High-purity ultra-fine titanium dioxide prepared from industrial metatitanic acid and preparation method of titanium dioxide
A technology of ultra-fine titanium dioxide and metatitanic acid, which is applied in the direction of titanium dioxide, titanium oxide/hydroxide, nanotechnology, etc., can solve the problems of long process flow, high quality requirements of raw materials, complex process, etc., and achieve the effect of broad application prospects
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Embodiment 1
[0035] Using the metatitanic acid prepared by hydrolysis in the traditional sulfuric acid titanium dioxide production process as raw material, after washing and bleaching, add deionized water to dilute the beating, and adjust the concentration of metatitanic acid slurry to 210g / L (using TiO 2 mass), and disperse the slurry with a 500W ultrasonic pulverizer for 10 minutes, then add 2.5‰ of polyethylene glycol as a dispersant to fully disperse the metatitanic acid slurry. Transfer the dispersed metatitanic acid slurry into a reactor with stirring heating and condensing reflux, gradually raise the temperature to boiling, keep a slight boiling state for 3 hours, stop the reaction and gradually cool to 60-70°C, use deionized Wash with water, and use ammonium thiocyanate to detect the presence of iron ions, and wash until no iron ions are detected, and the filter cake is purified metatitanic acid. Afterwards, the purified metatitanic acid filter cake was dispersed with deionized wat...
Embodiment 2
[0037] Using the metatitanic acid prepared by hydrolysis in the traditional sulfuric acid titanium dioxide production process as raw material, after washing and bleaching, add deionized water to dilute the beating, and adjust the concentration of metatitanic acid slurry to 340g / L (using TiO 2mass), and disperse the slurry with a 500W ultrasonic pulverizer for 10 minutes, then add dispersant polyethylene glycol 3.3‰ to fully disperse the metatitanic acid slurry. Transfer the dispersed metatitanic acid slurry into a reactor with stirring heating and condensing reflux, gradually raise the temperature to boiling, keep a slight boiling state for 3.5 hours, stop the reaction and gradually cool to 70°C, wash with deionized water while it is hot , and use ammonium thiocyanate to detect the presence or absence of iron ions, wash until no iron ions can be detected, and the filter cake is purified metatitanic acid. Afterwards, the purified metatitanic acid filter cake was dispersed with ...
Embodiment 3
[0039] The metatitanic acid prepared by hydrolysis in the traditional sulfuric acid titanium dioxide production process is used as raw material. After washing and bleaching, deionized water is added to dilute the beating, and the concentration of metatitanic acid slurry is adjusted to 260g / L (using TiO 2 mass), and disperse the slurry with a 500W ultrasonic pulverizer for 10 minutes, then add dispersant polyethylene glycol 3.8‰ to fully disperse the metatitanic acid slurry. Transfer the dispersed metatitanic acid slurry into a reactor with stirring heating and condensing reflux, gradually raise the temperature to boiling, keep a slight boiling state for 4 hours, stop the reaction and gradually cool to 67°C, wash with deionized water while it is hot , and use ammonium thiocyanate to detect the presence or absence of iron ions, wash until no iron ions can be detected, and the filter cake is purified metatitanic acid. Afterwards, the purified metatitanic acid filter cake was disp...
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