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High-purity ultra-fine titanium dioxide prepared from industrial metatitanic acid and preparation method of titanium dioxide

A technology of ultra-fine titanium dioxide and metatitanic acid, which is applied in the direction of titanium dioxide, titanium oxide/hydroxide, nanotechnology, etc., can solve the problems of long process flow, high quality requirements of raw materials, complex process, etc., and achieve the effect of broad application prospects

Active Publication Date: 2017-02-01
天津金玺科技发展有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The titanium alkoxide hydrolysis method has less "three wastes", good product quality, and good process repeatability, but the process is long, there are many hidden safety hazards in production, and the price of auxiliary materials is high, so it is only suitable for laboratory preparation
The direct hydrolysis of titanium tetrachloride has a short process flow and good product quality, but requires high quality raw materials and high production costs
This patent is for the preparation of pigment titanium dioxide, because it needs to add other salts (calcination aids) to reduce its purity, and there are also disadvantages such as high cost and complicated process.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Using the metatitanic acid prepared by hydrolysis in the traditional sulfuric acid titanium dioxide production process as raw material, after washing and bleaching, add deionized water to dilute the beating, and adjust the concentration of metatitanic acid slurry to 210g / L (using TiO 2 mass), and disperse the slurry with a 500W ultrasonic pulverizer for 10 minutes, then add 2.5‰ of polyethylene glycol as a dispersant to fully disperse the metatitanic acid slurry. Transfer the dispersed metatitanic acid slurry into a reactor with stirring heating and condensing reflux, gradually raise the temperature to boiling, keep a slight boiling state for 3 hours, stop the reaction and gradually cool to 60-70°C, use deionized Wash with water, and use ammonium thiocyanate to detect the presence of iron ions, and wash until no iron ions are detected, and the filter cake is purified metatitanic acid. Afterwards, the purified metatitanic acid filter cake was dispersed with deionized wat...

Embodiment 2

[0037] Using the metatitanic acid prepared by hydrolysis in the traditional sulfuric acid titanium dioxide production process as raw material, after washing and bleaching, add deionized water to dilute the beating, and adjust the concentration of metatitanic acid slurry to 340g / L (using TiO 2mass), and disperse the slurry with a 500W ultrasonic pulverizer for 10 minutes, then add dispersant polyethylene glycol 3.3‰ to fully disperse the metatitanic acid slurry. Transfer the dispersed metatitanic acid slurry into a reactor with stirring heating and condensing reflux, gradually raise the temperature to boiling, keep a slight boiling state for 3.5 hours, stop the reaction and gradually cool to 70°C, wash with deionized water while it is hot , and use ammonium thiocyanate to detect the presence or absence of iron ions, wash until no iron ions can be detected, and the filter cake is purified metatitanic acid. Afterwards, the purified metatitanic acid filter cake was dispersed with ...

Embodiment 3

[0039] The metatitanic acid prepared by hydrolysis in the traditional sulfuric acid titanium dioxide production process is used as raw material. After washing and bleaching, deionized water is added to dilute the beating, and the concentration of metatitanic acid slurry is adjusted to 260g / L (using TiO 2 mass), and disperse the slurry with a 500W ultrasonic pulverizer for 10 minutes, then add dispersant polyethylene glycol 3.8‰ to fully disperse the metatitanic acid slurry. Transfer the dispersed metatitanic acid slurry into a reactor with stirring heating and condensing reflux, gradually raise the temperature to boiling, keep a slight boiling state for 4 hours, stop the reaction and gradually cool to 67°C, wash with deionized water while it is hot , and use ammonium thiocyanate to detect the presence or absence of iron ions, wash until no iron ions can be detected, and the filter cake is purified metatitanic acid. Afterwards, the purified metatitanic acid filter cake was disp...

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PUM

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Abstract

The invention relates to a preparation method of titanium dioxide, in particular to a method for preparing high-purity ultra-fine titanium dioxide by industrial metatitanic acid. The method includes the steps: a, beating dispersion: washing and bleaching hydrolyzed metatitanic acid, adding water for dilution, performing beating and ultrasonic dispersion to obtain slurry, adding dispersing agents into the slurry and performing dispersion to obtain metatitanic acid slurry; b, curing: curing the metatitanic acid slurry, cooling the metatitanic acid slurry to 60-70 DEG C, and filtering and washing the metatitanic acid slurry until ferrous ions are removed to obtain a purified metatitanic acid filter cake; c, calcining: adding water to the metatitanic acid filter cake, performing ultrasonic dispersion and calcining, cooling the filter cake to room temperature, and crushing and grinding the filter cake to obtain the titanium dioxide. By the aid of an impurity ion occurrence form in hydrolyzed metatitanic acid particles and composition and structural characteristics of the metatitanic acid, the high-purity ultra-fine titanium dioxide is directly prepared by dispersion, washing, curing, calcining and the like, new varieties of the titanium dioxide can be increased, product application can be functionalized, and the method has a wide application prospect.

Description

technical field [0001] The invention relates to a method for preparing titanium dioxide, in particular to a method for preparing high-purity ultrafine titanium dioxide from industrial metatitanic acid. Background technique [0002] Titanium dioxide has stable physical and chemical properties. It is usually produced in the anatase or rutile crystal form. Because of its excellent optical properties, chemical inertness and high refractive index, it is usually the first choice for white pigments and is widely used in coatings and plastics. , paper, ink, rubber, fiber, ceramics, food additives and many other fields. At the same time, titanium dioxide has semiconductor properties, high dielectric constant and resistivity, and excellent mechanical and electrical properties. Strontium varistors, functionalized titanium dioxide and titanium metal are widely used, and the demand has increased year by year in recent years. [0003] At present, the methods for preparing high-purity ul...

Claims

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Application Information

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IPC IPC(8): C01G23/08B82Y40/00
CPCC01G23/08C01P2004/62C01P2006/80
Inventor 田从学陈华
Owner 天津金玺科技发展有限公司
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