Hydrogen selenide preparation device and method

Abstract

Disclosed are a hydrogen selenide preparation device and a method. According to the method, the hydrogen selenide is directly synthesized by hydrogen and selenium(Se), a hydrogen inlet pipeline (26) is fed into a selenium liquefaction and vaporization device (5), a primary synthetic reaction between the hydrogen and the selenium is started, synthesized an H2Se / Se / H2 mixing gas-liquid stream is fed into a filling tower-type synthesis reactor (8) and subjected to a continuous synthetic reaction, the Se in a selenium condensation separator (10) is condensed into liquid, then is separated and flows back to the synthesis reactor or the selenium liquefaction and vaporization device for continuing reacting, an H2Se / H2 mixing gas stream flows into a hydrogen selenide condensation separator (18), non-condensable gas hydrogen in the hydrogen selenide condensation separator is separated and conveyed back to the hydrogen inlet pipeline (26), the non-condensable gas hydrogen and the hydrogen are combined for supplying hydrogen, and finally, the H2Se is condensed and collected in the hydrogen selenide condensation separator.

Description

【Technical field】 [0001] The invention belongs to the technical field of special gas synthesis in fine chemical industry, and specifically relates to the preparation technology of hydrogen selenide, an electron gas used in semiconductors, in particular to a device and a process method for directly reacting selenium and hydrogen to form hydrogen selenide. 【Background technique】 [0002] hydrogen selenide H 2 Se is a liquefiable toxic chemical gas with a boiling point of -42°C and a melting point of -66°C. It is the precursor material for preparing infrared detector PbSe, high-power laser window ZnSe and thin film solar cell CIGS. Therefore, hydrogen selenide is an important electron gas. [0003] There are several preparation methods of hydrogen selenide, and there are two main preparation methods. One of them is the reaction of aluminum selenide with water to generate hydrogen selenide and aluminum hydroxide. The other is to directly synthesize hydrogen selenide by react...

AI Technical Summary

Problems solved by technology

[0010] GB1508749 and JP-A-2007-246342 are basically limited to principled technical inventions, ignoring industrial process methods and equipment configurations. As a result, the two patents adopt a kettle-type bubbling reaction method, which has low reaction efficiency and unreacted free ions with resource value h 2 unused

[0011] The problem of low reaction efficiency of the tank type bubbling reaction mode is: H 2 The effective reaction zone between gas-Se liquid vapor is limited to H 2 The gas-Se liquid-vapor contact bubbling interval lacks the support for the reactants to mix and collide with each other to continue the reaction. The updraft in the reactor entrains a large number of Se droplets, which not only fail to act as reactants, but cause pulsation in the working system Shock, affecting the stability of the reaction process

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