| abstract |
Diethylenetriamine is produced by reacting monoethanolamine with ammonia in the presence of a phosphorus-containing substance and ethylenediamine at a molar ratio of ammonia and monoethanolamine of at least 11:1, preferably in the liquid phase at a temperature of 200 - 400 DEG C and pressure of at least 200 kg/cm<2>G. Excellent selectivity in the production of diethylenetriamine is attained and without substantially consuming the added ethylenediamine. The product diethylenetriamine can be returned to the reaction if polyamines higher than diethylenetriamine should be desired. |