Method of separating mixed solution of ethidene diamine and N-ethylethylenediamine

The invention relates to a method of separating a mixed solution of ethidene diamine and N-ethylethylenediamine and belongs to the technical field of organic compound separation. The method particularly comprises the steps of separating ethidene diamine and N-ethylethylenediamine in an order from partial crystallization to deep crystallization for the mixed solution with a mass fraction less than60%, separating ethidene diamine and N-ethylethylenediamine in an order from the deep crystallization to the partial crystallization for the mixed solution with the mass fraction equal to or greater than 60%, and recycling the residual mixed solution at last. According to the method, yields of ethidene diamine and N-ethylethylenediamine in the mixed solution after freezing crystallization separation can reach 50% or above; the purity can reach 98% or above; and the method is simple to operate, high in efficiency and low in energy consumption and cost. 本发明涉及种分离乙二胺和N-乙基乙二胺混合溶液的方法，属于有机化合物分离技术领域，具体包括对于质量分数小于60%的混合溶液，按先部分结