Verfahren zur Herstellung von epsilon-Caprolactam

The invention concerns a two-step process for the synthesis of caprolactam by reaction of cyclohexanone-oxime with an excess of oleum, carried out in a first step with only a portion of the oxime and in the presence of liquid SO2, according to usual "cold" techniques, the amount of free SO...

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Bibliographic Details
Main Authors TONTI, SERGIO., I-30173 MESTRE VENEZIA, IT, GERVASUTTI, VITTORIO, I-30174 MESTRE VENEZIA, IT, CELLINI, FRANCESCO, I-30038 SPINEA VENEZIA, IT, TANCORRA, RAFFAELE, I-30121 VENEZIA, IT
Format Patent
LanguageGerman
Published 10.11.1994
Edition5
Subjects
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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Summary:The invention concerns a two-step process for the synthesis of caprolactam by reaction of cyclohexanone-oxime with an excess of oleum, carried out in a first step with only a portion of the oxime and in the presence of liquid SO2, according to usual "cold" techniques, the amount of free SO3 in the oleum being equal to or greater than 50% by weight, wherein said "cold" step is completed by a second "hot" step, by adding a second portion of oxime, the ratio between said second portion and said first portion ranging from 0.5 to 1.2:1.
Bibliography:Application Number: DE19883850424T