PROCESS FOR THE PREPARATION OF TERTIARY N,N- DIMETHYLAMINES

A process for the preparation of tertiary N,N-dimethylamines by the reaction of primary amines, formaldehyde, and hydrogen under pressure and at elevated temperature in the presence of a nickel-containing hydrogenation catalyst in the liquid phase. The hydrogenation catalyst is suspended in a solven...

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Bibliographic Details
Main Authors KNIEP, CLAUS, WEBER, JUERGEN, KAMPMANN, DETLEF
Format Patent
LanguageEnglish
French
Published 02.11.1993
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:A process for the preparation of tertiary N,N-dimethylamines by the reaction of primary amines, formaldehyde, and hydrogen under pressure and at elevated temperature in the presence of a nickel-containing hydrogenation catalyst in the liquid phase. The hydrogenation catalyst is suspended in a solvent, the nickel concentration is 0.1 to 10% by weight, based on the primary amine. The starting materials are separate from each other, brought to 80.degree. to 150.degree.C and 1 to 15 MPa and fed into the catalyst suspension simultaneously with stirring and reacted in one step to form the tertiary N,N-dimethylamines.
Bibliography:Application Number: CA19880585321