Production method of efficient zinc oxide

A zinc oxide, high-efficiency technology, applied in the direction of zinc oxide/zinc hydroxide, calcium/strontium/barium sulfate, etc., can solve the problems of not being able to produce low-zinc, high-efficiency, energy-saving and environmentally friendly zinc oxide, and avoid the production of ammonia nitrogen , Reduce production costs, strong dispersion effect

Active Publication Date: 2014-05-28
LUOYANG LANTIAN CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] Others include SUI1361109A (C01G9 / 02), CN1037740A (C22B19 / 38), which are only the traditional methods for producing zinc oxide, but cannot produce low-zinc, high-efficiency, energy-saving and environmentally friendly zinc oxide

Method used

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  • Production method of efficient zinc oxide
  • Production method of efficient zinc oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] (1) Take 700ml of water, add 58ml of sulfuric acid (93% industrial grade), stir evenly, raise the temperature to 70-80°C, start adding 90g of zinc-containing raw materials (zinc oxide%: 80%), and heat up after adding the zinc-containing raw materials 90°C, and stirred for 30 minutes, pH=5.0, zinc g / l=101, and suction filtered.

[0046] (2) Heat up the filtered zinc sulfate solution to 90°C, add 1% 5ml of potassium permanganate solution, stir for 20 minutes, and filter with suction. Manganese%=2ppm, iron%=3ppm are qualified.

[0047] (3) Add 4g of metal zinc powder to the zinc sulfate solution after suction filtration at 40°C, stir for 20 minutes after the addition is complete, and measure heavy metals < 5ppm, then suction filter.

[0048] (4) Add 40g of active agent to the purified zinc sulfate solution at a temperature of 55°C, stir for 20 minutes, add 90g of sodium carbonate, continue stirring for 30 minutes, raise the temperature to 80°C and keep it warm for 20 minu...

Embodiment 2

[0064] (1) Take 1000ml of water, add 100ml of sulfuric acid (93% industrial grade), stir evenly, raise the temperature to 80°C, start adding 190g of zinc-containing raw materials (zinc oxide%: 81%), and raise the temperature to 90°C after adding the zinc-containing raw materials , and stirred for 30 minutes, pH=4.5, zinc g / l=104.7, and suction filtered.

[0065] (2) Heat up the zinc sulfate solution after suction filtration to 90°C, add 1% 6ml of potassium permanganate solution, stir for 20 minutes, and filter with suction. Manganese%=3ppm, iron%=1ppm are qualified.

[0066] (3) Add 3.5g of metal zinc powder to the zinc sulfate solution after suction filtration at 40°C, and stir for 20 minutes after the addition is complete. The heavy metal is measured to be <5ppm, and then suction filtration.

[0067] (4) Zinc concentration in the purified zinc sulfate solution: 103.5g / l, add 58g of active agent at 40°C, stir for 20 minutes, add 130g of sodium carbonate, continue stirring fo...

Embodiment 3

[0084] (1) Take 1500ml of water, add 140ml of sulfuric acid (93% industrial grade), stir evenly, raise the temperature to 80°C, start adding 250g of zinc-containing raw materials (zinc oxide%: 82%), and raise the temperature to 90°C after adding the zinc-containing raw materials , and stirred for 30 minutes, pH=4.8, zinc g / l=105.2, and suction filtered.

[0085] (2) Heat up the zinc sulfate solution after suction filtration to 90°C, add 1% 10ml of potassium permanganate solution, stir for 20 minutes, and filter with suction. The manganese %=2ppm and iron%=3ppm are qualified.

[0086] (3) Add 3.5g of metal zinc powder to the zinc sulfate solution after suction filtration at 40°C, and stir for 20 minutes after the addition is complete. The heavy metal is measured to be <5ppm, and then suction filtration.

[0087] (4) Zinc concentration of the purified zinc sulfate solution: 110g / l, add 88g of active agent at 48°C, stir for 20 minutes, add 198g of sodium carbonate, continue stir...

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Abstract

The invention discloses a production method of efficient zinc oxide. Magnesium oxide and active silica powder are used as core components to replace partial zinc oxide, but the zinc oxide covers the core surface to form a core-shell structure, so that the production method has higher reaction interface, high activity, large specific surface area (larger than 95 m<2>/g) and low content (about 56%) of the zinc oxide. Compared with the ordinary zinc oxide methods, each ton can save 42-45% of zinc resource; the production method accords with the development requirements of environmental protection, energy conservation and emission reduction. The invention further provides a method; the method uses secondary zinc oxide (flue ash) or materials with low zinc content as main raw materials, uses a total-wet method for producing, adopts active agent (a mixture of the magnesium oxide and the active silica powder) to replace partial zinc oxide, adopts sodium carbonate (sodium carbonate) as zinc precipitator to prepare the efficient zinc oxide, and adds sodium chloride in wastewater sodium sulfate to recover by-product barium sulfate.

Description

technical field [0001] The invention belongs to the technical field of zinc oxide production, and in particular relates to a high-efficiency zinc oxide production method. Background technique [0002] Zinc oxide is a widely used and commonly used inorganic chemical raw material. Zinc oxide was discovered in 1912 as an inorganic vulcanization activator by the rubber industry. So far, it is still irreplaceable. In addition, in recent years, my country has become a pure importer of zinc resources, so saving zinc resources is an inevitable trend of future development and the only way to go. [0003] High-efficiency zinc oxide is a new nano-material with low zinc, high efficiency, energy saving and environmental protection. It is very different from traditional zinc oxide 99.7%, active zinc oxide, and nano-zinc oxide: (1) The structure is coated; The traditional zinc oxide structure is multi-ridged; the active zinc oxide structure is spherical or chain spherical, (2), the zinc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G9/02C01F11/46
Inventor 沈坤照黄利炫黄改娟沈钢沈巧芬范景云
Owner LUOYANG LANTIAN CHEM TECH
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