Kinetics research on rhenium of the waste platinum-rhenium catalyst under pressure oxygen leaching

Experimental material was the waste platinum-rhenium catalyst; the kinetics of rhenium in PT rhenium catalyst failed by pressure oxygen leaching was studied. The effects of leaching pressure, temperature, sulfuric acid acidity, stirring speed and particle size on the kinetics of rhenium leaching were investigated in this paper. The results showed that sulfuric acid, leaching temperature, leaching pressure and particle size had a significant effect on the leaching rate of rhenium; the chemical reaction control model can well describe the rhenium gas liquid-solid reaction process in the waste platinum-rhenium catalyst for pressure oxygen leaching. In the experimental range, the apparent activation energy is determined to be 42.96kJ/mol, which is in agreement with the chemical reaction control model.