Preparation method of anatase type titanium dioxide

An anatase-type titanium dioxide, anatase-type technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, nanotechnology, etc., can solve the problem of not being able to prepare high-purity anatase-type titanium dioxide, and achieve a controllable particle size range and production The effect of low cost and simple operation

Active Publication Date: 2017-06-20
PANGANG GROUP RESEARCH INSTITUTE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved in the present invention is: the problem that the existing titanium tetrachloride vapor phase oxidation method cannot prepare high-purity anatase titanium dioxide

Method used

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Examples

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preparation example Construction

[0017] The invention provides a kind of preparation method of anatase type titanium dioxide, comprises the following steps:

[0018] a. Preheat oxygen to 850-1050°C through a preheating furnace, and preheat titanium tetrachloride to 750-950°C through another preheating furnace under the protection of nitrogen or argon;

[0019] b. Pass the oxygen preheated in step a and titanium tetrachloride into the reactor at a molar ratio of 2-15:1 at a speed of 0.2-0.4m / s to react, and control the reaction temperature to 850-1050°C , the reaction time is 2-15s; after the reaction, anatase TiO is collected 2 .

[0020] The present invention prepares anatase TiO 2 The key is to preheat the oxygen and titanium tetrachloride gas first, so that the reaction can proceed smoothly. The present invention limits the preheating temperature range of the titanium tetrachloride preheater to 750-950°C, and the temperature is lower than 750°C. It cannot be fully carried out, the temperature is too hig...

Embodiment 1

[0024] Embodiment 1 prepares anatase titanium dioxide with the method of the present invention

[0025] To prepare anatase titanium dioxide, the specific operation steps are as follows:

[0026] a. Preheat oxygen to 850°C through a preheating furnace, and preheat titanium tetrachloride to 750°C through another preheating furnace under the protection of nitrogen or argon;

[0027] b. Pass the oxygen preheated in step a and titanium tetrachloride in a molar ratio of 2:1 into the reactor at a speed of 0.2m / s to react, control the reaction temperature to be 850°C, and the reaction time to be 15s; After the reaction, the anatase TiO was collected 2 .

[0028] In embodiment 1, the obtained TiO 2 99.8% pure, anatase TiO 2 Content is 100%, TiO 2 The particle size is 20-300nm, and the particle size is controllable.

Embodiment 2

[0029] Embodiment 2 prepares anatase titanium dioxide with the method of the present invention

[0030] To prepare anatase titanium dioxide, the specific operation steps are as follows:

[0031] a. Preheat oxygen to 1050°C in a preheating furnace, and preheat titanium tetrachloride to 950°C in another preheating furnace under the protection of nitrogen or argon;

[0032] b. Pass the oxygen preheated in step a and titanium tetrachloride in a molar ratio of 15:1 into the reactor at a speed of 0.4m / s to react, control the reaction temperature to be 1050°C, and the reaction time to be 2s; After the reaction, the anatase TiO was collected 2 .

[0033] In embodiment 2, the obtained TiO 2 99.8% pure, anatase TiO 2 Content is 100%, TiO 2 The particle size is 20-300nm, and the particle size is controllable.

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Abstract

The invention belongs to the technical field of preparation of titanium dioxide and in particular relates to a preparation method of anatase type titanium dioxide. Aiming at the problem that high-purity anatase type titanium dioxide cannot be prepared through an existing titanium tetrachloride gas-phase oxidization method, the invention provides the preparation method of the anatase type titanium dioxide; the preparation method comprises the following steps: a, pre-heating oxygen gas to be 850 DEG C to 1050 DEG C through a pre-heating furnace; pre-heating titanium tetrachloride to 750 DEG C to 950 DEG C through the other pre-heating furnace under the protection of inert gas; b, introducing the oxygen gas and titanium tetrachloride, which are pre-heated in the step a, and reacting; controlling reaction temperature to be 850 DEG C to 1050 DEG C and reaction time to be 2s to 15s; after reacting, collecting to obtain anatase type TiO2. According to the preparation method of the anatase type titanium dioxide, parameters are reasonably matched and the conversion from the anatase type TiO2 to rutile type TiO2 is inhibited, so that the high-purity anatase type TiO2 is obtained; the TiO2 has controllable granularity and high purity; the method provided by the invention has the advantages of simplicity in operation, less tail gas content and low cost and has important economic significance.

Description

technical field [0001] The invention belongs to the technical field of titanium dioxide preparation, and in particular relates to a preparation method of anatase titanium dioxide. Background technique [0002] Titanium dioxide (TiO 2 ) commonly known as titanium dioxide, as a very important raw material in industrial production, widely used in paint, cosmetics (ultraviolet absorbers), plastics, paper, printing inks, chemical fibers, rubber, ceramics, enamel, electronics, food, medicine and other industries. Titanium dioxide has three main crystal forms in nature, namely: brookite type, anatase type and rutile type. In addition to brookite TiO 2 is a metastable state, less studied, around rutile and anatase TiO 2 A lot of research has been done. Rutile TiO 2 Heat resistance, thermal stability, and chemical stability are superior to anatase TiO 2 , can be widely used in coatings, paints, cosmetics, plastics and other fields; when used as photocatalytic materials, anatase...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/07B82Y40/00
CPCC01G23/07C01P2004/62C01P2004/64C01P2006/80
Inventor 杜明陆平周艾然龙盘忠李冬勤李良刘森林周丽
Owner PANGANG GROUP RESEARCH INSTITUTE CO LTD
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