CATALYST ARRANGEMENT WITH OPTIMIZED VOID FRACTION FOR THE PRODUCTION OF PHTHALIC ACID ANHYDRIDE

CATALYST ARRANGEMENT WITH OPTIMIZED VOID FRACTION FOR THE PRODUCTION OF PHTHALIC ACID ANHYDRIDE

The invention relates to a catalyst arrangement for preparing phthalic anhydride by gas-phase oxidation of aromatic hydrocarbons, which comprises a reactor having a gas inlet end for a feed gas and a gas outlet end for a product gas and also a first catalyst zone made up of catalyst bodies and at le...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: SCHINKE, PETER, RICHTER, OLIVER, LESSER, DAVID, MESTL, GERHARD, FROMM, NADINE, SCHULZ, FELIX, MARX, ROBERT, PITSCHI, WERNER
Format: Patent
Sprache:eng ; fre ; ger
Schlagworte:
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
HETEROCYCLIC COMPOUNDS
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 a catalyst arrangement for preparing phthalic anhydride by gas-phase oxidation of aromatic hydrocarbons, which comprises a reactor having a gas inlet end for a feed gas and a gas outlet end for a product gas and also a first catalyst zone made up of catalyst bodies and at least one second catalyst zone made up of catalyst bodies, where the first catalyst zone is arranged at the gas inlet end and the second catalyst zone is arranged downstream of the first catalyst zone in the gas flow direction and the length of the first catalyst zone in the gas flow direction is less than the length of the second catalyst zone in the gas flow direction, characterized in that the first catalyst zone has a higher gap content compared to the second catalyst zone.