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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 low efficiency of plant active selenium, unable to meet the basic needs of human beings, etc., achieve rapid preparation, suitable for popularization of production and Simple and convenient application and operation

Active Publication Date: 2020-09-22
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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  • 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

The invention relates to a preparation method of high-purity nano-selenium powder, which comprises the following steps: 1) reacting a crude selenium raw material with high-purity oxygen under the condition of microwave heating to generate selenium oxide, and sublimating the selenium oxide; 2) combining sublimated selenium oxide with atomized water, and then performing a reduction reaction with anatomized reducing agent; and 3) after the reduction reaction is finished, introducing the product into high-purity water, mixing to obtain slurry, and drying the slurry to obtain the nano-selenium powder. The high-purity red nano selenium powder or grey nano selenium powder can be prepared, the preparation method is simple and convenient to operate, the effective utilization rate of resources is high, the production cost is low, the invention further relates to a system for preparing the nano selenium powder, high-purity oxygen in the system can be recycled, the influence on the environment issmall, and the method and the system are suitable for popularization, 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 Applications(China)
IPC IPC(8): C01B19/02B82Y40/00
CPCC01B19/02B82Y40/00
Inventor 黄湛明鲍瑞
Owner 黄湛明
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