High-dispersed titanium pigment and its production

Abstract

A titanium pigment and its production are disclosed. Anatase titanium dioxide content is <99% and water dispersion is <92% and emulsified dispersant 0.1-0.4% is added. It's simple and cheap, less consumption, excellent coating covering powder and mechanical performance. It's convenient for transportation and storage.

Description

technical field

[0001] The invention belongs to the field of chemical industry, and in particular relates to a preparation method of highly water-dispersible titanium dioxide. Background technique

[0002] Titanium dioxide is one of the most important inorganic pigments and chemical raw materials. Pigment grade titanium dioxide is mainly used in coatings, papermaking, plastics, rubber, latex paint, printing ink, chemical fiber and other industries. Non-pigment grade titanium dioxide is mainly used in enamel, capacitors, welding electrodes, etc. If the water dispersibility of titanium dioxide is not good, it is easy to agglomerate after dispersion in the coating and cause coarsening phenomenon, resulting in stratification; and titanium dioxide with good water dispersibility can make the coating system stable for a long time and facilitate the transportation of the coating And storage and can increase the mechanical properties of the coating film.

[0003] In the Chinese pat...

Examples

Embodiment 1

[0028] Embodiment 1 Preparation of titanium dioxide of the present invention

[0029] The pigment-grade metatitanic acid slurry is beaten into a solution of 200g / L (calculated as titanium dioxide), and 10 liters are taken, and the mass percentage calculated as potassium oxide is added as metatitanic acid (calculated as TiO2). 2 0.35% of potassium sulfate, calculated as phosphorus pentoxide, the mass percent is metatitanic acid (calculated as TiO 2 Total) 0.2% phosphoric acid, mass percent is metatitanic acid (as TiO 2 meter) 0.35% antimony trioxide, stirring. Add ammonia water to adjust the pH value to 8, adding mass percent is metatitanic acid (using TiO 2 Total) 0.4% of oπ-10.

[0030] Thoroughly stir the obtained liquid, filter it, take the filter cake and calcinate it in a resistance furnace at 930°C, and grind it with a three-head grinder for 1 hour to obtain anatase titanium dioxide A.

Embodiment 2

[0031] Embodiment 2 Preparation of titanium dioxide of the present invention

[0032] The pigment-grade metatitanic acid slurry is beaten into a solution with a concentration of 340g / L (calculated as titanium dioxide), and 10 liters are taken, and the mass percentage is added as metatitanic acid (calculated as TiO2). 2 meter) 0.5% potassium sulfate (calculated as potassium oxide), the mass percentage is metatitanic acid (calculated as TiO 2 0.3% phosphoric acid (calculated as phosphorus pentoxide), the mass percentage is metatitanic acid (calculated as TiO 2 meter) 0.35% antimony trioxide, stirring. Add mass percentage and be the urea of ​​titanium dioxide 5%, add mass percentage again and be metatitanic acid (as TiO 2 Total) 0.3% of oπ-10.

[0033] Thoroughly stir the above-mentioned obtained product, filter, take the filter cake and calcinate it in a resistance furnace at 900°C, and grind it with a three-head grinder for 2 hours to obtain anatase titanium dioxide B.

Embodiment 3

[0034] Embodiment 3 Preparation of titanium dioxide of the present invention

[0035] The pigment-grade metatitanic acid slurry is beaten into a solution of 340g / L (in terms of titanium dioxide), and 10 liters are taken, and the mass percentage calculated in terms of potassium oxide is added as metatitanic acid (in terms of TiO2). 2 0.45% potassium sulfate, the mass percent of metatitanic acid (based on TiO 2 Total) 0.28% phosphoric acid, mass percent is metatitanic acid (as TiO 2 meter) 0.45% antimony trioxide, stirring. Add mass percentage and be the ammonium carbonate of titanium dioxide 3%, add mass percentage again and be metatitanic acid (as TiO 2 Total) 0.2% of oπ-10.

[0036] Thoroughly stir the above-mentioned obtained product, filter it, take the filter cake and calcinate it in a resistance furnace at 950°C, and grind it with a three-head grinder for 2 hours to obtain anatase titanium dioxide C.

technical field

[0001] The invention belongs to the field of chemical industry, and in particular relates to a preparation method of highly water-dispersible titanium dioxide. Background technique

[0002] Titanium dioxide is one of the most important inorganic pigments and chemical raw materials. Pigment grade titanium dioxide is mainly used in coatings, papermaking, plastics, rubber, latex paint, printing ink, chemical fiber and other industries. Non-pigment grade titanium dioxide is mainly used in enamel, capacitors, welding electrodes, etc. If the water dispersibility of titanium dioxide is not good, it is easy to agglomerate after dispersion in the coating and cause coarsening phenomenon, resulting in stratification; and titanium dioxide with good water dispersibility can make the coating system stable for a long time and facilitate the transportation of the coating And storage and can increase the mechanical properties of the coating film.

[0003] In the Chinese pat...

Examples

Embodiment 1

[0028] Embodiment 1 Preparation of titanium dioxide of the present invention

[0029] The pigment-grade metatitanic acid slurry is beaten into a solution of 200g / L (calculated as titanium dioxide), and 10 liters are taken, and the mass percentage calculated as potassium oxide is added as metatitanic acid (calculated as TiO2). 2 0.35% of potassium sulfate, calculated as phosphorus pentoxide, the mass percent is metatitanic acid (calculated as TiO 2 Total) 0.2% phosphoric acid, mass percent is metatitanic acid (as TiO 2 meter) 0.35% antimony trioxide, stirring. Add ammonia water to adjust the pH value to 8, adding mass percent is metatitanic acid (using TiO 2 Total) 0.4% of oπ-10.

[0030] Thoroughly stir the obtained liquid, filter it, take the filter cake and calcinate it in a resistance furnace at 930°C, and grind it with a three-head grinder for 1 hour to obtain anatase titanium dioxide A.

Embodiment 2

[0031] Embodiment 2 Preparation of titanium dioxide of the present invention

[0032] The pigment-grade metatitanic acid slurry is beaten into a solution with a concentration of 340g / L (calculated as titanium dioxide), and 10 liters are taken, and the mass percentage is added as metatitanic acid (calculated as TiO2). 2 meter) 0.5% potassium sulfate (calculated as potassium oxide), the mass percentage is metatitanic acid (calculated as TiO 2 0.3% phosphoric acid (calculated as phosphorus pentoxide), the mass percentage is metatitanic acid (calculated as TiO 2 meter) 0.35% antimony trioxide, stirring. Add mass percentage and be the urea of ​​titanium dioxide 5%, add mass percentage again and be metatitanic acid (as TiO 2 Total) 0.3% of oπ-10.

[0033] Thoroughly stir the above-mentioned obtained product, filter, take the filter cake and calcinate it in a resistance furnace at 900°C, and grind it with a three-head grinder for 2 hours to obtain anatase titanium dioxide B.

Embodiment 3

[0034] Embodiment 3 Preparation of titanium dioxide of the present invention

[0035] The pigment-grade metatitanic acid slurry is beaten into a solution of 340g / L (in terms of titanium dioxide), and 10 liters are taken, and the mass percentage calculated in terms of potassium oxide is added as metatitanic acid (in terms of TiO2). 2 0.45% potassium sulfate, the mass percent of metatitanic acid (based on TiO 2 Total) 0.28% phosphoric acid, mass percent is metatitanic acid (as TiO 2 meter) 0.45% antimony trioxide, stirring. Add mass percentage and be the ammonium carbonate of titanium dioxide 3%, add mass percentage again and be metatitanic acid (as TiO 2 Total) 0.2% of oπ-10.

[0036] Thoroughly stir the above-mentioned obtained product, filter it, take the filter cake and calcinate it in a resistance furnace at 950°C, and grind it with a three-head grinder for 2 hours to obtain anatase titanium dioxide C.

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