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A kind of preparation method of titanium dioxide silicon zirconium aluminum ternary coating by chlorination process

A titanium dioxide and chlorination technology, applied in chemical instruments and methods, coatings, inorganic pigment treatment, etc., can solve the problems of complex coating process, inability to achieve weather resistance and dispersibility, difficulty in realization, etc., and achieve improvement. Properties such as weather resistance and chalk resistance, good gloss, the effect of optimizing the dispersion effect

Active Publication Date: 2020-12-04
HEBEI MILSON TITANIUM DIOXIDE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The most widely used inorganic coating at home and abroad is the oxide of silicon, aluminum, zirconium, cerium and manganese, that is, adding an acidic or basic coating agent to a certain concentration of titanium dioxide slurry, and then neutralizing it with alkali or acid. The coating agent is precipitated on the surface of the particles in the form of hydrated oxides under certain conditions, but there are many shortcomings in using a single oxide as a film-forming material, and it cannot meet the requirements for improving weather resistance and dispersibility, so binary or multiple composite coatings
Due to the complexity of the composite coating process and the difficulty in realizing it, there are relatively few researchers at home and abroad.

Method used

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  • A kind of preparation method of titanium dioxide silicon zirconium aluminum ternary coating by chlorination process
  • A kind of preparation method of titanium dioxide silicon zirconium aluminum ternary coating by chlorination process
  • A kind of preparation method of titanium dioxide silicon zirconium aluminum ternary coating by chlorination process

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The preparation method of the titanium dioxide silicon zirconium aluminum ternary coating of the present invention comprises the following steps:

[0020] A. Slurry preparation: use distilled water to prepare titanium dioxide prepared by the chlorination method into a titanium dioxide suspension with a concentration of 500g / L, adjust the pH of the titanium dioxide suspension to 9.5 with a NaOH aqueous solution with a concentration of 100g / L, and then add a dispersant Sodium metasilicate, the amount added is SiO 2 Calculated as TiO in the slurry 2 2.0% of the mass, then stirred at a speed of 300r / min for 20min to prepare a titanium dioxide slurry;

[0021] B. Slurry Grinding: Grind and disperse the titanium dioxide slurry prepared in step A for 60 minutes with a sand mill, and the average particle diameter of the titanium dioxide after grinding is ≤1.0 μm;

[0022] C. Raise the temperature of the slurry: put the titanium dioxide slurry grinded in step B into the coatin...

Embodiment 2

[0027] Include the following steps:

[0028] A. Slurry preparation: use distilled water to prepare titanium dioxide prepared by the chlorination method into a titanium dioxide suspension with a concentration of 550g / L, adjust the pH of the titanium dioxide suspension to 10.0 with a NaOH aqueous solution with a concentration of 150g / L, and then add a dispersant Sodium metasilicate, the amount added is SiO 2 Calculated, is the TiO in the slurry 2 2.5% of the mass, then stirred for 25min at a rotating speed of 350r / min to prepare a titanium dioxide slurry;

[0029] B, slurry grinding: use a sand mill to grind and disperse the titanium dioxide slurry prepared in step A for 70 minutes, and the average particle diameter of the titanium dioxide after grinding is ≤1.0 μm;

[0030] C. Raise the temperature of the slurry: put the titanium dioxide slurry ground into the coating tank in step B, and raise the temperature to 70°C;

[0031] D. Silicon-zirconium-aluminum coating: use a per...

Embodiment 3

[0035] Include the following steps:

[0036] A. Slurry preparation: use distilled water to prepare titanium dioxide prepared by the chlorination method into a titanium dioxide suspension with a concentration of 600g / L, adjust the pH of the titanium dioxide suspension to 10.5 with a NaOH aqueous solution with a concentration of 200g / L, and then add a dispersant Sodium metasilicate, the amount added is SiO 2 Calculated as TiO in the slurry 2 3.0% of the mass, then stirred at a rotating speed of 400r / min for 30min to prepare a titanium dioxide slurry;

[0037] B, slurry grinding: use a sand mill to grind and disperse the titanium dioxide slurry prepared in step A for 80 minutes, and the average particle diameter of the titanium dioxide after grinding is ≤1.0 μm;

[0038] C. Raise the temperature of the slurry: put the titanium dioxide slurry ground into the coating tank in step B, and raise the temperature to 80°C;

[0039] D. Silicon-zirconium-aluminum coating: use a peristal...

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Abstract

The invention relates to a preparation method of a chlorination-process titanium dioxide silicon-zirconium-aluminium ternary coating. The method comprises the steps that 1, distilled water is used forpreparing suspension liquid with a concentration of 500-600 g / L from titanium dioxide, a NaOH aqueous solution is used for adjusting a pH value to be 9.5-10.5, and sodium metasilicate is added for stirring to prepare titanium dioxide slurry; 2, a sand mill is used for conducting grinding and dispersion on the slurry for 60-80 min; 3, the slurry subjected to grinding and dispersion is injected into a coating tank, and temperature is elevated to 60-80 DEG C; 4, a zirconium sulfate aqueous solution and an aluminum sulfate aqueous solution are added in a co-current mode, constant-temperature stirring is conducted, NaOH is used for adjusting a pH value to be 7.0-8.0, and heat preservation, stirring and curing are conducted for 90-120 min; 5, distilled water at 50-60 DEG C is used for filteringand washing cured silicon-zirconium-aluminium coated titanium dioxide; 6, the filtered and washed silicon-zirconium-aluminium ternary coated titanium dioxide is subjected to expansion drying and fluid energy milling to prepare the silicon-zirconium-aluminium ternary coated titanium dioxide. The preparation method of the chlorination process titanium dioxide silicon-zirconium-aluminium ternary coating is simple in technology process, simple and convenient to operate, energy-saving and environmentally friendly, and the titanium dioxide subjected to ternary coating has good glossiness, water dispersibility and weather resistance.

Description

technical field [0001] The invention belongs to the technical field of chemical production, and in particular relates to a preparation method of a ternary coating of titanium dioxide, silicon, zirconium and aluminum by a chloride method. Background technique [0002] Titanium dioxide has excellent whiteness, decolorizing power, weather resistance, heat resistance and chemical stability, especially non-toxic, and can be widely used in coatings, plastics, paper, ink, chemical fiber, rubber, cosmetics, food and medicine and other fields . The main production processes of titanium dioxide are the sulfuric acid method and the chlorination method. The sulfuric acid method is a traditional process. Good quality, chlorine gas can be recycled, the process is simple, intelligent operation can be realized, human resources can be greatly reduced, and it has become the mainstream trend of titanium dioxide production process in the world. [0003] Due to the high photochemical activity ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/36C09C3/06C09D7/62C09D133/00
CPCC01P2002/30C01P2006/22C01P2006/60C08K2003/2241C09C1/3661C09C3/063C09D133/00C09D7/62C08K9/10C08K3/22
Inventor 张千张川张建平
Owner HEBEI MILSON TITANIUM DIOXIDE