Zirconium-aluminum composite inorganic surface treatment method of titanium dioxide

A titanium dioxide and surface treatment technology, which is applied in the direction of inorganic pigment treatment, dyeing low-molecular organic compound treatment, chemical instruments and methods, etc., can solve problems such as degraded product performance, achieve cost saving, reduce acid and alkali consumption, and save washing water. Effect

Active Publication Date: 2014-04-30
四川金雅汇科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for the commonly used zirconium-aluminum coating process, due to the additional addition of acid and alkali, a large number of by-products will inevitably be generated in the system, and these by-products need a large amount of washing water to be cleaned.
In addition, if these by-products are not washed cleanly, they will also degrade the performance of the product (eg, resistivity, etc.)

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0031] Titanium dioxide was beaten into a slurry of 280 g / L, and the pH was adjusted in the range of 9.5 to 10.0. Add sodium hexametaphosphate dispersant to the slurry, the amount of dispersant is 0.3% of titanium dioxide. Sand the slurry through a sand mill; raise the temperature of the sand-milled slurry to 45°C under stirring; under stirring, slowly add 100g / L zirconium sulfate solution to the slurry within 30 minutes, the amount of zirconia added It is 0.3% of the amount of titanium dioxide, and it is kept warm for 30 minutes after the feeding is completed. Further raise the temperature of the slurry to 60°C; maintain the stirring state, add sodium metaaluminate to the slurry within 90 minutes, when the pH of the system reaches 9.3-10.0, add aluminum sulfate to the system at the same time to maintain the pH of the system in the range of 9.5-9.8, add After the end, keep warm for 30 minutes, and control the total amount of alumina added at 2.0% to 3.0%; add aluminum sulfate...

example 2

[0034] Titanium dioxide was beaten into a 320g / L slurry. Add monoisopropanolamine dispersant to the slurry, the amount of dispersant is 0.5% of titanium dioxide, and adjust the pH in the range of 9.5 to 10.0. Sand the slurry through a sand mill. The sand-milled slurry was heated to 50°C under stirring. In the stirring state, slowly add 100g / L zirconium chloride solution to the slurry within 45 minutes, the amount of zirconia added is 0.5% of the amount of titanium dioxide, and keep warm for 50 minutes after the addition. Further raise the temperature of the slurry to 60°C; maintain the stirring state, add potassium metaaluminate to the slurry within 90 minutes, when the pH of the system reaches 9.3-10.0, add aluminum chloride to the system at the same time to maintain the pH of the system in the range of 9.5-9.8, Keep warm for 40 minutes after feeding, and the total amount of alumina added is controlled at 2.5% to 3.5%. Add aluminum chloride to the system within 10-30 minut...

example 3

[0037]Titanium dioxide is beaten into a slurry of 100 g / L, and the pH is adjusted in the range of 9.0 to 9.5. Add sodium hexametaphosphate dispersant to the slurry, the amount of dispersant is 0.3% of titanium dioxide. Sand the slurry through a sand mill; raise the temperature of the sand-milled slurry to 55°C under stirring; under stirring, slowly add 100g / L zirconium sulfate solution to the slurry within 60 minutes, the amount of zirconia added It is 3.0% of the amount of titanium dioxide, and the temperature is kept for 60 minutes after the feeding is completed. Further raise the temperature of the slurry to 65°C; maintain the stirring state, add sodium metaaluminate to the slurry within 120 minutes, when the pH of the system reaches 9.3-10.0, add aluminum sulfate to the system at the same time to maintain the pH of the system in the range of 9.5-9.8, add After the completion of the heat preservation for 60 minutes, the total amount of alumina added was controlled at 5.5% ...

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PUM

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Abstract

The invention provides a zirconium-aluminum composite inorganic surface treatment method of titanium dioxide. The zirconium-aluminum composite inorganic surface treatment method comprises the following steps: beating titanium dioxide into slurry with the pH value of 9.0-10; adding a dispersing agent; grinding; stirring, and heating to 45-60 DEG C; stirring, adding an acidic zirconium salt, carrying out heat preservation, and curing, wherein the addition amount of the acidic zirconium salt accounts for 0.3-5.5% of the weight of titanium dioxide in the slurry based on zirconium oxide; heating the slurry to 55-65 DEG C; stirring, slowly adding an alkaline aluminum salt, when the pH value of the slurry system reaches 9.3-10.0, adding a first acidic aluminum salt to the slurry system so as to maintain the pH value at 9.3-10.0, carrying out heat preservation, and curing, wherein the total addition amount of the alkaline aluminum salt, and the first acidic aluminum salt accounts for 1.5-10% of the weight of titanium dioxide in the slurry based on aluminum oxide; adding a second acidic aluminum salt so as to control the pH value at 6.5-7.8; filtering and washing, thus obtaining treated titanium dioxide. The zirconium-aluminum composite inorganic surface treatment method has the advantages that the using amount of acid and base can be reduced, washing water is saved, and the purpose of saving cost is achieved.

Description

technical field [0001] The invention relates to the technical field of titanium dioxide surface treatment, in particular to a method for performing zirconium-aluminum composite inorganic surface treatment on titanium dioxide. Background technique [0002] Generally, rutile titanium dioxide is widely used in coatings, plastics, cosmetics and other fields due to its excellent weather resistance and pigment properties. [0003] However, the weather resistance and dispersibility of titanium dioxide are affected to some extent due to surface defects. In order to improve the weather resistance and dispersibility of titanium dioxide, it is usually necessary to carry out inorganic surface treatment on titanium dioxide. According to different uses of titanium dioxide, different inorganic surface treatments are used. General-purpose titanium dioxide often uses zirconium-aluminum composite inorganic surface treatment or silicon-aluminum inorganic surface treatment. [0004] The commo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/36C09C3/04C09C3/06C09C3/08
Inventor 吴健春杜剑桥李礼任亚平路瑞芳
Owner 四川金雅汇科技有限公司
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