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Film-coating production technology for nano zinc oxide

A nano-zinc oxide and production process technology, applied in the direction of zinc oxide/zinc hydroxide, nanotechnology, etc., can solve problems such as insufficient preparation methods, achieve stable nano-size and nano-material properties, mild and friendly reaction conditions, and grain development full effect

Active Publication Date: 2012-06-27
SHANOGUAN KAIHONG NANOMATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0040] In summary, nano-zinc oxide has broad application prospects, but its conventional preparation methods are insufficient at present.
At the same time, there is no process to prepare nano-zinc oxide by first planting a basic zinc carbonate film on the surface of the particle and its inner pores.

Method used

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  • Film-coating production technology for nano zinc oxide
  • Film-coating production technology for nano zinc oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] A planting film type nano-zinc oxide production process is characterized in that it comprises the following steps:

[0069] (1) Leaching: use ammonia water and ammonium bicarbonate as the leaching solvent, and the zinc in the secondary zinc oxide is leached to make a zinc ammonia complex solution;

[0070] The main reaction formula of the step is as follows:

[0071] ZnO+3NH 3 ·H 2 O+NH 4 HCO 3 =Zn(NH 3 ) 4 CO 3 +4H 2 o

[0072] The leaching is two-stage, which is carried out in two leaching tanks respectively. The filter residue after the first stage leaching is added into the second stage leaching tank under stirring and then leached, the filter residue leached in the second stage is discarded, and the second stage is leached. The secondary immersion solution from the stage leaching is added to the first stage leaching tank as a leaching solvent, and the secondary zinc oxide is put into the first leaching tank under stirring, and the leaching primary immersio...

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Abstract

The invention provides a film-coating production technology for nano zinc oxide and belongs to the technical field of fine petrochemicals and chemicals. The technological process is that an alkali carbonic acid zinc film is coated uniformly on the surfaces of light calcium carbonate and inner pores thereof, subjected to decentralized processing, and then calcined and activated in a dynamic calcination furnace at the temperature of 400 to 500 DEG C, so as to prepare the nano zinc oxide. The nano zinc oxide prepared through the technology belongs to a low-zinc product (containing 24 to 30 percent zinc), has the advantages of stable nano size, stable nano material properties, completely developed crystal grains, small particle diameter, uniformity in distribution, low reunion degree, high activity and good dispersivity, and can be widely applied to rubber, tires, catalysis, magnetism, optics, electricity, chemistry, physics, biology and the like.

Description

technical field [0001] The invention relates to a production process of petrochemical and chemical fine chemicals, in particular to a production process of film-planting nano zinc oxide. Background technique [0002] Nano zinc oxide is a new type of fine inorganic chemical product with multiple functions and high added value. Its particle size is between 1-100 nanometers, also known as ultra-fine zinc oxide. Due to the miniaturization of crystal grains, the specific surface area increases sharply, and its surface electronic structure and crystal structure change, resulting in surface effects, volume effects, quantum size effects and macroscopic tunnel effects that macroscopic objects do not have, as well as high transparency and high dispersion. Features. Research in recent years has found that it has special properties and new uses that cannot be compared with general zinc oxide products in terms of catalysis, magnetism, light, electricity, chemistry, physics, biology, an...

Claims

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Application Information

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IPC IPC(8): C01G9/02B82Y40/00
Inventor 梁鹤贤陈升刘优强黄有余
Owner SHANOGUAN KAIHONG NANOMATERIAL
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