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Preparation method of nano zinc sulfide and nano barium sulfate

A technology of nano barium sulfate and nano zinc sulfide, applied in the field of nano materials, can solve the problems of high energy consumption, high equipment requirements, zinc sulfide and barium sulfate can not reach the nano level, etc., and achieves mild reaction conditions and reduces production costs. Effect

Pending Publication Date: 2022-01-07
LANZHOU LANSHI ZHONGKE NANOTECHNOLOGY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, although there are many methods for preparing zinc sulfide and barium sulfate, the prepared zinc sulfide and barium sulfate often cannot reach the nanometer level, and there are problems of insufficient purity and low yield; and it is difficult to produce zinc sulfide in the preparation of zinc sulfide. Avoid the discharge of hydrogen sulfide gas, and other waste salt and waste water discharge; or the preparation requires harsh high-temperature calcination conditions, high equipment requirements, high energy consumption, and is not conducive to environmental protection
With the enhancement of environmental protection awareness and the deepening of the concept of green recycling, these processes cannot meet the increasingly stringent environmental protection requirements

Method used

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  • Preparation method of nano zinc sulfide and nano barium sulfate
  • Preparation method of nano zinc sulfide and nano barium sulfate
  • Preparation method of nano zinc sulfide and nano barium sulfate

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Embodiment 1

[0048] A preparation method for nano-zinc sulfide, nano-barium sulfate, comprising the following steps ( figure 1 For the preparation of nano-zinc sulfide and nano-barium sulfate process flow diagram):

[0049] (1) Weigh 600g of secondary zinc oxide with a purity of 37%, add a little water to moisten it, slowly add 550g of concentrated sulfuric acid solution dropwise for acid leaching, control the reaction pH value to about 5, and the reaction temperature to about 90°C for 30 minutes , to obtain primary zinc sulfate solution. Then add 25g 28% hydrogen peroxide, 12g zinc powder (95% zinc content) and 4g potassium permanganate (99%) successively, and the reaction temperature is controlled at about 68°C to remove iron, manganese and cadmium in the primary zinc sulfate solution , copper, lead, nickel and other impurities to obtain zinc sulfate solution, the concentration of which is controlled at 1.0-1.5mol / L.

[0050] (2) Dilute the zinc sulfate solution after purification, be ...

Embodiment 2

[0054] A preparation method for nano-zinc sulfide and nano-barium sulfate, comprising the following steps:

[0055] (1) Weigh 600g of secondary zinc oxide with a purity of 55%, add a little water to moisten it, slowly add 550g of concentrated sulfuric acid solution dropwise for acid leaching, control the reaction pH value to about 5, and the reaction temperature to about 90°C for 30 minutes , to obtain primary zinc sulfate solution. Then add 25g 28% hydrogen peroxide, 15g zinc powder (95% zinc content) and 5g potassium permanganate (99%) successively, and the reaction temperature is controlled at about 75°C to remove iron, manganese and cadmium in the primary zinc sulfate solution , copper, lead, nickel and other impurities to obtain zinc sulfate solution, the concentration of which is controlled at 1.2-1.8mol / L.

[0056] (2) Dilute the zinc sulfate solution after purification, be mixed with the zinc sulfate solution A that concentration is 1.0mol / L, industrial sodium carbona...

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Abstract

The invention belongs to the technical field of nano materials, and discloses a preparation method of nano zinc sulfide and nano barium sulfate. The preparation method comprises a step of preparing zinc carbonate precipitate in a bubble liquid membrane reaction device, a step of preparing nano barium sulfate, and a step of preparing nano zinc sulfide and a soluble carbonate solution, wherein the soluble carbonate can be recycled. According to the invention, the bubble liquid membrane reaction device is fully utilized, a nanoscale product can be generated, and the reaction condition is mild; by designing the preparation process and utilizing the principle that the barium sulfide solution is strongly alkaline and the zinc carbonate precipitate can be dissolved in strong alkali, the production cost can be reduced by recycling carbonate without generating waste salt and waste water while the nanocrystallization manufacturing of the barium sulfate and the zinc sulfide is realized. The purity of the prepared nano zinc sulfide is greater than 99%, and the yield is greater than 90%; and the purity of the nano barium sulfate is greater than 95%, and the yield is greater than 90%.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, and in particular relates to a preparation method of nanometer zinc sulfide and nanometer barium sulfate. Background technique [0002] Zinc sulfide is an important II-VI compound semiconductor with a band gap of 3.5eV at room temperature and a direct transition energy band structure. It is widely used in electronic vacuum coating, X-ray fluorescent screen, plastic, rubber, pigment, paint, medicine and other fields. Has a wide range of applications. When the size of ZnS is reduced to the nanoscale, nano-ZnS will show unique physical and chemical properties, and it has excellent performance in the fields of electricity, optics, mechanics and catalysis. [0003] Nano-barium sulfate has small size effect and good chemical stability, and is widely used in coatings, plastics, filling materials and additives for paints and other fields. [0004] In the prior art, although there are many m...

Claims

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Application Information

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IPC IPC(8): C01G9/08C01F11/46B82Y30/00
CPCC01G9/08C01F11/462B82Y30/00C01P2004/03C01P2004/04C01P2004/64C01P2004/62C01P2006/80
Inventor 曾能侯晓刚施本义雍红团华徐艳崔海峰王卫军施辉谢小明
Owner LANZHOU LANSHI ZHONGKE NANOTECHNOLOGY CO LTD