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Producing method of yellowing-resistant general anatase titanium dioxide

An anatase type titanium dioxide and anatase type technology are applied in chemical instruments and methods, inorganic pigment processing, dyeing organosilicon compound processing and other directions, which can solve the problems of not involving the improvement of product anti-yellowing, not involving anti-yellowing and other problems. , to achieve the effect of strong water dispersion stability, good lattice stability and good dispersion stability

Active Publication Date: 2014-05-28
PANZHIHUA TAIHAI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The Chinese invention patent with the patent number of 200610043664.1 discloses "processing technology of titanium dioxide with high application performance". The Chinese invention patent of 200610020847.1 discloses the "production method of high weather resistance titanium dioxide pigment", which discloses a production method of high weather resistance products, and the product does not involve improving the yellowing resistance of the product

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  • Producing method of yellowing-resistant general anatase titanium dioxide
  • Producing method of yellowing-resistant general anatase titanium dioxide
  • Producing method of yellowing-resistant general anatase titanium dioxide

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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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Abstract

The invention discloses a producing method of yellowing-resistant general anatase titanium dioxide. The method comprises the following steps: A, beating calcined anatase titanium dioxide with desalted water to prepare slurry, adding wetting agent sodium silicate, and then adjusting the slurry pH to 9-11; B, sanding to obtain anatase titanium dioxide initial product slurry with 325 mesh residues on a sieve being less than 0.01%; C, diluting with the desalted water to a concentration of 280-340g / L by TiO2, adjusting the pH to 9-11; D, heating up to 40-90 DEG C, then adding silicon salt within 10-60min, curing for 60-120min; adding aluminium salt, curing for 15-60min; adding the aluminum salt again, curing for 60-120min; and E, filtering, washing, drying, adding an organic surface treatment agent for gas pulverization to obtain the general titanium dioxide. The general titanium dioxide produced by the method has the characteristics of good lattice stability, strong water dispersion stability and the like, and especially has the characteristics of heat-resisting and yellowing yellowing-resistant characteristics.

Description

technical field [0001] The invention belongs to the field of titanium dioxide production, and in particular relates to a method for producing general-purpose anatase-type titanium dioxide with high weather resistance and better yellowing resistance. Background technique [0002] Titanium dioxide is mainly composed of crystalline titanium dioxide, which has a much higher refractive index than other inorganic substances, which makes titanium dioxide the best white pigment with the strongest hiding power, and is widely used as an important chemical raw material. It is used in many fields such as coatings, plastics, paper, inks and ceramics. As a rising star of white pigments, titanium dioxide has obvious advantages and has replaced traditional white pigments to become the leading product in the pigment market. Its good pigment performance has made titanium dioxide the preferred white pigment in many fields such as industry, civil use, and construction. [0003] At present, in...

Claims

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Application Information

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IPC IPC(8): C09C1/36C09C3/04C09C3/06C09C3/08C09C3/12
Inventor 黄成魏军周华叶贵林谢明生王甜灞杨晓强
Owner PANZHIHUA TAIHAI TECH
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