发明公开
EP2961731A1 VERFAHREN ZUR HERSTELLUNG VON EDA UNTER VERWENDUNG VON SO2-FREIER BLAUSÄURE 有权
用于生产EDA使用SO2免费BLUE ACID

VERFAHREN ZUR HERSTELLUNG VON EDA UNTER VERWENDUNG VON SO2-FREIER BLAUSÄURE
摘要:
The invention relates to a method for producing ethylene diamine (EDA), wherein the method comprises the steps a) to c). In step a), formaldehyde is converted with hydrocyanic acid (HCN) to formaldehyde-cyanohydrine (FACH), wherein the hydrocyanic acid is completely free or extensively free of sulfur dioxide (SO
2 ). The FACH thus produced is converted in step b) with ammonia (NH
3 ) to aminoacetone-nitrile (AAN), and, in step c), hydrogenation of AAN to EDA occurs in the presence of a catalyst.
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