| 摘要 |
PURPOSE:To obtain a high-quality ethylenediamine such as diethylenetriamine in good selectivity by making ethylenediamine exist from the beginning of reaction and reacting ethylene glycol with ammonia in the presence of a phosphorus-containing substance. CONSTITUTION:Ethylenediamine is made to exist from the beginning of reaction and ethylene glycol(EG) is reacted with ammonia in a molar ratio of ammonia/EG of >=2, especially 30-50 in the presence of a phosphorus-containing substance, preferably dihydrogenphosphate, dihydrogenpyrophosphate, phosphoric acid, pyrophosphoric acid or phosphorous acid at 200-400 deg.C, preferably 250-300 deg.C under 1-1,000kg/cm<2>G, preferably 200-500kg/cm<2>G pressure to give an ethyleneamine. The amount of ethylenediamine added is 0.01-10mol, preferably 0.3-1mol based on 1mol EG. |
