In the process of copper -molybdenum separation is sometimes used reactive phosphorus pentasulfide P2S5 as copper depressant , which causes pollution problems in the final match molybdenite concentrates . The further processing that is performed to these concentrates to produce molybdenum trioxide , produces an increase in the concentration of this element in the final product of 0.05% by hampering commercialization. Due to the above, a study was conducted to hydrometallurgical laboratory scale aimed at finding the optimum conditions of the present process to remove phosphorus so that the content in the molybdenite concentrate is less than 0.04% . The study contemplated a sulfuric acid leaching environment, under different experimental conditions , which were able to remove about 51 % of the phosphorus present in the molybdenite concentrate , lowering the phosphorus content less than 0.0...

The chemical stability of two reagent extractants for copper, one without modifier (LIX 860N-IC) and the other containing a low viscosity modifier was studied. During 103 days the organic solutions (35% v/v in Shellsol 2046 AR diluent) were contacted with aqueous solutions containing 35 g/l copper, 180 and 290 g/l of sulfuric acid, respectively, working at two different conditions of temperature (25 and 45 °C). For both cases a negative effect of increased temperature and concentration of sulfuric acid was found. This effect begins to display from the day 50. For the aldoxime without modifier the extraction isotherms and maximum load were deteriorate and the formation of aldehyde in all cases from day 53. For the aldoxime with low viscosity modifier was possible to see a slight deterioration in the metallurgical performance in relation with the initial condition from the day 53. For mor...

The chemical stability of two reagent extractants for copper, one without modifier (LIX 860N-IC) and the other containing a low viscosity modifier was studied. During 103 days the organic solutions (35% v/v in Shellsol 2046 AR diluent) were contacted with aqueous solutions containing 35 g/l copper, 180 and 290 g/l of sulfuric acid, respectively, working at two different conditions of temperature (25 and 45 °C). For both cases a negative effect of increased temperature and concentration of sulfuric acid was found. This effect begins to display from the day 50. For the aldoxime without modifier the extraction isotherms and maximum load were deteriorate and the formation of aldehyde in all cases from day 53. For the aldoxime with low viscosity modifier was possible to see a slight deterioration in the metallurgical performance in relation with the initial condition from the day 53. For mor...

In the process of copper -molybdenum separation is sometimes used reactive phosphorus pentasulfide P2S5 as copper depressant , which causes pollution problems in the final match molybdenite concentrates . The further processing that is performed to these concentrates to produce molybdenum trioxide , produces an increase in the concentration of this element in the final product of 0.05% by hampering commercialization. Due to the above, a study was conducted to hydrometallurgical laboratory scale aimed at finding the optimum conditions of the present process to remove phosphorus so that the content in the molybdenite concentrate is less than 0.04% . The study contemplated a sulfuric acid leaching environment, under different experimental conditions , which were able to remove about 51 % of the phosphorus present in the molybdenite concentrate , lowering the phosphorus content less than 0.0...