Industrialized producing method for high-purity arsenic

Abstract

The industrialized production method for preparing simple substance and high purity arsenic disclosed by the present invention relates to a method for industrialized arsenic production, in particular to a high purity (the purity is above 99.9999 percent) continuous industrialized production method. The concrete method is realized by: first, using industrial arsenic with the purity of 99 percent the raw material, to be sublimated; second, performing chlorination reaction and synthetizing AsCl 3 ; third, distilling; fourth, dechlorinating; fifth, performing fractional dictillation through a first tower, a second tower, and a third tower; sixth, performing hydrogen reduction to obtain the end product, and packing in a non-oxygen condition. The present invention has the advantages that the vacuum sublimation is adopted, the purity of the raw material can reach 99.99 percent from 99 percent of the industrial arsenic through once sublimation, and the production capacity can be improved; the dechlorinating and the distilling processes of the present invention can eliminate various impurities with only one step, can reduce the waste material, and improve the yield rate. The other remarkable advantage of the present invention is continuous production, thereby overcoming the severe abuses of heavy pollution, unstable quality, etc.

Description

technical field [0001] The invention relates to a method for industrialized production of arsenic, in particular to a continuous industrialized production method for high-purity arsenic (with a purity of more than 6 nines). Background technique [0002] High-purity semiconductor material (6 N, 7N above 5N) arsenic is mainly used to prepare chips, LEDs (light-emitting diodes), solar cells, and devices made with it, which have large capacity, fast speed, low power consumption, anti-vibration, and anti-aging , anti-radiation, long life and other characteristics, widely used in aerospace, satellite, windows, remote control, integrated circuits, computers, military and other fields, has a broad market prospect. [0003] For a long time, high-purity arsenic (7N is 7 nines, 99.99999%) can only be produced by a few countries such as the United States, Japan, Germany, Britain, and Russia. Although China has a history of nearly 30 years, it is only at the laboratory scale At present,...

AI Technical Summary

Problems solved by technology

The United States has an annual output of 30 tons, rectification method, and fourteen processes (the United States has stopped production since 2005), which is characterized by long process, heavy pollution, and high cost. Five processes, but because it is an intermittent production process, its output is low (hundreds of kilograms a year), pollution is high, and the cost is high

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