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Rare earth composite coated titanium dioxide as well as preparation method and application thereof

A rare earth composite, titanium dioxide technology, applied in the application, chemical instruments and methods, household appliances, etc., can solve the problems of insufficient light resistance, yellowing, etc., and achieve the effect of good dispersion

Inactive Publication Date: 2020-12-29
ANHUI JXTB GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problem that the light resistance of existing titanium dioxide is not good enough, yellowing and darkening after a long time of use can no longer meet the requirements in some application fields, the present invention provides a rare earth composite coated titanium dioxide and its preparation method and application to improve the light resistance of titanium dioxide

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  • Rare earth composite coated titanium dioxide as well as preparation method and application thereof
  • Rare earth composite coated titanium dioxide as well as preparation method and application thereof
  • Rare earth composite coated titanium dioxide as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The preparation method of the rare earth composite coated titanium dioxide in this embodiment includes pulping, roller mill dry grinding, inorganic surface treatment, washing, drying, jet milling and packaging, specifically including the following steps:

[0042] Step S101, the crude titanium dioxide is pulverized by a roller mill and then enters the beating tank, and at the same time, desalted water and dispersant are added, and stirred evenly to obtain a crude titanium dioxide slurry, which is then wet-milled by a ball mill, and subjected to cyclone classification , the qualified slurry is transferred to the next process, and the unqualified slurry is transferred back to the beating tank for circular grinding, requiring control of 325 mesh sieve; the concentration of titanium dioxide crude product slurry is controlled at 900g / L, and the cyclone pressure is 0.4 MPa, 0.4% of residue on 325 mesh sieve after cyclone; dispersant is PAAS, and the addition amount is controlle...

Embodiment 2

[0054] The preparation method of the rare earth composite coated titanium dioxide of the present embodiment specifically comprises the following steps:

[0055] Step S101, the crude titanium dioxide is pulverized by a roller mill and then enters the beating tank, and at the same time, desalted water and dispersant are added, and stirred evenly to obtain a crude titanium dioxide slurry, which is then wet-milled by a ball mill, and subjected to cyclone classification , the qualified slurry is transferred to the next process, and the unqualified slurry is transferred back to the beating tank for circular grinding, requiring control of 325 mesh sieve residue; the concentration of the crude titanium dioxide slurry is controlled at 700g / L, and the cyclone pressure is 0.25 MPa, 0.5% of residue on 325 mesh sieve after cyclone; dispersant is hexametaphosphoric acid, and the addition is controlled at 0.2%;

[0056] Step S102, grind the slurry obtained in step S101 through a sand mill; a...

Embodiment 3

[0067]The preparation method of the rare earth composite coated titanium dioxide of the present embodiment specifically comprises the following steps:

[0068] Step S101, the crude titanium dioxide is pulverized by a roller mill and then enters the beating tank, and at the same time, desalted water and dispersant are added, and stirred evenly to obtain a crude titanium dioxide slurry, which is then wet-milled by a ball mill, and subjected to cyclone classification , the qualified slurry is transferred to the next process, and the unqualified slurry is transferred back to the beating tank for circular grinding, requiring control of 325 mesh sieve residue; the concentration of the crude titanium dioxide slurry is controlled at 800g / L, and the cyclone pressure is 0.3 MPa, 0.4% residue on 325 mesh sieve after swirl; dispersant is PAAS, and the addition amount is controlled between 0.8%;

[0069] Step S102, grind the slurry obtained in step S101 through a sand mill; and carry out s...

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Abstract

The invention discloses rare earth composite coated titanium dioxide as well as a preparation method and application thereof, and belongs to the technical field of titanium dioxide production. The method comprises the following steps: a titanium dioxide crude product is crushed by a rolling mill and then enters a pulping tank, desalted water and a dispersing agent are added at the same time, uniform stirring is performed to prepare titanium dioxide crude product slurry, and the obtained slurry is subjected to wet grinding by a ball mill; grinding the slurry by a sand mill; transferring the ground slurry into a surface treatment tank for inorganic surface treatment; transferring the obtained slurry into a plate-and-frame filter press for filter pressing, and washing with desalted water to obtain a filter cake; and drying the filter cake to obtain a titanium dioxide material, and carrying out organic coating on the titanium dioxide material through a jet milling process to obtain a titanium dioxide finished product. Compared with a conventional product, the titanium dioxide prepared by the preparation method disclosed by the invention is better in whiteness and stronger in light resistance, and has better application performance in an application system.

Description

technical field [0001] The invention belongs to the technical field of titanium dioxide production, and more specifically relates to a rare-earth composite-coated titanium dioxide and its preparation method and application. Background technique [0002] TiO 2 Commonly known as titanium dioxide, it is the most widely used high-grade white pigment in the world, mainly used in coatings, plastics, papermaking, chemical fiber, food and daily chemicals and other fields. The crystal forms of titanium dioxide include the following three types: rutile, anatase and brookite. Among them, the rutile type is the most stable crystal form of titanium dioxide. Its structure is compact, and compared with other crystal types, it has a wider range of applications and a better reputation. Because of its excellent optical properties, rutile type titanium dioxide has become the best white pigment. [0003] However, since titanium dioxide is extracted from titanium ore, impurity ions are indispe...

Claims

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Application Information

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IPC IPC(8): C09C1/36C09C3/04C09C3/06C08K9/10C08K3/22C09D7/62D21H17/69C09D11/037
CPCC08K3/22C08K9/10C08K2003/2241C09C1/3692C09C3/006C09C3/041C09C3/063C09D11/037C09D7/62D21H17/675D21H17/69
Inventor 张本发张修臻
Owner ANHUI JXTB GRP
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