A kind of preparation method and preparation system of high-purity nano-selenium powder

A nano-selenium powder, high-purity technology, applied in the field of high-purity nano-selenium powder preparation method and its preparation system, can solve the problems of inability to meet the basic needs of human beings, low efficiency of plant active selenium, etc., and achieve suitable for popularization of production and application, preparation Fast, environmentally friendly results

Active Publication Date: 2022-01-28
黄湛明 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the efficiency of synthesizing plant active selenium by photosynthesis of plants is low, which cannot meet the basic needs of human beings.

Method used

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  • A kind of preparation method and preparation system of high-purity nano-selenium powder

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Embodiment 1

[0030] The preparation method of the high-purity nano-selenium powder described in the present embodiment comprises the steps:

[0031] 1) The crude selenium raw material and high-purity oxygen react under the condition of microwave heating to form selenium oxide, and the selenium oxide is sublimated. This step is carried out in a fluidized bed, and the temperature in the fluidized bed is maintained at 550 ° C by microwave heating. High-purity oxygen The purity is greater than 99.99%, and the rate at which high-purity oxygen is passed into the fluidized bed is 300ml / s.

[0032] 2) The sublimated selenium oxide is combined with high-purity atomized water, and then undergoes a reduction reaction with an atomized reducing agent to obtain nano-scale selenium particles; the atomized water is produced by the first atomization device, and the impurities in the high-purity atomized water The content is less than 0.1mg / L, the conductivity is less than 0.1μs / cm, the atomized reducing ag...

Embodiment 2

[0035] The preparation method of the high-purity nano-selenium powder described in the present embodiment comprises the steps:

[0036] 1) The crude selenium raw material and high-purity oxygen react under the condition of microwave heating to generate selenium oxide, and the selenium oxide is sublimated. This step is carried out in a fluidized bed, and the temperature in the fluidized bed is maintained at 520-580 ° C by microwave heating. The purity of the pure oxygen is greater than 99.99%, and the rate of passing the high-purity oxygen into the fluidized bed is 30-500ml / s.

[0037] 2) The sublimated selenium oxide is combined with high-purity atomized water, and then undergoes a reduction reaction with an atomized reducing agent to obtain nano-scale selenium particles; wherein the high-purity atomized water is produced through the first atomization device, and the high-purity atomized water The water impurity content is less than 0.1mg / L, the conductivity is less than 0.1μs...

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Abstract

A method for preparing high-purity nano-selenium powder, comprising the following steps: 1) reacting crude selenium raw material and high-purity oxygen under the condition of microwave heating to generate selenium oxide, and the selenium oxide is sublimated; 2) sublimated selenium oxide and atomized water 3) After the reduction reaction is completed, it is passed into high-purity water and mixed to obtain a slurry, and the slurry is dried to obtain nano-selenium powder. The invention can prepare high-purity nano red selenium powder or nano gray selenium powder, the preparation method is simple and convenient to operate, the effective utilization rate of resources is high, and the production cost is low. Oxygen can be recycled, has little impact on the environment, and is suitable for popularization of production and application.

Description

technical field [0001] The invention relates to the technical field of production and preparation of selenium powder, in particular to a method for preparing high-purity nano-selenium powder and a preparation system thereof. Background technique [0002] Selenium is an important non-metallic element. In addition to being used as a photosensitive material and electrolytic manganese catalyst, it is also an essential nutrient element for humans and animals. The existence of selenium in nature is divided into two types: inorganic selenium and plant active selenium. Inorganic selenium generally refers to sodium selenite and sodium selenate, which are obtained from the by-products of metal mineral deposits; plant active selenium is formed by combining biotransformation with amino acids , generally exists in the form of selenomethionine. Plant active selenium is a selenium source that is allowed to be used by humans and animals. Practice has proved that plant active selenium has a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B19/02B82Y40/00
CPCC01B19/02B82Y40/00
Inventor 黄湛明鲍瑞
Owner 黄湛明
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