Preparation method of composite titanium dioxide

A rutile type titanium dioxide and titanium dioxide technology, applied in chemical instruments and methods, titanium dioxide, titanium oxide/hydroxide, etc., can solve the problem of high production cost of composite titanium dioxide, and achieve sufficient raw material sources, no environmental pollution, The effect of reducing resource consumption

Inactive Publication Date: 2015-03-04
TIANJIN XINDETAI IRON POWDER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Aiming at the problem of high production cost of composite titanium dioxide, the invention provides a method for preparing composite titanium dioxide, which is characterized in that the method is realized according to the following scheme:

Method used

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  • Preparation method of composite titanium dioxide

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Embodiment 1

[0020] Embodiment 1: a kind of preparation method of composite titanium dioxide, described method realizes by following scheme:

[0021] (1) Preparation of rutile titanium dioxide

[0022] Weigh 30g solid Ti(NO 3 ) 4 Dissolve in deionized water, prepare a solution with a mass concentration of 15%, and then add it to the three-necked bottle at one time; add 2mol / L ammonia solution dropwise to the three-necked bottle at room temperature, and keep stirring to adjust to an appropriate pH of At 7.5, stop dripping ammonia solution, and generate fresh Ti(OH) 4 White precipitate, after the reaction is complete, the resulting precipitate is centrifuged and washed with water until there is no nitrate ion in the system. Then Ti(OH) 4 The precipitate is dispersed in 0.5mol / HCl solution, in which the HCl and Ti must be ensured 4+ The molar ratio is between 3:1, set the temperature at 55°C, reflux peptization for 25min, the obtained precipitate is centrifuged, washed three times with a...

Embodiment 2

[0025] Embodiment 2: a kind of preparation method of composite titanium dioxide, described method realizes by following scheme:

[0026] (1) Preparation of rutile titanium dioxide

[0027] Weigh 30g solid Ti(NO 3 ) 4Dissolve in deionized water, prepare a solution with a mass concentration of 15%, and then add it to the three-necked bottle at one time; add 2mol / L ammonia solution dropwise to the three-necked bottle at room temperature, and keep stirring to adjust to an appropriate pH of At 8 o'clock, stop adding ammonia solution dropwise, and generate fresh Ti(OH) at this moment 4 White precipitate, after the reaction is complete, the resulting precipitate is centrifuged and washed with water until there is no nitrate ion in the system. Then Ti(OH) 4 The precipitate is dispersed in 0.5mol / HCl solution, in which the HCl and Ti must be ensured 4+ The molar ratio is between 3:1, set the temperature at 60°C, reflux peptization for 20min, the obtained precipitate is centrifuged...

Embodiment 3

[0030] Embodiment 3: a kind of preparation method of composite titanium dioxide, described method realizes by following scheme:

[0031] (1) Preparation of rutile titanium dioxide

[0032] Weigh 30g solid Ti(NO 3 ) 4 Dissolve in deionized water, prepare a solution with a mass concentration of 15%, and then add it to the three-necked bottle at one time; add 2mol / L ammonia solution dropwise to the three-necked bottle at room temperature, and keep stirring to adjust to an appropriate pH of At 8 o'clock, stop adding ammonia solution dropwise, and generate fresh Ti(OH) at this moment 4 White precipitate, after the reaction is complete, the resulting precipitate is centrifuged and washed with water until there is no nitrate ion in the system. Then Ti(OH) 4 The precipitate is dispersed in 0.5mol / HCl solution, in which the HCl and Ti must be ensured 4+ The molar ratio is between 3.5:1, set the temperature at 70°C, reflux and peptize for 10min, the obtained precipitate is centrifu...

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Abstract

The invention provides a preparation method of composite titanium dioxide. According to the preparation method, rutile type titanium dioxide is firstly directly synthesized in a liquid phase system at normal pressure and room temperature without phase conversion at high temperature, the process is simple, the production cost is greatly reduced, and the method is easy to realize industrial production. Secondly, prepared rutile type TiO2 is coated with white inorganic mineral powder with low price, the inorganic mineral powder is taken as a core in the liquid phase system, titanium dioxide slurry is taken as a coating matter, and inorganic mineral powder / TiO2 composite titanium dioxide is synthesized by a particle-particle coating method, so that the white mineral powder has certain natures of TiO2, such as high covering power and excellent weather resistance. By adding the composite titanium dioxide into plastic and rubber, the whiteness and gloss of the plastic can be significantly improved; and the composite titanium dioxide has the advantages of low production cost, sufficient raw material sources, no environmental pollution, a wide range of applications, significant economic benefits and the like, and further has positive effects in fields of reducing consumption of resources, protecting the environment and expanding the range of applications of the titanium dioxide.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a preparation method of titanium dioxide, in particular to a preparation method of composite titanium dioxide. Background technique [0002] Titanium dioxide (TiO 2 ) is a polycrystalline compound, which has three crystal forms: rutile, anatase and brookite, among which rutile TiO 2 The thermodynamic stability is the best, anatase and brookite TiO 2 The thermodynamic stability is poor, which is a metastable phase structure, and the metastable phase can be transformed into a stable rutile structure at a calcination temperature above 600 °C. [0003] Titanium dioxide is commonly known as titanium dioxide. As the best white additive at present, it has excellent physical and chemical properties such as whiteness, hiding power, and weather resistance. With the continuous progress of modernization and the continuous improvement of people's living standards, the market supply of titanium...

Claims

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Application Information

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IPC IPC(8): C09C1/36C09C3/06C01G23/053
Inventor 曹洪清任小弟张树芳
Owner TIANJIN XINDETAI IRON POWDER
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