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A kind of production method of titanium dioxide with stable large specific surface area

A large specific surface area, titanium dioxide technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of large specific surface area, small size, unable to meet production needs, unstable use, poor resistance to crushing, etc., to achieve enhanced binding force, Effect of maintaining stability and improving dispersibility

Active Publication Date: 2016-06-08
安徽迪诺环保新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is that the product obtained by the existing titanium dioxide production method has a small specific surface area and cannot meet the production requirements, or has a large specific surface area but poor resistance to crushing and is unstable in use. Therefore, a Production method of titanium dioxide with stable large specific surface area

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Example 1: (1) Preparation of titanium dioxide precursor: Take 20ml of industrial-grade titanium sulfate, slowly add sodium hydroxide solution dropwise under stirring conditions at 75°C to prepare a titanium hydroxide suspension, and then add 5ml of Sodium dodecylbenzene sulfonate was used as a surfactant, and the titanium dioxide precursor was obtained by stirring for 1 h; (2), the preparation of anti-shattering agent: Al 2 o 3 , MnO 2 , wood fiber, diatomaceous earth and talcum powder are mixed uniformly by weight 5:310:15:20, add ethanol and stir under the environment of 5MPa, 100 °, cool at room temperature to obtain powdery mixture, this powdery mixture is used Ultrasonic crushing into an anti-fragmentation agent with an average particle size of 1um; (3) Preparation of titanium dioxide: adding sulfuric acid to the titanium dioxide precursor to adjust the pH of the system to 5, and transferring the titanium dioxide precursor and anti-fragmentation agent to a hydrot...

Embodiment 2

[0012] Example 2: (1) Preparation of titanium dioxide precursor: Take 30ml of industrial-grade titanium sulfate, slowly add sodium hydroxide solution dropwise under stirring conditions at 85°C to prepare a titanium hydroxide suspension, and then add 3ml of Sodium dodecylbenzene sulfonate was used as a surfactant, and stirred for 3 hours to obtain a titanium dioxide precursor; (2), preparation of an anti-shattering agent: Al 2 o 3 , MnO 2 , wood fiber, diatomaceous earth and talcum powder are mixed uniformly by weight 7:614:20:30, add ethanol and stir under the environment of 10MPa, 130 °, cool at room temperature to obtain powdery mixture, this powdery mixture is used Ultrasonic crushing into an anti-fragmentation agent with an average particle size of 3um; (3) Preparation of titanium dioxide: adding sulfuric acid to the titanium dioxide precursor to adjust the pH of the system to 5, and transferring the titanium dioxide precursor and anti-fragmentation agent to a hydrotherma...

Embodiment 3

[0013] Example 3: (1) Preparation of titanium dioxide precursor: take: 40ml of industrial-grade titanium sulfate, slowly add sodium hydroxide solution dropwise under stirring conditions at 80°C to prepare titanium hydroxide suspension, and then add 2ml to it Sodium dodecylbenzene sulfonate was used as a surfactant, and stirred for 2 hours to obtain a titanium dioxide precursor; (2), preparation of anti-shattering agent: Al 2 o 3 , MnO 2 , wood fiber, diatomite and talcum powder are mixed uniformly by weight 6:412:18:25, add ethanol and stir under the environment of 7MPa and 120 °, cool at room temperature to obtain a powdery mixture, and use the powdery mixture Ultrasonic crushing into an anti-fragmentation agent with an average particle size of 2um; (3) Preparation of titanium dioxide: add sulfuric acid to the titanium dioxide precursor to adjust the pH of the system to 5, and transfer the titanium dioxide precursor and anti-fragmentation agent to a hydrothermal reaction ket...

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Abstract

The invention discloses a method for preparing stable titanium dioxide with large specific surface area, which comprises the following steps: (1), preparation of titanium dioxide precursor; (2), preparation of anti-shattering agent; (3), preparation of titanium dioxide: Add sulfuric acid dropwise to the titanium dioxide precursor to adjust the pH of the system to 5, transfer the titanium dioxide precursor and the anti-shattering agent to a hydrothermal reaction kettle, and filter the product after cooling to room temperature; the beneficial effect of the present invention is that it is prepared by a hydrothermal method Titanium dioxide avoids the phenomenon of particle agglomeration in the process of converting hydroxide into oxide in the traditional method, and increases the specific surface area of ​​titanium dioxide; adding an anti-breaking agent during the production process can enhance the bonding force between titanium dioxide molecules without affecting The physical and chemical properties of titanium dioxide also play a role in maintaining the stability of titanium dioxide, so that titanium dioxide has both a large specific surface area and resistance to crushing; the dispersant improves the dispersion of titanium dioxide and is not easy to agglomerate.

Description

technical field [0001] The invention relates to the field of production of out-of-stock titanium dioxide, in particular to a production method of stable titanium dioxide with a large specific surface area. Background technique [0002] Titanium dioxide with a large specific surface area has been widely used in catalysts, semiconductors, sensing materials, electronic ceramics and other fields in recent years because of its stable properties, insoluble properties, and low cost. Especially in the development of catalysts, TiO2 is a new type of functional material. , the catalyst using it as a carrier has the advantages of high activity, good selectivity, strong anti-poisoning, good low-temperature activity, adjustable surface acidity and high-temperature reducibility. The huge application potential shown cannot be ignored, and many scholars believe that TiO2 will become the third-generation catalyst carrier after SiO2 and Al2O3. China is rich in titanium resources, and it is o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G23/053
Inventor 荚玉冬韩军军赵义凯
Owner 安徽迪诺环保新材料科技有限公司
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