Method for preparing ethylenediamine esilate

The invention relates to a method for preparing ethylenediamine esilate. The method comprises the steps that glycolonitrile and taurine salt serve as raw materials, or glycolonitrile, taurine and alkali metal hydroxide serve as raw materials, and cyanoethyl taurine salt is obtained through a dehydration condensation reaction; then, under the action of a hydrogenation catalyst, an ethylenediamine esilate hydrogenation solution is obtained through hydrogenation; a solvent is removed, and then the product ethylenediamine esilate is obtained. According to the catalyst, aluminum oxide and/or silicon oxide serve/serves as a carrier, and NiO, CoO, MoO3, MnO2 and Tc2O7 serve as active components. According to the method, ethylenediamine esilate can be obtained with a high conversion rate and high selectivity as long as light components such as the solvent in the hydrogenation solution are removed, the method is environmentally friendly in process, economical, safe and high in product yield, and has the industrialization amplification prospects, and purification is easy.