Production method of titanium dioxide particles
A titanium dioxide and production method technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, coating, etc., can solve the problems of slow promotion, high price, single color of pigment, etc., and achieve excellent near-infrared reflection ability, excellent weather resistance, The effect of excellent scattering ability
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Embodiment 1
[0015] The index of the prepared titanium solution is: TiO 2 =160.5g / L; F-H 2 SO 4 =103.5g / L; Fe / TiO 2 =0.26, the seed crystal titanium solution is taken according to the proportion volume of 2.0% of the total volume of the hydrolyzed titanium solution, preheated to 80°C, and NaOH is used according to 15.1% of the total titanium content of the seed crystal titanium solution and preheated to 82°C, at 2 Add the preheated titanium solution into the preheated NaOH solution within 1 minute, then raise the temperature to 92°C, stop heating; take 10ml seed crystals to measure the stability, control the stability to 160ml, and the seed crystal preparation is completed; hydrolyze the titanium solution Raise the temperature to 90°C, add the prepared seed crystals, stir for 1 minute, raise the temperature to 102°C at a rate of 0.4-0.6°C / min, keep the temperature until the titanium liquid becomes slightly turbid and stop heating, and press 0.9°C when the temperature drops to 98°C ~1.1°...
Embodiment 2
[0017] The operation process is the same as in Example 1, except that the qualified metatitanic acid is prepared into a slurry with a concentration of 420g / L for salt treatment, and calcined seeds are added in a proportion of 1.5% for salt treatment, and hydrogen is added in a proportion of 0.2%. Potassium oxide, phosphoric acid is added at a rate of 0.15%, and aluminum sulfate is added at a rate of 0.4%. After stirring evenly, filter and dry and calcined, the maximum temperature of calcining is controlled at 1000±10°C.
Embodiment 3
[0019] Operation process is with embodiment 1. The difference is that 2.5% calcined seeds are added in the bleaching process, and the salt treatment is no longer added.
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