| abstract |
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. |