Preparation method of N-nitrosoiminodiacetonitrile

The invention discloses a preparation method of N-nitroiminoaminodiacetonitrile. The method comprises the following steps: controlling the feeding temperature at -5-10 DEG C, adding iminodiacetonitrile and an aqueous sulfuric acid solution having a mass fraction of 15-25% into a reaction container, performing stirring to achieve sufficient dissolving, dropwise adding an aqueous sodium nitrite solution having a mass fraction of 15-30%, carrying out a reaction at a controlled reaction temperature of 10-50 DEG C for 0.5-1.5 h, performing extraction on the obtained reaction mixed solution by usingethyl acetate, and distilling off the solvent to dryness in order to obtain the N-nitrosoiminodiacetonitrile. The method is mainly used for preparing N-nitrosoiminodiacetonitrile. 本发明公开了一种N-亚硝基亚氨基二乙腈的制备方法，包括以下步骤：控制加料温度在-5℃～10℃，向反应容器中加入亚氨基二乙腈和质量分数为15％～25％的硫酸水溶液，搅拌使其充分溶解，再逐滴加入质量分数为15％～30％的亚硝酸钠水溶液，控制反应温度在10℃～50℃反应0.5h～1.5h后，用乙酸乙酯提取反应混合液，蒸干溶剂后得到N-亚硝基亚氨基二乙腈。本发明主要用于N-亚硝基亚氨基二乙腈的制备。