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Process for preparing rutile phase titanium dioxide nano-powder

A titanium dioxide and nano-powder technology, applied in the directions of titanium dioxide, nanostructure manufacturing, titanium oxide/hydroxide, etc., can solve the problems of unfavorable industrial production, increase production cost, and high equipment requirements, and achieve easy scale-up experiments and low cost. , the effect of low equipment requirements

Inactive Publication Date: 2005-06-29
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the particle size and shape of nano-rutile can be controlled by controlling the type of solvent and the concentration of solvent, this method not only has high requirements for equipment, but also has high requirements for solvents.
This not only increases production cost, but also is unfavorable for industrialized production

Method used

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  • Process for preparing rutile phase titanium dioxide nano-powder
  • Process for preparing rutile phase titanium dioxide nano-powder
  • Process for preparing rutile phase titanium dioxide nano-powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Fix a three-neck bottle with a capacity of 500mL in an ice water bath, and take pure water (H 2 O) 200mL into a three-necked bottle; install a condenser on the middle mouth of the three-necked bottle and use tap water for condensation; install a contact thermometer on one mouth of the three-necked bottle to monitor and control the temperature of the reaction system; take TiCl 4 Put 100mL into a dry constant pressure separatory funnel, install the constant pressure separatory funnel on the other side of the three-necked flask; under the conditions of magnetic stirring and ice-water bath cooling, turn on the switch of the constant pressure separatory funnel, The titanium chloride solution was slowly dropped into pure water, and the temperature of the entire dropping and mixing process was controlled at about 20°C by controlling the dropping rate and the temperature of the ice water bath; with the addition of titanium tetrachloride, the color of the system gradually change...

Embodiment 2

[0041] (1) Using the equipment described in step (1) in Example 1, take pure water (H 2 O) 300mL into a three-necked bottle; take TiCl 4 100mL into a dry constant pressure separatory funnel; under the conditions of magnetic stirring and ice-water bath cooling, turn on the switch of the constant pressure separatory funnel, slowly drip the titanium tetrachloride solution into pure water, and control the dropping speed and The temperature of the ice-water bath makes the temperature of the whole dripping and mixing process controlled at about 5℃; after the titanium tetrachloride dripping is completed, continue to stir for 2 hours. At this time, the mixed system is a light yellow-green sol. Cool it to room temperature and place it. ;

[0042] (2) Using the equipment described in step (2) in Example 1, after placing the titanium tetrachloride hydrosol for 50 hours, take 100 mL of the above sol and put it into a 500 mL three-necked bottle; take H 2 Put 300mL of O into a dry constant pres...

Embodiment 3

[0046] (1) Using the equipment described in step (1) in Example 1, take pure water (H 2 O) 100mL into a three-necked bottle; take TiCl 4 100mL into a dry constant pressure separatory funnel; under the conditions of magnetic stirring and ice-water bath cooling, turn on the switch of the constant pressure separatory funnel, slowly drip the titanium tetrachloride solution into pure water, and control the dropping speed and The temperature of the ice-water bath makes the temperature of the whole dripping and mixing process controlled at about 30℃; after the titanium tetrachloride dripping is completed, continue to stir for 2 hours. At this time, the mixed system is a light yellow-green sol. Cool it to room temperature and place it. ;

[0047] (2) Using the equipment described in step (2) in Example 1, after placing the titanium tetrachloride hydrosol for 30 hours, take 100 mL of the above sol into a 500 mL three-necked bottle; take H 2 O 350mL is put into a dry constant pressure separ...

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Abstract

The invention relates to a method for preparing titanium dioxide of rutile phase power, which includes the following steps: prepare raw material of titanium tetrachloride to be hydrosol, which is dilute after hydrolyze, heat it to be hydrolyze, generating deposit, filter the deposit which is then washed by water and dried, obtaining the titanium dioxide of rutile phase powder. Its advantages mainly includes: (1) the crystal structure of nanometic power is rutile phase; (2) the titanium dioxide of rutile phase power is average, with good dispersibility and high level of crystallization; (3) only use titanium tetrachloride as crystallization, without any other agent and crystal; (4) it has high productivity, low cost, easy-controllable technical course and is easy to magnify experiment; (5) has fewe requirements for the equipments, suitable for industrialized production.

Description

(1) Technical field [0001] The invention relates to a preparation method of rutile phase titanium dioxide nano powder. (2) Background technology [0002] Titanium dioxide mainly has three crystal structures: brookite, anatase and rutile. Among them, rutile is a thermodynamically stable structure, which has a large dielectric constant, a high refractive index, a strong ultraviolet absorption rate and a strong crushing resistance. Due to its superior physical and chemical properties, nano rutile can be widely used in pigments, cosmetics, fine ceramics, environmental purification photocatalysis, catalyst carriers and dielectric materials. Prior to the present invention, the preparation methods of pure nano-rutile at home and abroad were diverse, and various methods had various deficiencies in different degrees. Representative methods are: [0003] 1. The traditional method. Amorphous TiO 2 Or anatase TiO 2 After being calcined at a high temperature above 450°C, it is transformed int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B82B3/00C01G23/047C01G23/053
Inventor 李国华
Owner ZHEJIANG UNIV OF TECH
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