1 results about "Ruthenium tetroxide" patented technology

The application discloses an extraction method for extracting platinum group metals, and relates to the technical field of precious metal recovery; the extraction method comprises the following steps: taking a platinum group metal concentrate for pretreatment, slurring the pretreated platinum group metal concentrate by using a sodium chlorate solution with a concentration of 0.8-1.2 mol / L, controlling the solid-liquid ratio of the slurring system to be 1:3-1:5 (g / mL), stirring the slurring system at a stirring speed of 150-200 r / min and a temperature of 25-35 DEG C for 20-30 min, and obtaining a uniform slurring liquid; the slurring liquid obtained in the step S1 is transferred into a distillation reactor, heated to 90-95 DEG C and kept, and dilute sulfuric acid with a concentration of 1-3 mol / L is slowly added at a rate of 10-20 mL / min; S3, the temperature in the distillation reactor is kept at 90-95 DEG C, and the distillation is continuously stirred for 2.0 h under normal pressure, and the volatilized osmium and ruthenium tetroxide are collected through a tail gas absorption device during the distillation; the technical scheme provided by the application can effectively improve the recovery efficiency and recovery rate of ruthenium and osmium in the platinum group metal ore.