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Preparation method of titanium dioxide primary product with improved light resistance

A technology of titanium dioxide and light resistance, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problem of low light resistance of the first titanium dioxide product, improve the electronic work function, improve the service life, and uniform particle size distribution Effect

Pending Publication Date: 2020-11-24
攀钢集团重庆钒钛科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is the low light fastness of existing titanium dioxide primary products

Method used

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  • Preparation method of titanium dioxide primary product with improved light resistance

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preparation example Construction

[0019] The preparation method of the high light fastness titanium dioxide of the present invention can specifically be carried out as follows:

[0020] (1) Add second-washed metatitanic acid into deionized water or distilled water, perform beating and dispersion treatment, and obtain metatitanic acid slurry with a slurry concentration of 300-600g / L;

[0021] (2) Add calcined seed crystals, vanadium compounds, carbon powder, potassium compounds, phosphorus compounds, and aluminum compounds to the slurry obtained in step (1), and stir for 30 to 90 minutes to obtain slurry; the amount of vanadium added is 0.01 to 0.3 wt%, the amount of carbon powder added is 0.05-0.6wt%;

[0022] (3) Put the slurry obtained in step (2) into an oven, and dry it at 60-120°C;

[0023] (4) Put the material obtained in step (3) into a program-controlled muffle furnace, and the heating rate is 50-150° C. / min;

[0024] (5) When the temperature rises to 150-250°C, keep it warm for 60-180 minutes to deh...

Embodiment 1

[0036] (1) Add second-washed metatitanic acid to deionized water or distilled water, and perform beating and dispersion treatment to obtain metatitanic acid slurry with a slurry concentration of 300g / L;

[0037] (2) Add the calcined seed crystal, potassium compound, phosphorus compound, and aluminum compound to the metatitanic acid slurry, and stir for 45 minutes each time a substance is added to obtain the slurry;

[0038] (3) adding 0.05% wt of vanadium compound and 0.10% wt of carbon powder to the slurry obtained in step (2);

[0039] (4) Dry the material obtained in step (3), and then put it into a program-controlled muffle furnace. When the temperature rises to 200°C, keep it warm for 120 minutes to dehydrate the material, and then continue to heat up at a rate of 50°C / min. When the temperature rises to 600°C / min, keep it warm for 60 minutes to desulfurize the material, then continue to heat up, and at the same time introduce oxygen at a heating rate of 120°C / min, when th...

Embodiment 2

[0043] (1) Add second-washed metatitanic acid to deionized water or distilled water, and perform beating and dispersion treatment to obtain metatitanic acid slurry with a slurry concentration of 300g / L;

[0044] (2) Add the calcined seed crystal, potassium compound, phosphorus compound, and aluminum compound to the metatitanic acid slurry, and stir for 45 minutes each time a substance is added to obtain the slurry;

[0045] (3) adding 0.15%wt of vanadium compound and 0.25%wt of carbon powder to the slurry obtained in step (2);

[0046] (4) Dry the material obtained in step (3), put it into a program-controlled muffle furnace, and heat up at a rate of 60°C / min. When the temperature rises to 200°C, keep it warm for 120min to dehydrate the material, and then continue to heat up. The rate is 100°C / min. When the temperature rises to 600°C / min, keep it warm for 60 minutes to desulfurize the material, then continue to heat up, and at the same time feed oxygen. The heating rate is 120...

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Abstract

The invention discloses a preparation method of a titanium dioxide primary product with improved light resistance, and belongs to the technical field of chemical engineering. The preparation method comprises the steps of: with secondarily-washed metatitanic acid as a raw material, sequentially carrying out salt treatment and calcining treatment, carrying out cooling, and carrying out grinding, soas to obtain the titanium dioxide primary product, wherein the raw material is doped with vanadium and carbon in the salt treatment process, the doped vanadium is at least one of vanadium oxide, vanadium trioxide, vanadium dioxide and vanadium pentoxide, and the doped carbon is carbon powder. By doping the raw material with the vanadium and the carbon, a low-valence vanadium compound is acquired,the electronic escaping capability of titanium dioxide under a light condition is inhibited, and the light resistance of the primary product is improved; and meanwhile, by reasonably controlling a calcining process, lattice defects are reduced, and the vanadium and the carbon bring out the best in each other, so that the light resistance is improved, the particle size distribution of the titaniumdioxide primary product is uniform, and pigment indexes are excellent.

Description

technical field [0001] The invention belongs to the technical field of chemical industry, relates to the preparation of titanium dioxide, and relates to a method for preparing a primary product of titanium dioxide providing light resistance. Background technique [0002] Titanium dioxide, commonly known as titanium dioxide, is currently the best white pigment in the world. It not only has very stable physical and chemical properties, but also has excellent optical and electrical properties such as high refractive index, best hiding power, best whiteness and brightness, and is widely used. In coatings, plastics, paper, ink, electronics and other fields. [0003] Light fastness refers to the ability of products containing titanium dioxide pigments to resist sunlight to avoid discoloration, chalking and loss of light when exposed to outdoor weather conditions. The photochemical activity of titanium dioxide pigment is the main factor affecting the light resistance. Because tita...

Claims

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Application Information

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IPC IPC(8): C01G23/08
CPCC01G23/08C01P2006/60
Inventor 曹磊淦文军罗静袁立军喻晖和柳柳令
Owner 攀钢集团重庆钒钛科技有限公司
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