Fremgangsmåde til oxidation af benzen og/eller toluen til phenol og/eller cresoler

The invention relates to the field of organic synthesis, more specifically to a method for the production of phenol and cresol by the direct selective oxidation of benzene and toluene with nitrous oxide in the presence of a heterogeneous catalyst. Commercial high-silica zeolites are first calcined a...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	KUSTOV, LEONID MODESTOVICH, TRYLOV, ALEKSANDR ARUNOVICH, TARASOV, ANDREI LEONIDOVICH, BOGDAN, VIKTOR IGNATYEVICH
Format:	Patent
Sprache:	dan
Schlagworte:	ACYCLIC OR CARBOCYCLIC COMPOUNDS APPARATUS THEREFOR CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY CHEMISTRY GENERAL METHODS OF ORGANIC CHEMISTRY METALLURGY ORGANIC CHEMISTRY PERFORMING OPERATIONS PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL THEIR RELEVANT APPARATUS TRANSPORTING
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Beschreibung
Zusammenfassung:	The invention relates to the field of organic synthesis, more specifically to a method for the production of phenol and cresol by the direct selective oxidation of benzene and toluene with nitrous oxide in the presence of a heterogeneous catalyst. Commercial high-silica zeolites are first calcined at a temperature of 500-950° C. sufficient to dehydroxylate it. It is then modified by the addition of modifying agents-zinc ions or zinc oxide-by applying a zinc compound to it. The catalyst is then activated in air or an inert gas at 300-850° C. The mixture of benzene or toluene with the nitrous oxide is brought into contact with the modified catalyst at 225 to 500° C.