Two-step synthesis method of ruthenium nitrosyl nitrate

The invention discloses a two-step synthesis method of ruthenium nitrosyl nitrate, and belongs to the field of synthesis of ruthenium nitrosyl nitrate. The method comprises the following steps of: taking ruthenium as a raw material, obtaining a ruthenium nitrosyl nitrate solution by two steps of nitric acid absorption by oxidative distillation and nitrosylation of gas, and obtaining a ruthenium nitrosyl nitrate solution or crystal required by customers by rotary evaporation, wherein the product reaches the YS/T 755-2011 standard. The method provided by the method not only solves the problems that the ruthenium nitrosyl nitrate prepared by the traditional method carries a large number of impurity elements and the process flow is complicated and the like, but also has the advantages of short process, simple operation, low energy consumption and the like, and is suitable for industrial production.