Method for producing special rutile type titanium white powder for power coating

Abstract

The invention discloses a method for producing special rutile type titanium white powder for power coating, which comprises the following steps of: preparing slurry of which titanium dioxide concentration is 300 to 400g / l by using bleached metatitanic acid, and adding a calcining auxiliary agent into the slurry; filtering the obtained metatitanic acid, then calcining solid, and grinding the solidto obtain a primary product; preparing titanium dioxide slurry of which titanium dioxide concentration is 650 to 850g / l by using the obtained primary product, adding a wetting agent into the titaniumdioxide slurry, and performing dispersion and grinding; heating the obtained titanium dioxide slurry to between 40 and 90 DEG C, adding dispersant, zircon salt or titanium salt, silicon salt and aluminum salt into the slurry in turn, adjusting the pH value to between 5 and 9, ageing the mixture, and adjusting the pH value to between 7 and 8; and then filtering, washing and drying the mixture, treating the dried product by an organic surface treatment agent, and vaporizing the product to obtain the rutile type titanium white powder. Compared with the prior art, the rutile type titanium white powder obtained by the method has the properties of stable crystal lattice, good dispersion, heat and yellowing resistance, and good oily whiteness, reducing power, covering power and weather resistance and the like; the appearance and properties of the rutile type titanium white powder are close to that of the rutile type titanium white powder prepared by a chlorination process; and the productionmethod has the advantages of easily obtained process raw materials and stable process control.

Description

technical field

[0001] The invention belongs to the field of chemical production, and specifically relates to a method for producing rutile-type titanium dioxide special for powder coatings. Background technique

[0002] During the production and use of coatings, a large amount of VOC (Volatile Organic Compounds) has attracted great attention from relevant state departments and the general public. appear. In the future, environmentally friendly coatings including water-based coatings and powder coatings will gradually replace traditional solvent-based coatings and become the leading products in the market. The environmental protection, energy saving and economic performance of powder coatings will continue to be recognized and accepted by people, and will eventually become the first choice of coatings in industrial, civil, construction and other fields.

[0003] At present, there is no prior art of special rutile titanium dioxide for powder coatings. The titanium dioxide u...

Examples

Embodiment 1

[0033] After rinsing, metatitanic acid beating is made into a slurry with a titanium dioxide concentration of 300g / l, and the addition concentration is 100g / l (in the form of TiO 2 Calculated) Calcined seed crystals, the amount added is calculated as TiO 2 Calculated as TiO 2 Measure 2% of the mass of metatitanic acid, stir for 5 minutes, and add a concentration of 300g / l (in K 2 O) Potassium carbonate solution, its addition is in K 2 O is calculated as TiO 2 Calculate 0.1% of the mass of metatitanic acid, stir for 5min, add 300g / l (in P 2 o 5 meter) phosphoric acid, the amount of which is added in P 2 o 5 Calculated as TiO 2 Measure 0.15% of the mass of metatitanic acid, stir for 5 minutes, and add a zinc sulfate solution with a concentration of 100g / l (calculated as ZnO), the amount of which is calculated as ZnO and calculated as TiO 2 Calculate 0.5% of the mass of metatitanic acid, stir for 5 minutes, add a magnesium chloride solution with a concentration of 100g / l ...

Embodiment 2

[0039] After rinsing, metatitanic acid beating is made into a slurry with a titania concentration of 350g / l, and the addition concentration is 100g / l (in the form of TiO 2 Calculated) Calcined seed crystals, the amount added is calculated as TiO 2 Calculated as TiO 2 Measure 6% of the mass of metatitanic acid, stir for 5 minutes, and add a concentration of 300g / l (in K 2 O meter) Potassium sulfate solution, its addition is in K 2 O is calculated as TiO 2 Measure 0.5% of the mass of metatitanic acid, stir for 5min, add 300g / l (in P 2 o 5 meter) ammonium phosphate, the amount of which is added in P 2 o 5 Calculated as TiO 2 Measure 0.10% of the mass of metatitanic acid, stir for 5 minutes, and add magnesium sulfate solution with a concentration of 100g / l (calculated as MgO), and the amount added is calculated as MgO and calculated as TiO 2 Calculate 0.3% of the mass of metatitanic acid and stir for 90 minutes;

[0040] After the salt treatment, the metatitanic acid is f...

Embodiment 3

[0045] After rinsing, metatitanic acid beating is made into a slurry with a titanium dioxide concentration of 400g / l, and the addition concentration is 100g / l (in the form of TiO 2 Calculated) Calcined seed crystals, the amount added is calculated as TiO 2 Calculated as TiO 2 Measure 4% of the mass of metatitanic acid, stir for 5 minutes, and add a concentration of 300g / l (in K 2 O) Potassium chloride solution, the amount of which is added in K 2 O is calculated as TiO 2 Calculate 0.3% of the mass of metatitanic acid, stir for 5min, add 300g / l (in P 2 o 5 meter) ammonium monohydrogen phosphate, the amount of which is added in P 2 o 5 Calculated as TiO 2 Calculate 0.08% of the mass of metatitanic acid, stir for 5 minutes, add a magnesium chloride solution with a concentration of 100g / l (calculated as MgO), and the amount added is calculated as MgO and calculated as TiO 2 Calculate 0.2% of the mass of metatitanic acid and stir for 90 minutes;

[0046] After the salt tre...

technical field

[0001] The invention belongs to the field of chemical production, and specifically relates to a method for producing rutile-type titanium dioxide special for powder coatings. Background technique

[0002] During the production and use of coatings, a large amount of VOC (Volatile Organic Compounds) has attracted great attention from relevant state departments and the general public. appear. In the future, environmentally friendly coatings including water-based coatings and powder coatings will gradually replace traditional solvent-based coatings and become the leading products in the market. The environmental protection, energy saving and economic performance of powder coatings will continue to be recognized and accepted by people, and will eventually become the first choice of coatings in industrial, civil, construction and other fields.

[0003] At present, there is no prior art of special rutile titanium dioxide for powder coatings. The titanium dioxide u...

Examples

Embodiment 1

[0033] After rinsing, metatitanic acid beating is made into a slurry with a titanium dioxide concentration of 300g / l, and the addition concentration is 100g / l (in the form of TiO 2 Calculated) Calcined seed crystals, the amount added is calculated as TiO 2 Calculated as TiO 2 Measure 2% of the mass of metatitanic acid, stir for 5 minutes, and add a concentration of 300g / l (in K 2 O) Potassium carbonate solution, its addition is in K 2 O is calculated as TiO 2 Calculate 0.1% of the mass of metatitanic acid, stir for 5min, add 300g / l (in P 2 o 5 meter) phosphoric acid, the amount of which is added in P 2 o 5 Calculated as TiO 2 Measure 0.15% of the mass of metatitanic acid, stir for 5 minutes, and add a zinc sulfate solution with a concentration of 100g / l (calculated as ZnO), the amount of which is calculated as ZnO and calculated as TiO 2 Calculate 0.5% of the mass of metatitanic acid, stir for 5 minutes, add a magnesium chloride solution with a concentration of 100g / l ...

Embodiment 2

[0039] After rinsing, metatitanic acid beating is made into a slurry with a titania concentration of 350g / l, and the addition concentration is 100g / l (in the form of TiO 2 Calculated) Calcined seed crystals, the amount added is calculated as TiO 2 Calculated as TiO 2 Measure 6% of the mass of metatitanic acid, stir for 5 minutes, and add a concentration of 300g / l (in K 2 O meter) Potassium sulfate solution, its addition is in K 2 O is calculated as TiO 2 Measure 0.5% of the mass of metatitanic acid, stir for 5min, add 300g / l (in P 2 o 5 meter) ammonium phosphate, the amount of which is added in P 2 o 5 Calculated as TiO 2 Measure 0.10% of the mass of metatitanic acid, stir for 5 minutes, and add magnesium sulfate solution with a concentration of 100g / l (calculated as MgO), and the amount added is calculated as MgO and calculated as TiO 2 Calculate 0.3% of the mass of metatitanic acid and stir for 90 minutes;

[0040] After the salt treatment, the metatitanic acid is f...

Embodiment 3

[0045] After rinsing, metatitanic acid beating is made into a slurry with a titanium dioxide concentration of 400g / l, and the addition concentration is 100g / l (in the form of TiO 2 Calculated) Calcined seed crystals, the amount added is calculated as TiO 2 Calculated as TiO 2 Measure 4% of the mass of metatitanic acid, stir for 5 minutes, and add a concentration of 300g / l (in K 2 O) Potassium chloride solution, the amount of which is added in K 2 O is calculated as TiO 2 Calculate 0.3% of the mass of metatitanic acid, stir for 5min, add 300g / l (in P 2 o 5 meter) ammonium monohydrogen phosphate, the amount of which is added in P 2 o 5 Calculated as TiO 2 Calculate 0.08% of the mass of metatitanic acid, stir for 5 minutes, add a magnesium chloride solution with a concentration of 100g / l (calculated as MgO), and the amount added is calculated as MgO and calculated as TiO 2 Calculate 0.2% of the mass of metatitanic acid and stir for 90 minutes;

[0046] After the salt tre...