Producing device of high-purity selenium and producing process

Abstract

High purity selenium producing apparatus and process are disclosed. The producing apparatus includes one rectifying unit coated with heat insulating layer, one temperature controlling system and one vacuum system comprising one mechanical pump and one diffusion pump. The rectifying unit with vacuum gland in the upper part is divided into one material layer and one product layer communicated mutually. The material layer includes one conical condenser, one umbrella shaped material accepter and one connecting pipe vertically distributed successively; and the product layer is provided with one product kettle connected through the connecting pipe to the material accepter. The rectifying unit in inside multilayer structure is favorable to the separation of selenium from other impurity elements, and has high yield and high product purity.

Description

technical field [0001] The invention relates to production equipment and a production process of high-purity selenium. Background technique [0002] Metal selenium and certain compounds of selenium are well-known semiconductors, have excellent physical and chemical properties, and have extensive and special uses. Selenium is in the VIA group (oxygen group) of the periodic table of elements, and the abundance of selenium in the earth's crust 9×10 -6 %, mostly exists in the form of compounds in nature, and is widely distributed in sulfide minerals, such as selenium copper ore, selenium copper silver ore, etc. High-purity selenium means that the content of selenium in selenium products is 99.999% 5N and 99.9999% 6N, that is, new products containing other impurity elements are always less than 10PPM and 1PPM (10PPM -6 PPM). [0003] In recent years, with the continuous development of photoconductive material technology, semiconductor laser technology, semiconductor refrigerat...

AI Technical Summary

Problems solved by technology

H is produced during this production process 2 Se, H 2 Se is a highly toxic substance. Once leaked, it will pollute the environment and cause harm to the human body. This production process also has the disadvantage of low production capacity

[0017] (4) Sulfite recycling method, the production process of this production process is slow, and the recovery rate is not high

[0018] Generally, the existing high-purity selenium purification process has disadvantages such as long process, complex production process, low product recovery rate, and small production capacity.

With the increasing demand for high-purity selenium in the international market, the current production technology and process of high-purity selenium are relatively lagging behind, which is far from meeting the market's demand for high-purity selenium

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