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Preparation method of submicron titanium dioxide with controllable particle size

A sub-micron titanium dioxide technology, applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems of short production process automation, slow progress in titanium dioxide production, and large environmental pollution, achieving good repeatability and high production efficiency. The effect of high efficiency and high purity

Pending Publication Date: 2022-08-05
仙桃市中星电子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The sulfuric acid method has a long history of application, and the technology is relatively mature, but the environmental pollution is relatively large, and there are many by-products (titanium white gypsum, ferrous sulfate, etc.), the existing process needs technical upgrading and transformation
Titanium dioxide produced by the chlorination method has better optical and chemical properties, and has the advantages of short production process, continuous operation, high degree of automation, large-scale single-series equipment, and "less discharge of three wastes". From the perspective of process and production safety, it is the future titanium dioxide The general trend of the development of production methods in the white powder industry, but restricted by the technical level, the production of titanium dioxide by chloride method in my country is progressing very slowly

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A preparation method of submicron titanium dioxide with controllable particle size is provided, and the specific steps are as follows:

[0021] (1) Preparation of metatitanic acid precursor: 1.5mol of titanium tetrachloride was added dropwise to 1L of deionized water, stirred, heated to 95°C for hydrolysis reaction for 0.5h, then added with 0.5g of polyacrylic acid, stirred, filtered, Vacuum drying at 105 °C for 12 h to obtain the metatitanic acid precursor.

[0022] (2) Preparation of submicron titanium dioxide powder: place the metatitanic acid precursor obtained in step (1) in a muffle furnace in an air atmosphere, heat treatment at 410 °C for 1 h, continue to heat up to 500 °C for 1 h, and then continue to heat up to 630 °C After heat treatment at ℃ for 1 h, and then naturally cooled to room temperature, all the precursors were converted into pure white submicron titanium dioxide.

[0023] Using scanning electron microscope, transmission electron microscope and las...

Embodiment 2

[0025] A preparation method of submicron titanium dioxide with controllable particle size is provided, and the specific steps are as follows:

[0026] (1) Preparation of metatitanic acid precursor: 2.5mol of titanium tetrachloride was added dropwise to 1L of deionized water, stirred, heated to 105°C for hydrolysis reaction for 2h, then added with 2.5g of polyacrylamide, stirred, filtered, Vacuum-drying at 115°C for 24h to obtain the metatitanic acid precursor.

[0027] (2) Preparation of submicron titanium dioxide powder: place the metatitanic acid precursor obtained in step (1) in a muffle furnace in an air atmosphere, heat treatment at 430 °C for 2 hours, continue to heat up to 540 °C for 2 hours, and then continue to heat up to 680 °C After heat treatment at ℃ for 2 h, and then naturally cooled to room temperature, all the precursors were converted into pure white submicron titanium dioxide.

[0028] Using scanning electron microscope, transmission electron microscope and ...

Embodiment 3

[0030] A preparation method of submicron titanium dioxide with controllable particle size is provided, and the specific steps are as follows:

[0031] (1) Preparation of metatitanic acid precursor: 2.5mol of titanium tetrachloride was added dropwise to 1L of deionized water, stirred, heated to 105°C for hydrolysis reaction for 0.5h, then 2.5g of polyacrylic acid was added, stirred, filtered, Vacuum drying at 115 °C for 12 h to obtain the metatitanic acid precursor.

[0032] (2) Preparation of submicron titanium dioxide powder: place the metatitanic acid precursor obtained in step (1) in a muffle furnace in an air atmosphere, heat treatment at 430 °C for 1 h, continue to heat up to 540 °C for 1 h, and then continue to heat up to 680 °C After heat treatment at ℃ for 1 h, and then naturally cooled to room temperature, all the precursors were converted into pure white submicron titanium dioxide.

[0033] Using scanning electron microscope, transmission electron microscope and las...

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Abstract

The invention discloses a preparation method of submicron titanium dioxide with a controllable particle size, and belongs to the field of inorganic non-metallic materials and new chemical materials. The preparation method comprises the following steps: 1) dropwise adding titanium tetrachloride into deionized water, stirring, hydrolyzing at 95-105 DEG C, adding a process control agent polyacrylic acid or polyacrylamide, stirring, filtering, and drying in vacuum to obtain a metatitanic acid precursor; (2) carrying out three-step heat treatment on the metatitanic acid precursor in an air atmosphere, wherein the first step is 410-430 DEG C heat treatment for 1-2 hours; 2, performing heat treatment at 500-540 DEG C for 1-2 hours; and 3, carrying out heat treatment at 630-680 DEG C for 1-2 hours, and then naturally cooling to room temperature to obtain the submicron titanium dioxide powder. The method is simple in process, relatively high in efficiency, high in yield and good in repeatability; the obtained titanium dioxide is high in purity and uniform in dispersion, the particle size is controllable and adjustable in the submicron scale, and the method is suitable for industrial stable preparation of the submicron high-purity titanium dioxide.

Description

technical field [0001] The invention belongs to the field of inorganic non-metallic materials and new chemical materials, and particularly relates to a preparation method of submicron titanium dioxide with controllable particle size. Background technique [0002] Titanium dioxide, also known as "titanium dioxide", is an important metal oxide, mainly in three crystal forms: rutile, anatase and brookite; brookite is an unstable crystal form, which tends to be rutile at high temperature transformation, less in industrial applications. Titanium dioxide has very stable chemical properties, and has the advantages of excellent optical properties, good weather resistance, high tinting strength, good whiteness, and strong hiding power. It is widely used in coatings, plastics, papermaking, inks, chemical fibers, ceramics, daily chemicals, capacitors, photocatalysis, etc. [0003] There are two main types of industrial production of titanium dioxide: sulfuric acid method and chlorina...

Claims

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Application Information

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IPC IPC(8): C01G23/08C01G23/053
CPCC01G23/08C01G23/0536C01P2004/62C01P2006/80
Inventor 王恒曾义杨小晗李哲成
Owner 仙桃市中星电子材料有限公司
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