PROCESS FOR PREPARING ALPHA, BETA-MONOETHYLENICALLY UNSATURATED ALDEHYDES, CARBOXYLIC ACIDS OR NITRILES, WHICH CONTAIN FROM 3 TO 5 CARBON ATOMS

PROCESS FOR PREPARING ALPHA, BETA-MONOETHYLENICALLY UNSATURATED ALDEHYDES, CARBOXYLIC ACIDS OR NITRILES, WHICH CONTAIN FROM 3 TO 5 CARBON ATOMS

Process for the preparation of alpha , beta -monoethylenic unsaturated aldehydes, carboxylic acids or nitriles containing 3 to 5 C atoms by catalytic gas phase oxidation or ammoxidation of a reduced form of the desired compound in a multitube fixed-bed reactor charged with catalytically active multi...

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Bibliographische Detailangaben
Hauptverfasser: NEUMANN HANS-PETER DR, HERZOG KLAUS DR
Format: Patent
Sprache:eng
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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Zusammenfassung:Process for the preparation of alpha , beta -monoethylenic unsaturated aldehydes, carboxylic acids or nitriles containing 3 to 5 C atoms by catalytic gas phase oxidation or ammoxidation of a reduced form of the desired compound in a multitube fixed-bed reactor charged with catalytically active multimetal oxides, in which the volume-specific activity of the catalytic charge decreases abruptly, successively, stepwise and/or continuously along the contact tubes in the flow direction.