High-activity nano zinc oxide and preparation method thereof

A nano-zinc oxide, high-activity technology, applied in the direction of zinc oxide/zinc hydroxide, nanotechnology, nanotechnology, etc., can solve problems such as agglomeration, increasing the amount of zinc oxide, and polluting the environment

Pending Publication Date: 2017-11-10
JIYUAN LUTAI NANO MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the specific surface area of ​​most highly active nano zinc oxide is 40-50㎡ / g, and the performance is not stable
When such zinc oxide is applied to rubber production, phenomena such as difficult dispersion and agglomeration of zinc oxide are prone to occur, and the amount of zinc oxide is increased, resulting in a large amount of residual zinc in the rubber compound, which not only wastes zinc resources, but also extremely polluted the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0017] A preparation method of highly active nano-zinc oxide, comprising:

[0018] First, mix the pure zinc sulfate solution and the soda ash solution with a weight ratio of 1:1.1~1.5, and then carry out the neutralization operation at a temperature of 70~80°C, and adjust the Zn in the solution after the neutralization operation. 2+ A mixed solution is obtained after the content is less than 1.5g / L. Zn in the resulting mixture 2+ The content of is effectively controlled, which provides sufficient guarantee for the later preparation of highly active nano-zinc oxide.

[0019] As a preferred solution, adjusting the concentration of the pure zinc sulfate solution to 100-120 g / L is also included before the neutralization operation. Of course, in other embodiments of the present invention, the concentration of the pure zinc sulfate solution can also be selected according to requirements, which is not limited in the present invention.

[0020] Specifically, in the neutralization r...

Embodiment 1

[0038] This embodiment provides a kind of highly active nano-zinc oxide, which is prepared by the following method:

[0039] First, mix the pure zinc sulfate solution and the soda ash solution with a weight ratio of 1:1.1, then carry out the neutralization operation at a temperature of 70°C, and adjust the Zn in the solution after the neutralization operation. 2+ The mixed solution was obtained after the content of 1.4g / L.

[0040] Secondly, the mixture is hydraulically filtered and separated to obtain basic zinc carbonate.

[0041] Then, wash away the sulfate group in the basic zinc carbonate, and press filter to obtain a basic zinc carbonate filter cake with a water content of 25%.

[0042] Next, dry the basic zinc carbonate filter cake with a water content of 25% to obtain powdery basic zinc carbonate, and then flash the powdery basic zinc carbonate under hot air at a temperature of 600°C formed after natural gas combustion Steamed and calcined.

Embodiment 2

[0044] The difference between the preparation method of a kind of highly active nano-zinc oxide provided in this embodiment and the preparation method of high-activity nano-zinc oxide provided in Example 1 is:

[0045] First, slowly add 1 to 2 parts of concentrated sulfuric acid in parts by weight to 5 to 8 parts of water to form a mixture, and after the temperature rises to 55°C, add 0.5 parts of sulfuric acid to the mixture twice, each time Zinc powder and stirred for 1 h to prepare a pure zinc sulfate solution.

[0046] Secondly, the temperature of the zinc sulfate solution was raised to 80°C, and the pH value of the solution was adjusted to 5.0, and then potassium permanganate with a concentration of 0.1moL / L was added until the Mn 2+ The iron slag and manganese slag are filtered out after stopping.

[0047] Next, after heating the solution after filtering out iron slag and manganese slag to 50°C, add concentrated sulfuric acid to adjust the pH of the solution to 3.5, add...

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Abstract

The invention provides high-activity nano zinc oxide and a preparation method thereof, and relates to the technical field of nano oxidant preparation. The preparation method of the high-activity nano zinc oxide comprises the following steps: mixing a pure zinc sulfate solution with a sodium carbonate solution in a weight ratio of 1:(1.1-1.5), performing neutralization operation at 70-80 DEG C, and adjusting the content of Zn<2+> in the solution to be less than 1.5g/L so as to obtain a mixed solution; performing press filtration on the mixed solution, and separating the mixed solution so as to obtain basic zinc carbonate; washing off sulfate radicals in the basic zinc carbonate, and performing pressing filtration so as to obtain basic zinc carbonate filter cakes of which the water content is 25-35%; drying the basic zinc carbonate filter cakes so as to obtain powder basic zinc carbonate, and performing flash calcining at 600-700 DEG C. The preparation method is good in operability, and in addition preparation raw materials can be effectively saved. Meanwhile, the high-activity nano zinc oxide prepared by using the preparation method is relatively high in activity, uniform in particle size, large in specific surface area and stable in property.

Description

technical field [0001] The invention relates to the technical field of nano-zinc oxide preparation, and in particular to a highly active nano-zinc oxide and a preparation method thereof. Background technique [0002] At present, highly active nano zinc oxide with a zinc oxide content of more than 95% has been widely used. However, the specific surface area of ​​most highly active nano zinc oxide is 40-50㎡ / g, and its performance is not stable. When such zinc oxide is applied to rubber production, phenomena such as difficult dispersion and agglomeration of zinc oxide are prone to occur, and the amount of zinc oxide is increased, resulting in a large amount of residual zinc in the rubber compound, which not only wastes zinc resources, but also extremely Great pollution of the environment. How to increase the specific surface area of ​​highly active nano zinc oxide has become the focus of research in the industry. Contents of the invention [0003] The purpose of the presen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G9/02
Inventor 齐磊
Owner JIYUAN LUTAI NANO MATERIAL CO LTD
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