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Method for coating titanium dioxide Zr-Al based on sulfate method

A technology of titanium dioxide and sulfuric acid method, which is used in chemical instruments and methods, inorganic pigment treatment, fibrous fillers, etc., can solve the problem that the aluminum oxide film cannot cover the surface of titanium dioxide uniformly, and affects the gloss, hiding power and weather resistance of titanium dioxide. It can reduce the performance of titanium dioxide, reduce the application performance of titanium dioxide, etc., to achieve the effect of stable product index, increase chemical inertness, and reduce free energy.

Inactive Publication Date: 2015-02-18
SHANDONG DAWN TITANIUM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of them use zirconium-aluminum coating, usually one-time aluminum coating, the aluminum oxide film cannot cover the surface of titanium dioxide uniformly, and the thickness of the film is uneven, and the product performance is very unstable
Although it has the advantages of improving the weather resistance, hiding power and gloss of titanium dioxide, it has the disadvantage that the zirconium aluminum oxide film wrapped on the surface of titanium dioxide is relatively loose, or even incompletely wrapped, which seriously affects the gloss and hiding of titanium dioxide. Strength and weather resistance, greatly reducing the application performance of titanium dioxide

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A kind of sulfuric acid process titanium dioxide zirconium aluminum coating method is characterized in that, comprises the following processing steps:

[0019] (1) Put the crude titanium dioxide with a concentration of 400g / L in a coated tank and record the volume, start heating and stirring, quickly heat to 50°C, add 5‰ of sodium silicate, and adjust the pH to 9.0;

[0020] (2) Evenly add 0.1% zirconium salt with a concentration of 200g / L within 60min.

[0021] Turn on the steam switch, rapidly raise the temperature to 70°C, and keep stirring for 30 minutes;

[0022] (3) Evenly add 0.6% aluminum salt with a concentration of 150g / L within 30min and stir for 30min;

[0023] (4) Adjust the pH value to 8.5, then add 0.3% sodium hexametaphosphate and stir for 30 minutes;

[0024] (5) Evenly add 0.1% sulfate with a concentration of 150g / L within 20 minutes and stir for 30 minutes, adjust the pH value to 9.5, and fully stir;

[0025] (6) Evenly add 1.0% aluminum salt with...

Embodiment 2

[0030] A kind of sulfuric acid process titanium dioxide zirconium aluminum coating method is characterized in that, comprises the following processing steps:

[0031] (1) Put the crude titanium dioxide with a concentration of 300g / L in a coated tank and record the volume, start heating and stirring, quickly heat to 70°C, add 2‰ of sodium silicate, and adjust the pH to 11.0;

[0032] (2) Evenly add 0.6% zirconium salt with a concentration of 200g / L within 60 minutes, turn on the steam switch after completion, rapidly heat up to 70°C, and keep stirring for 30 minutes;

[0033] (3) Evenly add 0.1% aluminum salt with a concentration of 150g / L within 30min and stir for 30min;

[0034] (4) Adjust the pH value to 8.0, then add 0.3% sodium hexametaphosphate and stir for 30 minutes;

[0035] (5) Evenly add 1.3% sulfate with a concentration of 150g / L within 20 minutes and stir for 30 minutes, adjust the pH value to 11.5, and fully stir;

[0036] (6) Evenly add 0.8% aluminum salt with ...

Embodiment 3

[0042] A kind of sulfuric acid process titanium dioxide zirconium aluminum coating method is characterized in that, comprises the following processing steps:

[0043] (1) Put the crude titanium dioxide with a concentration of 350g / L in a coated tank and record the volume, start heating and stirring, quickly heat to 60°C, add 3.5‰ of sodium silicate, and adjust the pH to 10.0;

[0044] (2) Evenly add 3.5% zirconium salt with a concentration of 200g / L within 60min, turn on the steam switch after completion, rapidly heat up to 70°C, and keep stirring for 30min;

[0045] (3) Evenly add 3.5% aluminum salt with a concentration of 150g / L within 30min and stir for 30min;

[0046] (4) Adjust the pH value to 8.3, then add 0.3% sodium hexametaphosphate and stir for 30 minutes;

[0047] (5) Evenly add 0.7% sulfate with a concentration of 150g / L within 20 minutes and stir for 30 minutes, adjust the pH value to 10.5, and fully stir;

[0048] (6) Evenly add 0.9% aluminum salt with a concen...

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PUM

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Abstract

The invention belongs to the technical field of sulfate method titanium dioxide production process, and in particular relates to a method for coating titanium dioxide Zr-Al based on a sulfate method. The method is characterized in that the method is a new method of adding zircon salt three times, regulating a pH value and sufficiently dispersing; the aluminum oxide film uniformly wraps the surface of the titanium dioxide through precise control, the aluminum oxide film is uniformly covered, the surface free energy of titanium dioxide is lowered, the chemical inertness is increased, the surface character is changed due to compact film, and the application range is greatly improved; and each process in the enveloping process is seriously controlled, the product stability is improved, the wrapped oxide film is compact and uniform, the lustrousness, covering power and weather resistance of titanium dioxide is improved, the product index is stable, and the percent of pass is high.

Description

technical field [0001] The invention belongs to the technical field of sulfuric acid process titanium dioxide production technology, and in particular relates to a zirconium-aluminum coating method for sulfuric acid process titanium dioxide. Background technique [0002] After the titanium dioxide is calcined, a large amount of surface free energy is accumulated on the surface of the particles, and some lattice defects will also appear on the surface of the particles after being pulverized. There are many surface active points, and it is widely used, so a single surface property is difficult to adapt to various occasions. , so it is necessary to reduce the surface free energy of titanium dioxide as much as possible and increase the chemical inertness. The usual practice is to wrap a dense film on the surface of titanium dioxide to change the properties of the surface so as to adapt to different occasions. At present, zirconium-aluminum coating is mostly used, usually one-...

Claims

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Application Information

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IPC IPC(8): C09C1/36C09C3/06
Inventor 郭会良蔡平雄刘丽马文殷红忠李建立
Owner SHANDONG DAWN TITANIUM IND
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