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A kind of preparation technology of low viscosity, highly dispersible titanium dioxide slurry

A titanium dioxide, high dispersibility technology, applied in the treatment of dyed high molecular organic compounds, dyed low molecular organic compounds, fibrous fillers, etc., can solve problems such as product performance degradation, titanium dioxide dispersion, etc., to reduce viscosity and reduce agglomeration Effect

Active Publication Date: 2021-01-05
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

Among them, the more prominent problem is the dispersion of titanium dioxide. For example, the semi-finished product of titanium dioxide is ground, and the surface treatment is carried out after the particle size is qualified. However, the titanium dioxide particles often agglomerate together during this process, which greatly reduces the performance of the product.

Method used

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  • A kind of preparation technology of low viscosity, highly dispersible titanium dioxide slurry
  • A kind of preparation technology of low viscosity, highly dispersible titanium dioxide slurry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The rutile titanium dioxide semi-finished product prepared by the chlorination method is beaten with deionized water to obtain a uniform titanium dioxide slurry product with a mass concentration of 20%, stirred for 10 minutes, and sodium hydroxide lye with a mass concentration of 20% is added to adjust the slurry to the specified After pH4.5 value, stir 10min; Add water-soluble citric acid and sodium polycarboxylate composite solution as dispersant, described water-soluble citric acid and sodium polycarboxylate composite solution are citric acid: sodium polycarboxylate: water mass ratio It is 5:15:80, and its addition accounts for TiO 2 0.2% by weight, stir for 10 minutes, continue to adjust the pH value of the slurry to 8.5 with 20% sodium hydroxide lye, stir for 5 minutes, and detect the slurry with a viscosity of 780mPa.s to provide for the chemical treatment of the next process. Material basis.

Embodiment 2

[0020] The rutile-type titanium dioxide semi-finished product prepared by the chlorination method is beaten with deionized water to obtain a uniform titanium dioxide slurry product with a mass concentration of 25%, stirred for 20 minutes, and sodium hydroxide lye with a mass concentration of 33% is added to adjust the slurry to the specified After pH5.0 value, stir 15min, add water-soluble citric acid and sodium polycarboxylate composite solution as dispersant, described water-soluble citric acid and sodium polycarboxylate composite solution are citric acid: sodium polycarboxylate: water mass ratio It is 10:25:65, and its addition accounts for TiO 2 0.35% by weight, stirred for 15 minutes, continued to adjust the pH value of the slurry to 9.5 with sodium hydroxide lye with a mass concentration of 33%, stirred for 7 minutes, and detected the slurry with a viscosity of 450mPa.s to provide for the chemical treatment of the next process. Material basis.

Embodiment 3

[0022] The rutile titanium dioxide semi-finished product prepared by the chlorination method is beaten with deionized water to obtain a uniform titanium dioxide slurry product with a mass concentration of 30%, stirred for 30 minutes, and sodium hydroxide lye with a mass concentration of 45% is added to adjust the slurry to the specified After pH5.5 value, stir 20min, add water-soluble citric acid and sodium polycarboxylate composite solution as dispersant, described water-soluble citric acid and sodium polycarboxylate composite solution are citric acid: sodium polycarboxylate: water mass ratio It is 6:24:7, and its addition accounts for TiO 2 0.5% by weight, stir for 20 minutes, continue to adjust the pH value of the slurry to 10.5 with sodium hydroxide lye with a mass concentration of 45%, stir for 10 minutes, and detect the slurry with a viscosity of 650mPa.s to provide for the chemical treatment of the next process. Material basis.

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Abstract

The invention provides a preparing technology of low-viscosity and high-dispersibility titanium dioxide slurry. The preparing technology comprises the steps that a semi-finished Rutile titanium dioxide product prepared by using a chlorination method is pulped with deionized water, and a crude titanium dioxide slurry product with the mass concentration of 20-30% is obtained and stirred to be uniform; after an inorganic base solution is added to adjust the pH value to be 4.5-5.5, stirring is conducted to make the mixture uniform; a water-soluble citric acid and sodium polycarboxylate complex solution as a dispersing agent accounts for, by weight, 0.2-0.5% of TiO2 and is added and stirred to be uniform; an inorganic base solution continues to be added to adjust the pH value of the slurry to be 8.5-10.5, and after uniform stirring, the low-viscosity and high-dispersibility titanium dioxide slurry is obtained. The preparing technology has the advantages that the technology is simple and reasonable, through the method that the type of the dispersing agent is changed, and the range of the pH value obtained after the dispersing agent is added, the effect of TiO2 dispersing in a water phaseis improved so as to reduce agglomeration, and the viscosity of the titanium dioxide slurry is reduced.

Description

technical field [0001] The invention relates to a preparation process of a low-viscosity, high-dispersibility titanium dioxide 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 many fields such as coatings, plastics, and papermaking. The dispersion of semi-finished titanium dioxide slurry directly affects the dispersion effect of process products, the storage stability of finished products, the use of downstream products and related application performance. [0003] With the continuous development of my country's economy, the demand for titanium dioxide continues to increase. As the world's largest producer and consumer of titanium dioxide, my country's titanium dioxide industry has always been a "rough and crazy" leader. T...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09C1/36C09C3/06C09C3/08C09C3/10
CPCC09C1/3653C09C1/3669C09C1/3676C09C3/006C09C3/06C09C3/08C09C3/10
Inventor 姜志刚穆宇同王建伟刘立新李冬旭许丽岩赵秀梅
Owner 中信钛业股份有限公司