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Method for preparing high-efficiency zinc oxide complex by using ammonia-ammonium method

A technology of zinc oxide and composites, which is applied in the fields of producing energy-saving, environmentally friendly, high-efficiency zinc oxide, and low-zinc. It can solve the problems of waste of zinc resources and high zinc oxide content, and achieve thermal energy saving, large specific surface area, and strong dispersion. Effect

Active Publication Date: 2014-03-26
LUOYANG LANTIAN CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The invention provides a method for preparing a high-efficiency zinc oxide complex, which forms a zinc oxide complex by adding calcium carbonate and magnesium oxide in the pyrolysis step, and solves the problem of high zinc oxide content in patent CN95111447.6, which causes waste of zinc resources. problems, reduce production costs, save zinc resources, and meet the development needs of energy saving, low consumption, and environmental protection

Method used

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  • Method for preparing high-efficiency zinc oxide complex by using ammonia-ammonium method
  • Method for preparing high-efficiency zinc oxide complex by using ammonia-ammonium method
  • Method for preparing high-efficiency zinc oxide complex by using ammonia-ammonium method

Examples

Experimental program
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Effect test

Embodiment 1

[0057] 1. Leaching:

[0058] Take 500ml of tap water, slowly add ammonia water to adjust the ammonia concentration to 100-120 titers, add ammonium bicarbonate to a degree of carbonization of 40-45, stir the aqueous solution evenly, then add 100g of secondary zinc oxide (ZnO: 80%) to stir and leach for 2 After ~3 hours, a zinc-ammonia complex solution was formed, and then a suction filtration was performed. The leaching residue is subjected to secondary leaching.

[0059] 2. Filter once:

[0060] After the leaching reaction is finished, filter, for example, use a plate and frame filter press to obtain a transparent filtered clear liquid.

[0061] 3. Cleaning:

[0062] Transfer the clear solution after suction filtration into a 1000ml beaker, heat to 95°C, add 3g of 200-mesh metal zinc powder under stirring, and continue stirring for 30 minutes to test for heavy metal lead %: 0.0006; copper %: 0.0002; cadmium %: 0.0003; reached the requirements of the process, and then th...

Embodiment 2

[0083] 1. Leaching:

[0084] Take 1000ml of tap water, slowly add ammonia water to adjust the ammonia concentration to 100-120 titers, add ammonium bicarbonate to a degree of carbonization of 40-45, stir the aqueous solution evenly, then add 190g of secondary zinc oxide (ZnO:82%) to stir and leach for 2 After ~3 hours, a zinc-ammonia complex solution was formed, and then a suction filtration was performed. The leaching residue is subjected to secondary leaching.

[0085] 2. Filter once:

[0086] After the leaching reaction is finished, filter, for example, use a plate and frame filter press to obtain a transparent filtered clear liquid.

[0087] 3. Cleaning:

[0088] Transfer the clear solution after suction filtration into a 2000ml beaker, heat to 95°C, add 5g of 200-mesh metal zinc powder under stirring, continue stirring for 30 minutes, and carry out inspection of heavy metal lead %: 0.0006; copper %: 0.0001; cadmium %: 0.0005; reached the requirements of the process...

Embodiment 3

[0109] 1. Leaching:

[0110] Take 800ml of tap water, slowly add ammonia water to adjust the ammonia concentration to 100-120 titers, add ammonium bicarbonate to a degree of carbonization of 40-45, stir the aqueous solution evenly, then add 110g of secondary zinc oxide (ZnO:80%) to stir and leach for 2 After ~3 hours, a zinc-ammonia complex solution was formed, and then a suction filtration was performed. The leaching residue is subjected to secondary leaching.

[0111] 2. Filter once:

[0112] After the leaching reaction is finished, filter to obtain a transparent filtrated liquid.

[0113] 3. Cleaning:

[0114] Transfer the clear solution after suction filtration into a 1000ml beaker, heat to 95°C, add 3.1g of 200-mesh metal zinc powder under stirring, and continue stirring for 30 minutes to test for heavy metal lead %: 0.0006; copper %: 0.0002; cadmium % : 0.0004; reached the requirements of the process, and then secondary suction filtration, can carry out the next p...

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Abstract

The invention discloses a method for preparing high-efficiency zinc oxide complex by using an ammonia-ammonium method. The method comprises the following steps: (1) leaching; (2) primary filtering; (3) impurity removal; (4) secondary filtering; (5) pyrolysis; (6) drying and calcinating. The method is characterized in that in pyrolysis of the step (5), calcium carbonate and magnesium oxide are added when ammonia still process is carried out, so that the coated basic zinc carbonate can be formed by the zinc-ammonia complex. According to the method, in the zinc oxide production process, calcium carbonate and magnesium oxide are added in the pyrolysis step to replace the core of high-content zinc oxide, the content of zinc oxide can be reduced, the activity of zinc oxide can be improved, zinc oxide with a content of 60% can have a physical property of 99.7% ordinary zinc oxide, so that not only can the production cost be lowered, but also the quality of the product can be improved.

Description

Technical field [0001] The present invention involves a preparation method of high -efficiency zinc oxide complex.Specifically, it is a method that uses ammonia-ammonium-ammonia-based system to use ammonia-ammonia-to-energy system. Background technique [0002] Wet production of active zinc oxide is an important way to reuse the reuse of waste zinc resources. Its products have high surface activity and larger surface area. They have special performance that ordinary zinc oxideThere are extensive application prospects in industries such as chemical fiber. [0003] The existing method of preparing zinc oxide is mostly sulfate and ammonia-ammonium.Among them, sulfuric acid method uses sulfuric acid as an immersion agent and a zinc oxide reaction to generate zinc sulfate, purify the impurities, use ammonium bicarbonate or pure alkali as a precipitant to form alkaline zinc carbonate, and washed and baked zinc oxide.For example, the patented CN93103869 This process route is complicated...

Claims

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Application Information

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IPC IPC(8): C01G9/02B82Y40/00
Inventor 沈坤照黄利炫黄改娟沈钢沈巧芬
Owner LUOYANG LANTIAN CHEM TECH
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