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Inorganic-organic surface treatment method for rutile titanium dioxide

A rutile-type titanium dioxide, surface treatment technology, applied in the direction of inorganic pigment treatment, dyeing organosilicon compound treatment, chemical instruments and methods, etc., can solve the problems of increasing production costs, achieve improved steam powder efficiency, mild reaction conditions, and easy The effect of industrialization

Inactive Publication Date: 2014-04-02
LOMON BILLIONS GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The whole process requires two washings and two pulping, which increases the production cost

Method used

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  • Inorganic-organic surface treatment method for rutile titanium dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Preparation of silicone emulsion: add emulsifier to water, stir evenly, then add silicone, stir evenly, the amount of emulsifier OP-10 added is 0.2-0.6% of silicone, and the finally obtained silicone emulsification The organic silicon content in the liquid is 0.3-2%.

Embodiment 2

[0023] 1. Adjust the concentration of the sanded titanium dioxide slurry to 250g / L, add 0.2% sodium hexametaphosphate, stir evenly, and heat the slurry to 70°C. The amounts of all substances added are based on TiO 2 quality calculation.

[0024] 2. Inorganic treatment: add 0.5-1.0% zirconium oxychloride, then adjust the pH of the slurry to 7 with alkali; then add 2.0-3.0% sodium metaaluminate, and add hydrochloric acid at the same time, control the slurry to adjust the pH to 6.5-7.0 , stirring and homogenizing for 30min.

[0025] 3. Organic treatment: add 0.3% polymethylsiloxane organic coating agent (after emulsification) to the slurry after inorganic coating, the amount of organic coating agent added is generally 0.3%-2%, stir for 30min Finally, it is finished product after pressing, washing with water, flash drying, and jet crushing.

Embodiment 3

[0027] 1. Adjust the concentration of the sanded titanium dioxide slurry to 350g / L, add 0.4% sodium hexametaphosphate, stir evenly, and heat the slurry to 80°C. The amounts of all substances added are based on TiO 2 quality calculation.

[0028] 2. Inorganic treatment: add 1.0-2.5% sodium silicate, then use sulfuric acid to adjust the pH of the slurry to 7.0-7.5; then add 2.0-3.0% sodium metaaluminate, and add hydrochloric acid at the same time, control the slurry to adjust the pH to 6.5 -7.0, stir and homogenize for 30min.

[0029] 3. Organic treatment: add 1% polymethylsiloxane organic coating agent (after emulsification) to the slurry after inorganic coating, the amount of organic coating agent added is generally 0.3%-2%, stir for 40min Finally, it is finished product after pressing, washing with water, flash drying, and jet crushing.

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Abstract

The invention relates to an inorganic-organic surface treatment method for rutile titanium dioxide. The method is characterized by comprising the following steps: (1) regulating the concentration of sanded titanium dioxide slurry to be 250-450g / L, adding 0.2-0.6% of sodium hexametaphosphate, uniformly stirring, and heating the slurry to be 70-90 DEG C; (2) adding an inorganic film coating agent to regulate the slurry to be neutral or alkaline; (3) adding 0.3-2% of emulsified organic silicon film coating agent, stirring for 30-60 minutes, and carrying out filter-press washing, expansion drying and gas stream milling, so as to obtain a finished product.

Description

technical field [0001] The invention relates to a surface treatment method of titanium dioxide, in particular to a method for inorganic and organic surface treatment of rutile titanium dioxide. Background technique [0002] The surface treatment method of titanium dioxide is the most important and most complicated link in the post-treatment process of titanium dioxide. The quality of the surface treatment is directly related to the product performance of titanium dioxide. great influence. [0003] At present, in production, titanium dioxide is generally coated with inorganic coating first, and after the coating is completed, pressure filtration, water washing, drying, steam powder are carried out, and organic surface treatment is carried out during steam powder. At this time, regular and quantitative dripping is generally adopted. The treatment method is to add an organic coating agent. This method has certain shortcomings, that is, it cannot guarantee that the organic coat...

Claims

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Application Information

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IPC IPC(8): C09C1/36C09C3/06C09C3/12
Inventor 陈建立豆君于文军常崇山李瑞瑞卜冬
Owner LOMON BILLIONS GRP CO LTD