess the extraordinary properties of fine tuning the chemical composition, microstructure, porosity and surface properties. The tailor made composition of the mixed oxides can be fabricated from the availability of variety of precursor, additives and modifiers. Besides, their performance can be found close to that of crystalline phase. These amorphous mixed oxides can easily be synthesized using acid / base catalyzed one-pot sol-gel procedure. Sol-gel processes allow for a relatively facile tailoring of the morphology of mixed oxides to the desired application in the field of nanotechnology. Pore volume, porosity, specific surface area, and surface acidity are typical parameters that can be tailored. This chapter deals with the preparation methodology, characterization techniques, and application of amorphous porous mixed oxides.

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“…Phenol is one of the most important intermediates in the chemical industry, especially for the manufacture of petrochemicals, agrochemicals, and plastics, e.g., phenol resins, aniline, caprolactam, bisphenol A, epoxy resins, or polycarbonates [1][2][3]. Nearly all its current production is based upon the cumene process, which is also the most important route to produce acetone.…”

Section: Introductionmentioning

confidence: 99%

Transition metal substituted polyoxometalates and their application in the direct hydroxylation of benzene to phenol with hydrogen peroxide

Chen

Zhang

et al. 2010

Res Chem Intermed

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A series of transition metal substituted polyoxometalates with a Keggin structure were prepared and utilized for the hydroxylation of benzene to phenol. Among the compounds tested, [(CH 3 ) 4 N] 4 PMo 11 VO 40 exhibits the highest phenol yield (13.0%) and selectivity (90.6%) in acetic acid/acetonitrile. Vanadium peroxo is the active site of the reaction, and ammonium also plays an important role. The influence of various reaction parameters, such as solvent, reaction time, reaction temperature, and amount of hydrogen peroxide used were investigated to obtain the optimal reaction conditions.

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Selective oxidation of benzene to phenol in the liquid phase with amorphous microporous mixed oxides

Cited by 73 publications

References 27 publications

Oxidation and Ammoxidation of Aromatics

Oxidation and Ammoxidation of Aromatics

Amorphous Porous Mixed Oxides: A New and Highly Versatile Class of Materials

Transition metal substituted polyoxometalates and their application in the direct hydroxylation of benzene to phenol with hydrogen peroxide

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