| 摘要 |
The invention relates to a method for producing N,N-substituted- 1,3-propandiamine by a) reacting secondary amines with acrolein at a temperature between (-50) - 100°C and at a pressure between 0,01 - 300 bar, and b) reacting the reaction mixture obtained in step a) with hydrogen and ammonia in the presence of a hydrogenation catalyst at a temperature between 40 - 400°C and at a pressure of 1 - 400 bar. The invention is characterised in that in step a) the molar ratio of secondary amines to acrolein is 2:1 or more and the hydrogenation catalyst used in step b) contains cobalt. In a preferred embodiment, acrolein that is obtained from glycerin based on renewable raw material is used. The invention also relates to the use of a N,N-dimethyl-1,3-propandiamine (DMAPA) based on renewable raw material as charge material for soft soaps and other detergents, coagulation agents, polymers and comb polymers. In another preferred embodiment, step b) takes place in the presence of water. |
