The impacts of the Rare Earth (RE) on the contents of available Phosphorus (P) and the physical character of the calcium superphosphate produced by the wet process on the basis of simulating the consumption of concent...The impacts of the Rare Earth (RE) on the contents of available Phosphorus (P) and the physical character of the calcium superphosphate produced by the wet process on the basis of simulating the consumption of concentrated sulphuric acid, the slurry concentration and the cure conditions in different wet process were studied in laboratory, and the results show that adding RE into different wet process does not raise available P, but changes its physical character,for example, the composite is loose and the color is offwhite.展开更多
A new procedure for the determination of cerium was established using the catalytic effect of Ce(IV) on the oxidation of tribromoarsenazo(TB-ASA) by potassium bromate.In 0.080 mol/L sulfuric acid medium,the maximum ab...A new procedure for the determination of cerium was established using the catalytic effect of Ce(IV) on the oxidation of tribromoarsenazo(TB-ASA) by potassium bromate.In 0.080 mol/L sulfuric acid medium,the maximum absorption peak of Ce(IV)-(TB-ASA)-KBrO3 system is at 510 nm.The amount of Ce(IV) and the difference of absorbance(△A) showed a good linear relationship over the range of 5.7×10-8-5.1×10-7 mol/L.The regression equation is △A=2.3×10-11 C(C:mol/L)+0.0196,with a regression coefficient of 0.9914 at t...展开更多
文摘The impacts of the Rare Earth (RE) on the contents of available Phosphorus (P) and the physical character of the calcium superphosphate produced by the wet process on the basis of simulating the consumption of concentrated sulphuric acid, the slurry concentration and the cure conditions in different wet process were studied in laboratory, and the results show that adding RE into different wet process does not raise available P, but changes its physical character,for example, the composite is loose and the color is offwhite.
文摘A new procedure for the determination of cerium was established using the catalytic effect of Ce(IV) on the oxidation of tribromoarsenazo(TB-ASA) by potassium bromate.In 0.080 mol/L sulfuric acid medium,the maximum absorption peak of Ce(IV)-(TB-ASA)-KBrO3 system is at 510 nm.The amount of Ce(IV) and the difference of absorbance(△A) showed a good linear relationship over the range of 5.7×10-8-5.1×10-7 mol/L.The regression equation is △A=2.3×10-11 C(C:mol/L)+0.0196,with a regression coefficient of 0.9914 at t...
