A method, product and application for preparing red iron oxide by utilizing titanium dioxide by-product ferrous sulfate
A technology of ferrous sulfate and red iron oxide, applied in the directions of iron sulfate, iron oxide, iron oxide/iron hydroxide, etc., can solve the problem of limited use range of iron oxide red, achieve good consistency, easy filtration and washing, high purity effect
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Embodiment 1
[0058] The flow chart as shown in the figure, the method that utilizes titanium dioxide by-product ferrous sulfate to prepare iron oxide red in this implementation:
[0059] (1) Purification and impurity removal: the titanium dioxide by-product ferrous sulfate is dissolved in water under stirring, the reaction temperature is controlled at 50 ° C, and 5 mol / L ammonia water is added to make the pH value of the system 4.5; then 0.2 mol / L sulfuric acid is added. ammonium, stir for 15 minutes; filter and wash to obtain a preliminary purified ferrous sulfate solution; add a silicon remover to the preliminary purified ferrous sulfate solution, and polymerize ferric sulfate, cationic guar gum, and sodium alginate in water in the silicon remover The mass percentage content of 5000ppm, 500ppm and 120ppm respectively; control the temperature of the system at 50°C, add 5mol / L ammonia water and make the pH of the system 5.0, stir for 20 minutes, let stand for 6 hours, and filter to obtain F...
Embodiment 2
[0063] The titanium dioxide by-product ferrous sulfate used in this example is the same as in Example 1.
[0064] The method of utilizing titanium dioxide by-product ferrous sulfate to prepare iron oxide red in the present implementation: (1) purification and impurity removal: dissolving titanium dioxide by-product ferrous sulfate in water under stirring, controlling the reaction temperature to 30 ° C, adding 5mol / L of sodium hydroxide solution to make the pH value of the system 5.0; then add 0.2mol / L sodium sulfide, stir for 15 minutes; filter and wash to obtain a preliminary purified ferrous sulfate solution; add to the preliminary purified ferrous sulfate solution Silicone agent, the mass percentage content of polymerized ferric sulfate, cationic guar gum, and sodium alginate in water are respectively 2000ppm, 500ppm and 550ppm in the silicon remover; Make the pH of the system 5.0, stir for 20 minutes, let stand for 10 hours, and filter to obtain Fe after deep desiliconiza...
Embodiment 3
[0068] The titanium dioxide by-product ferrous sulfate used in this example is the same as in Example 1.
[0069]The method for preparing iron oxide red by utilizing titanium dioxide by-product ferrous sulfate in this implementation: (1) purification and impurity removal: dissolving titanium dioxide by-product ferrous sulfate in water under stirring, controlling the reaction temperature to 50 ° C, adding 2mol / L of sodium hydroxide solution to make the pH value of the system 4.0; then add 0.4mol / L sodium sulfide, stir for 20 minutes; filter and wash to obtain a preliminary purified ferrous sulfate solution; add to the preliminary purified ferrous sulfate solution Silicone agent, the mass percentage content of polymerized ferric sulfate, cationic guar gum, and sodium alginate in water are 8000ppm, 2000ppm and 1000ppm respectively in the silicon remover; Make the pH of the system 5.0, stir for 20 minutes, let stand for 12 hours, and filter to obtain Fe after deep desiliconizatio...
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