Catalytic oxidation technique for calcium sulfite
A technology for catalytic oxidation and calcium sulfite, applied in chemical instruments and methods, separation methods, separation of dispersed particles, etc., can solve problems such as unsuitable limestone-gypsum technology, achieve significant catalytic oxidation of calcium sulfite, reduce system The possibility of fouling, the effect of facilitating desulfurization operation
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[0016] Example 1
[0017] Add a FeSO4 solution with a concentration of 0.05 mol / L to the calcium sulfite slurry, keep the pH at about 5-6, and perform forced oxidation on the slurry. The curve of the oxidation rate with time is shown in Figure 1, which can be seen It is found that when the concentration of FeSO4 catalyst is 0.05 mol / L, the oxidation of calcium sulfite is 91.2%, while the oxidation process without the addition of catalyst, the oxidation rate is only 63.4%. In addition, it can be seen from Figure 2 that when the catalyst is added, the pH value can be maintained in a relatively stable state, and the oxidation rate is also in a higher range.
Example Embodiment
[0018] Example 2
[0019] Add a MnSO4 solution with a concentration of 0.05mol / L to the calcium sulfite slurry, keep the pH at about 5-6, and perform forced oxidation on the slurry to produce a graph of the oxidation rate versus time. It can also be seen that when MnSO4 is added After the catalyst, the oxidation rate of calcium sulfite is only 63.4%. In addition, it can be seen from the graph of the relationship between the pH value, the oxidation rate and the time of the catalytic oxidation process that when the catalyst is added, the pH value can be maintained in a relatively stable state, and the oxidation rate is also in a higher range.
Example Embodiment
[0020] Example 3
[0021] Add MnSO4 and FeSO4 solutions with a concentration of 0.05 mol / L to the calcium sulfite slurry. There is no special requirement for the ratio of the two, but the slurry maintains a pH value of about 5-6 after adding. It can also be seen that when the MnSO4 catalyst is added, the oxidation rate of calcium sulfite is obviously increased, the pH value can be kept in a relatively stable state, and the oxidation rate is also in a higher range.
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