VERFAHREN ZUR HERSTELLUNG VON (EPSILON)-CAPROLACTAM

VERFAHREN ZUR HERSTELLUNG VON (EPSILON)-CAPROLACTAM

Caprolactam is prepared by a process in which (a) the 5-formylvalerate is reacted with excess ammonia and hydrogen in the presence of an alkanol as the solvent and in the presence of a hydrogenation catalyst under superatmospheric pressure in the liquid phase at from 40 DEG to 130 DEG C., (b) excess...

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Bibliographische Detailangaben
Hauptverfasser: PRIESTER,CLAUS-ULRICH,DR, VAGT,UWE,DR, MERGER,FRANZ,DR, FISCHER,ROLF,DR, HUTMACHER,HANS-MARTIN,DR, JOSEF,BROECKER,FRANZ, HARDER,WOLFGANG,DR
Format: Patent
Sprache:ger
Schlagworte:
APPARATUS THEREFOR
CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY
CHEMISTRY
GENERAL METHODS OF ORGANIC CHEMISTRY
HETEROCYCLIC COMPOUNDS
METALLURGY
ORGANIC CHEMISTRY
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
THEIR RELEVANT APPARATUS
TRANSPORTING
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Zusammenfassung:Caprolactam is prepared by a process in which (a) the 5-formylvalerate is reacted with excess ammonia and hydrogen in the presence of an alkanol as the solvent and in the presence of a hydrogenation catalyst under superatmospheric pressure in the liquid phase at from 40 DEG to 130 DEG C., (b) excess ammonia and hydrogen are separated off from the reaction mixture, (c) the resulting reaction mixture is reacted with water at elevated temperatures with simultaneous removal of alkanols, and (d) the reaction mixture thus obtained is heated to 150 DEG -370 DEG C. and epsilon -caprolactam is obtained.