主要阐述了原料羟基乙腈、氨水或液氨在合成亚氨基二乙腈的过程中,分别预热以及预热温度对亚氨基二乙腈的收率、产品纯度的影响,以及原料分别预热的重要性。 Mainly describes the raw material hydroxyacetonitrile, ammonia or liquid ammonia in the process of iminodiacetonitrile, respectively, preheating and preheating temperature on the yield of iminodiacetonitrile, product purity, as well as the importance of raw materials were preheated .