| 摘要 |
PURPOSE:To obtain the titled compound tertiary amine useful as a corrosion inhibitor, etc. in high yield, purity and quality, by methylating a specific amine under specific conditions in the presence of a specific hydrogenation catalyst while adding hydrogen and formaldehyde continuously to the reaction system. CONSTITUTION:An amine of the formula (R<1> is 8-24C straight chain or branched chain alkyl or alkenyl; R<2> and R<3> are H, 8-24C straight chain or branched chain alkyl or alkeyl; m is 0 or an integer 1-5; n is 2 or 3; either one of R<2> and R<3> is H when m is 0) is methylated with H and formaldehyde to give a tertiary amine. In the process, a hydrogenation catalyst obtained by supporting 0.1- 10wt% Co, Ni, Rh, Pd or Pt on a powdery or granular carbon in an amount of 5-5,000ppm based on the amine of the formula expressed in terms of the catalyst metal concentration is added to the amine, and the reaction is carried out at 80-250 deg.C reaction temperature under >=2kg/cm<2> hydrogen pressure (gauge pressure) while adding formaldehyde continuously to the reaction system. |
