| 摘要 |
A process for preparing EDDN and/or EDMN by conversion of FA, HCN and EDA, the reaction being effected in the presence of water, and, after the conversion, water being depleted from the reaction mixture in a distillation column, which comprises performing the distillation in the presence of an organic solvent which has a boiling point between water and EDDN and/or EDMN at the distillation pressure existing in the column or which forms a low-boiling azeotrope with water. |
| 主权项 |
1. A process for preparing ethylenediaminediacetonitrile (EDDN) and/or ethylenediaminemonoacetonitrile (EDMN) which comprises converting formaldehyde (FA), HCN and ethylenediamine (EDA), the conversion being effected in the presence of water, and water being depleted from the reaction mixture in a distillation column after the conversion, which comprises performing the distillation in the presence of an organic solvent which has a boiling point between water and EDDN and/or EDMN at the distillation pressure existing in the column or which forms a low-boiling azeotrope with water, wherein the organic solvent forms a miscibility gap with water, and wherein the organic solvent is cyclohexane, methylcyclohexane, toluene, N-methylmorpholine, o-xylene, m-xylene or p-xylene, anisole, n-pentane, n-hexane, n-heptane, n-octane, n-nonane, diisobutyl ether, light petroleum, petroleum, benzene, diglyme or 2-methyl-THF. |
