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Composite envelope titanium white powder and preparation method thereof

A titanium dioxide and coating technology, which is applied in chemical instruments and methods, dyeing low-molecular-weight organic compounds treatment, inorganic pigment treatment, etc., can solve problems such as low blue-phase spectral characteristic value and inability to meet users' requirements for titanium dioxide quality. , to achieve the effect of excellent performance and broad application prospects

Inactive Publication Date: 2008-03-19
PANZHIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are many brands of domestic and foreign titanium dioxide products on the market, and the product quality is also different, but the blue phase spectrum characteristic value of each product is very low, which cannot meet the user's requirements for the quality of titanium dioxide

Method used

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  • Composite envelope titanium white powder and preparation method thereof
  • Composite envelope titanium white powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] The composite coating of cerium, silicon and aluminum under the concentrated acid condition of embodiment 1

[0039] Option 1:

[0040] 1. Prepare 0.9g of sodium hexametaphosphate (dissolved in 15ml of water).

[0041] 2. Prepare 5g Ce(NO 3 ) 3 ·6H 2 O (dissolved in 15ml of water).

[0042] 3. Take 200gTiO 2 , add 0.35L of water, add the dispersant prepared in step 1, and disperse for 10 minutes.

[0043] 4. Move it to a sand mill, sand it for 30 minutes, release it to the coating tank, and then dilute it with 0.65L water to a concentration of 200g / L.

[0044] 5. Use 5N NaOH to adjust the pH of the slurry in the coating tank to 8.8, and raise the temperature to 70°C.

[0045] 6. After 10 minutes, use a constant flow pump to add the solution prepared in step 2 (that is, TiO 2 1% CeO by weight 2 (2g)).

[0046] 7. After adding cerium nitrate, the pH of the slurry was measured to be 1.0. After the slurry was aged for 10 minutes, 5N NaOH was added at the 14th minu...

Embodiment 2

[0079] Example 2 Ce, Si, Al composite coating under dilute acid condition

[0080] Scheme No. 1 (using the crude product of Yu titanium dioxide)

[0081] 1. Prepare 0.9g of sodium hexametaphosphate (dissolved in 15ml of water).

[0082] 2. Prepare 5g Ce(NO 3 ) 3 ·6H 2 O (dissolved in 30ml of water).

[0083] 3. Take 200g of Yu titanium dioxide crude product, put it into a high-speed disperser, pour 0.45L hot water, disperse at high speed for 10 minutes, add 0.9g sodium hexametaphosphate solution, and disperse at high speed for 10 minutes.

[0084] 4. Move the slurry to a sand mill, grind it for 40 minutes, and release it to the coating tank. Pay attention to filter with a 325-mesh sieve to remove coarse particles, and then dilute the slurry with 0.55L water to a concentration of 200g / L.

[0085] 5. Raise the temperature of the slurry to 70°C, and then adjust the pH to 8.8 with 5N NaOH solution.

[0086] 6. Stir the slurry for 10 minutes, then add 30ml of the cerium nitra...

Embodiment 3

[0111] Example 3 Ce, Si, Al, Zr composite coating

[0112] 1, do according to the 1~11 steps of No. 1 scheme of embodiment 2

[0113] 2. Then add 25% H2SO4 to lower the pH value of the slurry to 5.0, and lower the temperature to 50°C.

[0114] 3. Prepare 5.8g zirconium sulfate Zr(SO 4 ) 2 4H 2 O, dissolved in 40ml hot water (equivalent to 200gTiO 2 Base 1% ZrO 2 ).

[0115] 4. Add the prepared zirconium sulfate solution into the slurry at 15 minutes and stir.

[0116] 5. Measure the pH value, adjust the pH to 8.0 with 5N NaOH, and age the slurry for 15 minutes under stirring.

[0117] 6. Then use 25% H 2 SO 4 Fine-tune the pH to 7.5, and keep the temperature at 50°C.

[0118] 7. Add 7.2g NaAlO 2 Dissolve with 100ml of water. Add NaAlO after 20min 2 , measure the pH value of the slurry at any time, when the pH reaches 10, add 25% H 2 SO 4 To keep pH=10~10.5.

[0119] 8. The remaining steps are the same as steps 15-19 in Example 2.

[0120] Sample number: 3-1

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Abstract

The invention relates to a composite coated titanium dioxide and a method for preparing the same, which belongs to chemical industry, wherein the surface of the composite coated titanium dioxide concludes at least one ingredient of silicon, aluminum and zirconium and cerium. The preparation method of the composite coated titanium dioxide of the invention includes 6 steps as follows: beating and dispersion, fine grinding and screening, inorganic coating, washing and filtering, dry and grinding, which is simple without any special equipment needed. The composite coated titanium dioxide of the invention has good comprehensive pigment performance, blue phase spectrum characteristic parameter, dispersion and brightness which are superior to international advanced levels, so the invention has wide application prospect.

Description

technical field [0001] The invention relates to a compound-coated titanium dioxide and a preparation method of the composite-coated titanium dioxide, belonging to the field of chemical industry. Background technique [0002] Since the titanium dioxide pigment was invented and its defects were recognized, people have been exploring its post-treatment methods. In recent decades, most of the literature on titanium dioxide is about surface treatment. Foreign patents on different coating methods of titanium dioxide, the types of inorganic coating agents are basically the same, so in terms of inorganic treatment, the main direction of current research is to use traditional treatment agents such as aluminum, silicon, and titanium to coat Improvement of film titanium dioxide process rather than exploring new treatment agents. Among them, aluminum and silicon are the two most important surface treatment agents. At present, the titanium dioxide produced abroad is almost treated with ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/36C09C3/06C09C3/08
Inventor 邹建新杨成梅涛杨绍利黄载春
Owner PANZHIHUA UNIV
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