Method for producing hydrated titanium dioxide with low energy consumption
A hydrated titanium dioxide, low energy consumption technology, applied in the direction of titanium dioxide, chemical instruments and methods, titanium oxide/hydroxide, etc., to achieve the effects of saving concentrated steam, uniform particle size distribution, and reducing production costs
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Embodiment 1
[0026] First, preheat the sodium hydroxide solution with a concentration of 10% and the titanium solution with a concentration of 160g / L to 80°C respectively, then add the seed titanium solution into the alkali solution within 4 minutes, and rapidly raise the temperature to 94-98°C Inside, keep warm until the system stability reaches 120mL water / 10mL seed crystal titanium solution, quickly put the prepared seed crystal into the hydrolyzed titanium solution at about 96°C required for hydrolysis, and stir for 5 minutes. The seed crystal addition amount is TiO in the hydrolyzed titanium solution 2 Content of 1.0%, sodium hydroxide and TiO in seed titanium solution 2 The ratio is 10%.
[0027] After stirring and premixing, heat up to primary boiling 103°C, keep boiling to observe the graying of the hydrolysis system, the hydrolysis rate is 32.5%, stop stirring and heating for 30 minutes, heat up again to secondary boiling 104°C, and keep warm until the hydrolysis is completed.
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Embodiment 2
[0031] First, preheat the sodium hydroxide solution with a concentration of 10% and the titanium solution with a concentration of 185g / L to 80°C respectively, then add the seed titanium solution into the alkaline solution within 4 minutes, and rapidly raise the temperature to 94-98°C Inside, keep warm until the system stability reaches 120mL water / 10mL seed crystal titanium solution, quickly put the prepared seed crystal into the hydrolysis titanium solution at about 96°C required for hydrolysis, and stir for 10 minutes. The seed crystal addition amount is TiO in the hydrolyzed titanium solution 2 Content of 1.8%, sodium hydroxide and TiO in the seed titanium solution 2 The ratio is 16%.
[0032] After stirring and premixing, heat up to primary boiling 104°C, keep boiling to observe the graying of the hydrolysis system, the hydrolysis rate is 38.3%, stop stirring and heating for 30 minutes, heat up again to secondary boiling 105°C, and keep warm until the hydrolysis is comple...
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