METHOD OF PREPARING CYCLIC LACTAMS

METHOD OF PREPARING CYCLIC LACTAMS

FIELD: chemical industry. SUBSTANCE: cyclic lactams are prepared by hydrolysis of aliphatic aminocarboxylic acid nitriles in liquid phase in reactor with fixed heterogeneous catalyst bed which contains no components soluble under process working conditions. The claimed method uses aminocarboxylic ac...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: EHBERKHARD FUKS, TOM VITTSEL
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
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Beschreibung
Zusammenfassung:FIELD: chemical industry. SUBSTANCE: cyclic lactams are prepared by hydrolysis of aliphatic aminocarboxylic acid nitriles in liquid phase in reactor with fixed heterogeneous catalyst bed which contains no components soluble under process working conditions. The claimed method uses aminocarboxylic acid nitrile solution having concentration of 1-50 wt % in water or in admixture of water with organic solvent. Caprolactam is prepared from nitrile -6-aminocarboxylic acid. EFFECT: separation of catalyst from liquid reaction products is made easier, catalyst consumption is decreased and yield of final product is increased. 5 cl, 27 ex, 4 tbld