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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 solvent requirements, and achieve easy scale-up experiments and low cost. , good dispersion effect

Inactive Publication Date: 2006-10-04
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, take pure water (H 2 (2) 200mL is packed in the there-necked bottle; A condenser is installed on the middle port of the there-necked bottle, and utilizes tap water to condense; A junction thermometer is installed on a mouth of the there-necked bottle, to monitor and control the temperature of the reaction system; Take TiCl 4 Put 100mL into a dry constant-pressure separating funnel, and install the constant-pressure separating funnel on the other side port of the three-necked flask; under the condition of magnetic stirring and ice-water bath cooling, turn on the switch of the constant-pressure separating funnel, The titanium chloride solution is slowly dropped into pure water, and the temperature of the entire dropping and mixing process is controlled at about 20°C by controlling the dropping speed and the temperature of the ice-water bath; with the addition of titanium tetrachloride, the color of ...

Embodiment 2

[0041] (1) adopt the device described in step (1) in embodiment 1, get pure water (H 2 (2) 300mL is packed into there-necked bottle; Get TiCl 4 Put 100mL into a dry constant-pressure separating funnel; under the conditions of magnetic stirring and ice-water bath cooling, turn on the switch of the constant-pressure separating funnel, slowly drop the titanium tetrachloride solution into pure water, and control the dropping speed and The temperature of the ice-water bath keeps the temperature of the entire dropping and mixing process at about 5°C; after the addition of titanium tetrachloride 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) adopt the device described in step (2) in embodiment 1, after titanium tetrachloride aqueous sol is placed 50 hours, get 100mL above-mentioned sol and pack in the there-necked bottle of 500mL; Take H 2 Put 0300mL into a dry constant-...

Embodiment 3

[0046] (1) adopt the device described in step (1) in embodiment 1, get pure water (H 2 (2) 100mL is packed into there-necked bottle; Get TiCl 4 Put 100mL into a dry constant-pressure separating funnel; under the conditions of magnetic stirring and ice-water bath cooling, turn on the switch of the constant-pressure separating funnel, slowly drop the titanium tetrachloride solution into pure water, and control the dropping speed and The temperature of the ice-water bath keeps the temperature of the entire dropping and mixing process at about 30°C; after the addition of titanium tetrachloride 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) adopt the device described in step (2) in embodiment 1, after titanium tetrachloride aqueous sol is placed 30 hours, get 100mL above-mentioned sol and pack in the there-necked bottle of 500mL; Take H 2 Put 0350mL into a dry constant...

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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 has three main 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 supports and dielectric materials. Before the present invention, the preparation method of pure nanometer rutile at home and abroad is various, and each method all exists in one way or another deficiency to varying degrees. Representative methods are: [0003] 1. Traditional methods. amorphous TiO 2 or anatase TiO 2 After calcination at a high temperature above 450°C, it tu...

Claims

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Application Information

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