Method for producing anti-yellowing anatase type universal titanium dioxide
An anatase type, titanium dioxide technology, applied in chemical instruments and methods, inorganic pigment treatment, dyeing organosilicon compound treatment, etc. The effect of strong dispersion stability, good lattice stability and good dispersion stability
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Embodiment 1
[0045] Embodiment one is prepared by the method of the present invention
[0046] The primary product obtained by the rotary kiln is made into a slurry of 850g / l with desalinated water, and sodium silicate is used as a wetting agent. Adjust the pH value to 10.00 with NaOH, disperse and sand-mill (the residue on a 325-mesh sieve is less than 0.01%); dilute the titanium dioxide slurry obtained after sand-milling to a concentration of 310g / l, and adjust the pH value with 200g / l NaOH 10.00, heat up to 60°C, add 0.6% titanium dioxide mass sodium silicate solution (as SiO 2 Calculated), aging for 60min after the end; add aluminum sulfate 0.7% (as Al 2 o 3 Calculated), aging for 25 minutes after the end; at 50 minutes, add sodium metaaluminate 0.85% (Al 2 0 3 After the completion of aging for 45 minutes, aluminum sulfate was added to adjust the pH of the slurry to 8.0, and aging for 1 hour.
[0047] Filter the obtained titanium dioxide slurry, wash for 2 hours, flash dry to make...
Embodiment 2
[0074] Embodiment two is prepared by the method of the present invention
[0075] The primary product obtained by the rotary kiln is made into 850g / l slurry with desalinated water, isopropanolamine is used as a wetting agent, and the pH value is adjusted to 10.00 with 200g / l NaOH, and then dispersed and sand-milled (325 mesh sieve) The residue is less than 0.01%); dilute the titanium dioxide slurry obtained after sand grinding to a concentration of 310g / l, adjust the pH value to 10.00 with 200g / l NaOH, raise the temperature to 60°C, and add silicon dioxide with a mass of 0.8% of titanium dioxide in 10 minutes Sodium acid solution (as SiO 2 Calculated), aging for 60min after the end; add aluminum sulfate 0.7% (as Al 2 o 3 Calculated), aging for 25 minutes after the end; at 50 minutes, add sodium metaaluminate 0.85% (Al 2 0 3 After the completion of aging for 45 minutes, aluminum sulfate was added to adjust the pH of the slurry to 8.0, and aging for 1 hour.
[0076] Filter ...
Embodiment 3
[0081] Embodiment three is prepared by the method of the present invention
[0082] The primary product obtained by the rotary kiln is made into a slurry of 850g / l with desalinated water, and sodium hexametaphosphate is used as a wetting agent, and the addition amount of sodium hexametaphosphate is based on P 2 o 5 Calculated as 0.2% of the titanium dioxide mass in the titanium dioxide slurry, adjust the pH value to 10.00 with 200g / l NaOH, disperse and sand mill (325 mesh sieve residue is less than 0.01%); dilute the titanium dioxide slurry obtained after sand grinding to The concentration is 310g / l, use 200g / l NaOH to adjust the pH value to 10.00, raise the temperature to 60°C, add a sodium silicate solution with 0.8% titanium dioxide mass (as SiO 2 Calculated), aging for 60 minutes after the end; add 0.85% aluminum sulfate (as Al 2 o 3 Add 1.15% sodium metaaluminate (calculated as Al2O3) within 50 minutes, and mature for 45 minutes after the completion of the curing. Afte...
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