A hydrogen selenide preparing method

Abstract

The invention relates to a hydrogen selenide preparing method. The method includes S1) adding a sulfur-containing selenium raw material into a reaction furnace; S2) feeding heated hydrogen into the reaction furnace; S3) generating hydrogen selenide by reacting selenium and the hydrogen under heated conditions in the reaction furnace, and mixing the hydrogen selenide into a mixed gas; S4) cooling the mixed gas discharged from the reaction furnace and performing separation to obtain selenium vapor; S5) condensing and liquefying the cooled mixed gas in a condenser; S6) when 5-15% of the selenium raw material is consumed, filling a container with the liquified hydrogen selenide for collection; S7) allowing the reaction to be continued, and filling a container with the liquified hydrogen selenide for collection when 40-60% of the selenium raw material is consumed; S8) allowing the reaction to be continued, and filling a container with the liquified hydrogen selenide for collection when 85-95% of the selenium raw material is consumed; and S9) repeating the S2) step to the S8) step. According to the method, hydrogen selenide products having different hydrogen sulfide contents are obtained through staged collection manners, thus meeting different demands of different customers.

Description

technical field [0001] The invention relates to the field of preparation of hydrogen selenide, in particular to a preparation method of hydrogen selenide. Background technique [0002] Hydrogen selenide is an important raw material for making infrared material zinc selenide lenses and other metal selenides, and it is also a raw material for epitaxy, ion implantation and doping in the production of solar cells, semiconductors and integrated circuits. In the process of directly combining selenium and hydrogen as raw materials to generate hydrogen selenide, because the impurity sulfur in selenium will also react with hydrogen to generate hydrogen sulfide, which is mixed in hydrogen selenide and is difficult to remove. Therefore, sulfur becomes hydrogen selenide Impurities that are difficult to remove. In the prior art, the method of removing impurity sulfur in advance is generally used to solve the above problems. However, the procedure is relatively complicated, and other pro...

AI Technical Summary

Problems solved by technology

In the prior art, the method of removing impurity sulfur in advance is generally used to solve the above problems. However, the procedure is more complicated, and other problems (such as blockage) are easily introduced, and the impurity sulfur cannot be completely removed, and the cost is extremely high.

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