Process for preparing N,N-dimethylamines

The present invention relates to a process for the preparation of N,N-dimethylamines by reaction of an aldehyde with dimethylamine and hydrogen under pressure and at elevated temperature in the presence of a hydrogenation catalyst containing Ni, Co, Cu, Mn, Fe, Rh, Pd and/or Pt. After separating off...

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Bibliographic Details
Main Authors KNIEP, CLAUS, LUKAS, RAINER, KAMPMANN, DETLEF
Format Patent
LanguageEnglish
French
German
Published 27.04.1994
Edition5
Subjects
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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Summary:The present invention relates to a process for the preparation of N,N-dimethylamines by reaction of an aldehyde with dimethylamine and hydrogen under pressure and at elevated temperature in the presence of a hydrogenation catalyst containing Ni, Co, Cu, Mn, Fe, Rh, Pd and/or Pt. After separating off unconverted dimethylamine and excess hydrogen, formaldehyde or a formaldehyde-forming substance is added, and distillation is carried out.
Bibliography:Application Number: EP19900123912