PURIFICATION OF ALIPHATIC TRIAMINE COMPOUND

PURPOSE:To obtain purified triamine compound by dissolving crude triamine compound in suitable solvent, converting to tricarbamates and polycarbamates with blowing CO2 gas, separating with utilizing difference of solubility in solvent, eliminating CO2 and eliminating solvent. CONSTITUTION:Crude triamine compound obtained by reduction of tricyano compound with hydrogen, etc., is dissolved in solvent. Next, carbon dioxide is blown into said solution to convert triamine compound to tricarbamate compound, and on the other hand, cyclic secondary amines as impurities are all converted to polycarbamate compound. Then crystal of tricarbamate compound is obtained by utilizing difference of solubilities between said two compounds, thus the crystal is taken out by filtration and subjected to eliminate carbon dioxide and to eliminate solvent to obtain purified triamine compound. The objective highly purified compound is obtained by repetition of said purifying method.