Method for synthesizing iron phosphate by using titanium dioxide by-product ferrous sulfate
A technology of ferrous sulfate and ferrous sulfate solution, which is applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve the problem of large amount of wastewater generation, and achieve the effect of reducing the amount of wastewater generated and the number of washings
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Embodiment 1
[0020] This embodiment provides a method for utilizing titanium dioxide by-product ferrous sulfate to synthesize ferric phosphate, such as figure 1 As shown, the specific steps include:
[0021] (1) Prepare a 300 g / L ferrous sulfate solution with titanium dioxide by-product ferrous sulfate, add iron powder to reduce ferric iron, and stir for 0.5 h. Then heat the solution to 30°C, add ferrous hydroxide to adjust the pH to 3.0, and perform hydrolysis to remove titanium. After the reaction, the solid-liquid separation is obtained to obtain the titanium-removed liquid;
[0022] (2) Add phosphoric acid and hydrogen peroxide to the titanium-removing solution obtained in step (1) to oxidize and synthesize ferric phosphate, and use ferrous hydroxide to control the reaction pH to 1.4. After the reaction, the slurry undergoes solid-liquid separation, washing, drying and dehydration to obtain the iron phosphate product;
[0023] Further, the ferrous hydroxide used is prepared by react...
Embodiment 2
[0025] This embodiment provides a method for utilizing titanium dioxide by-product ferrous sulfate to synthesize ferric phosphate, such as figure 1 As shown, the specific steps include:
[0026] (1) Prepare a 500 g / L ferrous sulfate solution with titanium dioxide by-product ferrous sulfate, add iron powder to reduce ferric iron, and stir for 1 hour. Then heat the solution to 60°C, add ferrous hydroxide to adjust the pH to 4.5, and perform hydrolysis to remove titanium. After the reaction, the solid-liquid separation is obtained to obtain the titanium-removed liquid;
[0027] (2) Add phosphoric acid and hydrogen peroxide to the titanium-removing solution obtained in step (1) to oxidize and synthesize ferric phosphate, and use ferrous hydroxide to control the reaction pH to 1.6. After the reaction, the slurry undergoes solid-liquid separation, washing, drying and dehydration to obtain the iron phosphate product;
[0028] It should be noted that the ferrous hydroxide used is p...
Embodiment 3
[0030] This embodiment provides a method for utilizing titanium dioxide by-product ferrous sulfate to synthesize ferric phosphate, such as figure 1 As shown, the specific steps include:
[0031] (1) Prepare a 700 g / L ferrous sulfate solution with titanium dioxide by-product ferrous sulfate, add iron powder to reduce ferric iron, and stir for 2 hours. Then heat the solution to 70°C, add ferrous hydroxide to adjust the pH to 5.5, and perform hydrolysis to remove titanium. After the reaction, the solid-liquid separation is obtained to obtain the titanium-removed liquid;
[0032] (2) Add phosphoric acid and hydrogen peroxide to the obtained titanium removal solution in step (1) to oxidize and synthesize ferric phosphate, and use ferrous hydroxide to control the reaction pH to 2.0. After the reaction, the slurry undergoes solid-liquid separation, washing, drying and dehydration to obtain the iron phosphate product;
[0033] It should be noted that the ferrous hydroxide used is o...
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