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Preparation for high-purity zinc oxide powder

A technology of zinc oxide powder and zinc oxide, applied in the direction of zinc oxide/zinc hydroxide, etc., can solve the problems of high production cost, high equipment requirements, low product purity, etc., and achieve the effect of low cost, low cost and simple process

Active Publication Date: 2005-05-11
河北恒博新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods generally have high requirements for equipment, low product purity, and high production costs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Sunscreen in the cosmetics industry: Studies have shown that zinc oxide high-purity ultra-fine powder has a strong ability to absorb ultraviolet rays and has a shielding effect on UVA (long-wave 320-400nm) and UVB (medium-wave 280-320nm). In the traditional cosmetics market, nano-titanium oxide is used for UVB protection, and organic matter is used for UVA protection. However, the new trend is to replace organic matter with nano-zinc oxide. Compared with organic sunscreens, it is not only non-toxic, odorless, non-irritating to the skin, does not decompose and does not deteriorate, has good thermal stability, and is white in itself, only needs simple coloring, and the price is relatively cheap, so it has become more popular in the sunscreen cosmetics market. favored. In this application, the content of zinc oxide is required to be above 99.99%, and the content of heavy metals such as lead is required to be as low as possible. In the preparation process, select zinc powd...

Embodiment 2

[0022] Antibacterial additives: The active oxygen and hydroxyl radicals generated by the photochemical reaction of high-purity ultrafine zinc oxide powder have strong chemical activity, and can oxidize with various organic substances, including organic substances in bacteria, and decompose them into inorganic substances. Harmful inorganic substances, thus killing most bacteria and viruses. In this application, the content of zinc oxide is required to be above 99.9%, and the content of heavy metals such as lead is required to be as low as possible. In the preparation process, select zinc powder (-100 mesh) with a purity of more than 99.99%, add deionized water, and carry out hydrolysis reaction in a ball mill barrel lined with zirconia. The ball milling medium is zirconia balls, and the ball-to-material ratio is 1:5. In the initial stage of ball milling, add ammonia water to adjust the pH value above 10, and react for 10 hours. The reaction product is a mixture of white zinc hy...

Embodiment 3

[0024] Rubber additives: Zinc oxide is a raw material for manufacturing high-speed wear-resistant rubber products, such as aircraft tires and radial tires, which play the role of anti-aging, anti-friction and ignition, and prolonging the life of products. The rubber industry consumes nearly 50% of the output of zinc oxide, and zinc oxide is an indispensable additive in the rubber industry. For a long time, only the indirect method of zinc oxide can meet the needs of this field. The high-purity ultra-fine zinc oxide powder produced by this method can replace ordinary and active zinc oxide, and can not only be used as vulcanization activator, reinforcing agent, coloring agent of white rubber, vulcanizing agent of chloroprene rubber and compound for enhancing thermal conductivity of rubber products. agent, and it works very well. The ultra-fine zinc oxide powder can significantly increase the thermal conductivity and elasticity of the rubber compound, improve the wear resistance ...

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Abstract

Production for high purity zinc oxide powder is carried out by: 1) mixing zinc powder with pure water, and grinding in ball mill; 2) adding ammonia water to adjust reacting speed, zinc powder hydrolyzing reacting with water to generate insoluble zinc hydroxide; 3) zinc hydroxide dehydrating treating to obtain high purity zinc oxide powder. Its advantages include low cost, simple process and high purity.

Description

technical field [0001] The invention relates to a method for preparing high-purity zinc oxide powder, in particular to a method for preparing high-purity zinc oxide powder by organically combining mechanical ball milling and chemical reaction. Background technique [0002] Zinc oxide ultrafine powder is not only a functional material itself, but also provides a prospect for the compounding and development of new functional materials. Zinc oxide is an essential additive in rubber cable, chemical fertilizer, medicine, electronics, ceramics, chemical fiber, petrochemical, optical and food industries. At present, the preparation methods of ultrafine zinc oxide powder mainly include chemical methods and physical methods. Chemical methods include sol-gel method, hydrothermal synthesis method, organic liquid phase synthesis method, direct precipitation method and solid phase coordination chemical method, etc. These methods all need to add a lot of external substances to dissolve,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02
Inventor 骆树立
Owner 河北恒博新材料科技股份有限公司
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