| 摘要 |
PURPOSE:To obtain a methylated amine compound having high discoloration resistance, low occurrence of discoloration with time, and excellent storage stability, by methylating an amine compound in the presence of a hydrogenation catalyst, and heating the reaction liquid in the presence of an alkaline metal salt. CONSTITUTION:An amine compound having at least one active haydrogen atom (e.g. ethylamine, N-amino-ethylpiperazine, etc.) is methylated in the presence of a hydrogenation catalyst (e.g. Raney-Ni, Pt, etc.) by conventional reducing methylation process. The reaction liquid obtained by the methylation reaction is incorporated with an alkaline metal salt (e.g. sodium haydroxide, potassium hydroxide, etc.) and heat-treated at 30-200 deg.C, preferably 60-150 deg.C to obtain the objective compound. USE:Useful as a synthetic intermediate of agricultural chemicals and pharmaceuticals, foaming catalyst for polyurethane, hardener for epoxy resin, etc. |
