Preparation method of universal titanium dioxide water slurry

A titanium dioxide, general-purpose technology, applied in the field of preparation of general-purpose titanium dioxide water slurry, can solve the problems of slurry layering, viscosity increase, waste of materials, etc., to avoid viscosity increase or serious layering, ensure performance and normal use , the effect of saving energy

Active Publication Date: 2020-04-07
中信钛业股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, for downstream customers in the water-based field, the use of dry powder titanium dioxide still requires beating, dispersing, and grinding processes, which virtually increases the operation process from slurry → dry powder → slurry, and the operation is too cumbersome. Dry powder treatment and dry powder beating process , the powder dust is flying, the material will be lost to a certain extent, and the material will be wasted
Due to the poor storage stability of titanium dioxide slurry, after a period of storage, the viscosity will increase, the slurry will be layered, and the titanium dioxide deposited at the bottom will be hardened, which will seriously affect the application performance of titanium dioxide.

Method used

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  • Preparation method of universal titanium dioxide water slurry
  • Preparation method of universal titanium dioxide water slurry
  • Preparation method of universal titanium dioxide water slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1.1, take by weighing 400g of the primary rutile titanium dioxide powder prepared by the chlorination method, add deionized water to be mixed with a slurry with a mass concentration of 20%, adjust the pH of the slurry to 9.5 with sodium hydroxide solution, add 0.2% (in the form of SiO 2 accounted for TiO 2 by weight) sodium silicate solution, the concentration of sodium silicate solution is SiO 2 Calculated as 100g / L, aging for 20min.

[0031] 1.2. Heat the ground slurry to 60°C and maintain this temperature throughout the coating process.

[0032] 1.3, add 1.0% at one time (as SiO 2 accounted for TiO 2 by weight) sodium silicate solution, its concentration is SiO 2 Calculated at 100g / L, matured for 10 minutes, uniformly adjusted the pH of the slurry to 6.0 with a mass concentration of 5% sulfuric acid solution within 1 hour, and matured for 30 minutes.

[0033] 1.4. Add 1.0% sodium metaaluminate solution (with Al in sodium metaaluminate) at 0.5h 2 o 3 accounted ...

Embodiment 2

[0039] 1.1, take by weighing 400g of the primary rutile titanium dioxide powder prepared by the sulfuric acid method, add deionized water to be mixed with a slurry with a mass concentration of 30%, adjust the pH of the slurry to 11.0 with sodium hydroxide solution, add 0.5% (as SiO 2 accounted for TiO 2 by weight) sodium silicate solution, the concentration of sodium silicate solution is SiO 2 Calculated as 200g / L, aging for 40min.

[0040] 1.2. Heat the ground slurry to 90°C and maintain this temperature throughout the coating process.

[0041] 1.3, add 4.0% at one time (as SiO 2 accounted for TiO 2 by weight) sodium silicate solution, its concentration is SiO 2 Calculated at 200g / L, matured for 30 minutes, uniformly adjusted the pH of the slurry to 7.0 with a mass concentration of 10% hydrochloric acid solution within 3 hours, and matured for 60 minutes.

[0042] 1.4. Add 4.0% potassium metaaluminate solution (as Al in potassium metaaluminate) in 2h 2 o 3 accounted fo...

Embodiment 3

[0048] 1.1, take by weighing 400g of the primary rutile titanium dioxide powder prepared by the chlorination method, add deionized water to be mixed with a slurry with a mass concentration of 25%, adjust the pH of the slurry to 9.5 with sodium hydroxide solution, add 0.3% (in the form of SiO 2 accounted for TiO 2 by weight) sodium silicate solution, the concentration of sodium silicate solution is SiO 2 Calculated as 150g / L, aging for 30min.

[0049] 1.2. Heat the ground slurry to 80°C and maintain this temperature throughout the coating process.

[0050] 1.3, add 2.5% at one time (as SiO 2 accounted for TiO 2 by weight) sodium silicate solution, its concentration is SiO 2 Calculated at 150g / L, aging for 20min, adjusting the pH of the slurry to 6.5 with a nitric acid solution with a mass concentration of 10% within 2h, and aging for 50min.

[0051] 1.4. Add 3.0% sodium metaaluminate solution (with Al in sodium metaaluminate) in 1h 2 o 3 accounted for TiO 2 by weight), ...

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Abstract

The invention relates to a preparation method of a universal titanium dioxide water slurry. The method includes: adding an organic dispersing agent, an inorganic dispersing agent and water into an inorganic coated titanium dioxide filter cake, performing pulping and dispersing, and then carrying out sanding treatment to prepare a titanium dioxide dispersed water slurry; and adding cellulose into the dispersed water slurry, and conducting high speed dispersing to obtain the universal titanium dioxide water slurry. The method has the advantages of simple process and convenient operation. The mixed use of a cellulose thickening agent in cooperation with the inorganic dispersing agent and the organic dispersing agent can reduce layered settlement due to the adsorption and aggregation among particles in the titanium dioxide water slurry and formation of large particles finally, thus preventing the viscosity rise or serious layering of the water slurry from generating hard precipitates, andensuring the performance and normal use of the titanium dioxide water slurry. The method not only can reduce dust flying and material wasting for customers, and save the energy consumption for grinding and dispersion, but also can give full play to dispersity, covering power, high whiteness and other application performance of titanium dioxide, and the prepared universal titanium dioxide water slurry can be applied to paint, papermaking and other water-based fields.

Description

technical field [0001] The invention relates to a method for preparing general-purpose titanium dioxide water slurry in the field of chemical industry. Background technique [0002] Titanium dioxide is the best white pigment, and it is also an important chemical raw material. Because of its excellent optical properties, stable chemical properties, high refractive index and good hiding power, it is widely used in coatings, plastics, paper, ceramics and synthetic fibers. and many other fields. Among them, the use of titanium dioxide in the paint industry accounts for about 60% of the total, and the industry is divided into water-based and oil-based. With the change of the national environmental protection policy, the industry is changing from oil-based to water-based; in addition, the use of titanium dioxide in the paper industry accounts for about 10% of the total, and this industry is basically used in water-based systems. To sum up, the proportion of titanium dioxide used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/36C09C3/06C09C3/10C08K9/08C08K9/02C08K3/22C09D5/02C09D11/037D21H19/38
CPCC01P2004/61C08K3/22C08K9/02C08K9/08C08K2003/2241C08K2201/005C09C1/3653C09C1/3661C09C1/3676C09C1/3692C09C3/006C09C3/06C09C3/063C09C3/10C09D5/028C09D11/037D21H19/385
Inventor 姜志刚王建伟刘立新穆宇同任健梁职张炳许丽岩杨平
Owner 中信钛业股份有限公司
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