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Process method of ceria-coated rutile titanium dioxide and coated titanium dioxide

A technology of rutile titanium dioxide and cerium dioxide, which is applied in chemical instruments and methods, inorganic pigment treatment, fibrous fillers, etc., can solve the problems of lack of simplicity and ease of use

Active Publication Date: 2017-07-11
XIANGTAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, based on the idea of ​​using cerium oxide to form an oxide film on the surface of rutile titanium dioxide, there is currently a lack of related technical solutions that are simple, practical, and can guarantee ideal coating effects.

Method used

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  • Process method of ceria-coated rutile titanium dioxide and coated titanium dioxide
  • Process method of ceria-coated rutile titanium dioxide and coated titanium dioxide
  • Process method of ceria-coated rutile titanium dioxide and coated titanium dioxide

Examples

Experimental program
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Effect test

Embodiment 1

[0042] A process for coating rutile titanium dioxide with ceria is provided, comprising the following steps:

[0043] S1. Take rutile-type titanium dioxide, add deionized water, constant volume, and form a slurry;

[0044] S2. Weigh sodium hexametaphosphate and add it to the slurry, and perform ultrasonic dispersion at the temperature of the water bath to obtain a dispersion;

[0045] S3. Add cerium nitrate solution to the dispersion obtained in step S2, and stir evenly to obtain a mixture;

[0046] S4. Add sodium hydroxide solution dropwise to the mixture obtained in step S3, adjust the pH value, and age to obtain the coated slurry;

[0047] S5. Suction filter the coated slurry obtained in step S4, wash the filter cake, and detect the conductivity;

[0048] S6. drying the filter cake obtained in step S5.

[0049] Specifically, combined with the use of experimental instruments and equipment, the operation process is as follows: Weigh rutile titanium dioxide into a volumetri...

Embodiment 2

[0051] Others are the same as in Example 1, except that the concentration of the slurry in the S1 step is 400g L –1 .

Embodiment 3

[0053]Other is with embodiment 1, and difference is that the add-on of sodium hexametaphosphate described in S2 step is 0.2%%.

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Abstract

The invention discloses a process method for coating rutile titanium dioxide with cerium dioxide and the coated titanium dioxide. The present invention creatively uses sodium hexametaphosphate as a dispersant, and conducts scientific and meticulous research and determination on key factors such as dropping rate, dispersant dosage, coating amount, rotational speed, etc., combined with orthogonal experiments to verify and optimize the experiment The steps and operation process obtained the rutile-type titanium dioxide with better surface coating. It has been proved by a large number of long-term experiments that the obtained cerium oxide coating has excellent performance on the rutile-type titanium dioxide, and no separation occurs when it is dispersed in deionized water for more than 25 days. layer phenomenon, and the degradation degree in the UV degradation experiment of rhodamine b does not exceed 0.2%.

Description

technical field [0001] The invention relates to the technical field of coated titanium dioxide production, and more specifically, relates to a process method for coating cerium dioxide-coated rutile-type titanium dioxide and the coated titanium dioxide. Background technique [0002] Rutile titanium dioxide is the world's best white inorganic pigment with strong adhesion and exceptional anti-aging ability. It is widely used in plastics, printing inks, papermaking, automotive paints, outdoor coatings and other industries. However, on the one hand, the rutile titanium dioxide without surface treatment has poor dispersion and is prone to agglomeration. On the other hand, the rutile titanium dioxide particles have photocatalytic activity, and it is easy to deteriorate the weather resistance of the material and cause chalking under ultraviolet irradiation. Phenomenon. [0003] Inorganic surface treatment is to coat a layer of inorganic hydrated oxide on the surface of titanium di...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/36C09C3/06
Inventor 刘平乐侯熠徽侯清麟陈隆
Owner XIANGTAN UNIV