Preparation method of high-weatherability nanometer rutile titanium dioxide

A nano-rutile, titanium dioxide technology, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of difficult industrial production, affecting product purity, and difficult control of conditions, achieving easy industrial production and improving alkali-soluble effect. , the effect of low synthesis temperature

Active Publication Date: 2018-09-11
NANJING TITANIUM DIOXIDE CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The hydrothermal method does not require high-temperature roasting, but the method is complicated to operate, requires high equipment, and is not easy for industrial production
The microemulsion method is a method of using two incompatible solvents to synthesize a solid phase under the action of a surfactant. The surfactant introduced by this method is not easy to recycle, pollutes the environment, and affects the purity of the product.
The sol-gel metho

Method used

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  • Preparation method of high-weatherability nanometer rutile titanium dioxide
  • Preparation method of high-weatherability nanometer rutile titanium dioxide
  • Preparation method of high-weatherability nanometer rutile titanium dioxide

Examples

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Effect test

Embodiment 1

[0050] A preparation method of high weather resistance nano rutile titanium dioxide, the preparation process is as follows:

[0051] (1) Pump the metatitanic acid slurry with a concentration of 250g / L and the sodium hydroxide solution with a concentration of 600g / L into the metering tank respectively and preheat them. The mass ratio of sodium hydroxide to metatitanic acid is 1.8:1;

[0052] (2) After the sodium hydroxide solution is preheated to 90°C and the metatitanic acid slurry is preheated to 60°C, put the sodium hydroxide solution into the alkali-soluble tank first, and then put the preheated solution within 30 minutes The metatitanic acid slurry was put into an alkali solution tank, and the mixed solution was stirred at 105°C for 2 hours;

[0053] (3) Cool the mixture to room temperature, pump it into a plate and frame filter press for water washing, wash until the content of sodium hydroxide in the mixture is 4g / L, and unload to obtain the alkali-soluble material;

[...

Embodiment 2

[0071] A preparation method of high weather resistance nano rutile titanium dioxide, the preparation process is as follows:

[0072] (1) Pump the metatitanic acid slurry with a concentration of 280g / L and the sodium hydroxide solution with a concentration of 650g / L into the metering tank respectively and preheat them. The mass ratio of sodium hydroxide to metatitanic acid is 1.9:1;

[0073] (2) After the sodium hydroxide solution is preheated to 100°C and the metatitanic acid slurry is preheated to 70°C, put the sodium hydroxide solution into the alkali-soluble tank first, and then put the preheated solution within 30 minutes Put the metatitanic acid slurry into an alkali solution tank, and stir the mixed solution at 110°C for 2 hours;

[0074] (3) Cool the mixture to room temperature, pump it into a plate-and-frame filter press for water washing, wash until the content of sodium hydroxide in the mixture is 3g / L, and unload to obtain the alkali-soluble material;

[0075] (4) ...

Embodiment 3

[0092] A preparation method of high weather resistance nano rutile titanium dioxide, the preparation process is as follows:

[0093] (1) Pump the metatitanic acid slurry with a concentration of 285g / L and the sodium hydroxide solution with a concentration of 680g / L into the metering tank respectively and preheat them. The mass ratio of sodium hydroxide to metatitanic acid is 1.9:1;

[0094] (2) After the sodium hydroxide solution is preheated to 105°C and the metatitanic acid slurry is preheated to 78°C, put the sodium hydroxide solution into the alkali-soluble tank first, and then put the preheated solution within 30 minutes The metatitanic acid slurry was put into an alkali solution tank, and the mixed solution was stirred at 112°C for 3 hours;

[0095] (3) Cool the mixture to room temperature, pump it into a plate and frame filter press for water washing, wash until the content of sodium hydroxide in the mixture reaches 3.5g / L, and unload to obtain the alkali-soluble materi...

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Abstract

The invention relates to a preparation method of high-weatherability nanometer rutile titanium dioxide. The method has the following specific steps: respectively pumping metatitanic acid slurry and asodium hydroxide solution into a metering tank and preheating, mixing and stirring, heating and conducting an alkali dissolution reaction, cooling a mixture to room temperature, washing and discharging to obtain an alkali dissolution material; adding deionized water to the generated alkali dissolution material and stirring, adding concentrated hydrochloric acid and regulating pH of the slurry, heating the slurry, pressurizing the mixture and conducting a sol reaction, adding water to the mixture for dilution and stirring to obtain a nanometer rutile titanium dioxide crude product, pumping thecrude product into a centrifuge and centrifuging the slurry; neutralizing by adding a neutralizing agent and successively washing, coating, washing, drying and crushing so as to obtain the high-weatherability nanometer rutile titanium dioxide product. The method has the following advantages: synthesis temperature is low; the method is easy for industrial production; conditions are easy to control;and cost is low.

Description

technical field [0001] The invention provides a preparation method of high-weather-resistant nano-rutile titanium dioxide, which belongs to the field of nanometer materials. Background technique [0002] Titanium dioxide, chemical name: titanium dioxide (TiO2), is a polymorphic compound that is non-toxic and harmless to the human body. It has three crystal forms, brookite, anatase and rutile, of which the structure of rutile TiO2 is the most Stable and widely used, especially nano-rutile TiO2 has strong hiding power, coloring power and ultraviolet absorption ability due to its small particle size and large specific surface area. It has a wide range of applications and has high commercial value. [0003] At present, the preparation methods of nano-scale titanium dioxide mainly include gas-phase method and liquid-phase method. Titanium dioxide nanoparticles prepared by the gas phase method have high purity and good dispersibility, but the required equipment is complex, energ...

Claims

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Application Information

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IPC IPC(8): C01G23/053B82Y30/00C09C1/36C09C3/06C09C3/08
CPCB82Y30/00C01G23/053C01G23/08C01P2004/04C09C1/3692C09C3/006
Inventor 高岭顾勇王唯诚魏刚杜茂平王园
Owner NANJING TITANIUM DIOXIDE CHEM
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