| The properties of platinum and rhenium in spent platinum-rhenium catalysts are similar and they are difficult to separate. Sodium carbonate pressure leaching was used to selectively separate rhenium from spent catalysts. The influence of leaching conditions on the leaching efficiency of rhenium was studied. When the leaching conditions were as follows: 160℃ of reaction temperature, 150 mins of reaction time, 8% leaching agent amount of the material, 500 r/min of stirring speed, 4:1 of liquid-solid ratio, and 0.5 MPa of reaction pressure, the leaching rate of rhenium was 98.5%, and the platinum was almost insoluble and remained in the slag, thus realizing the separation of platinum and rhenium. |
