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Preparation and purification method of hydrogen selenide

A purification method, hydrogen selenide technology, applied in the direction of binary selenium/tellurium compounds, etc.

Inactive Publication Date: 2009-12-09
DALIAN LIFANG CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] So far, there is no published technology about the purification and filling of hydrogen selenide gas that occurs from the hydrolysis of such aluminum selenide

Method used

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  • Preparation and purification method of hydrogen selenide
  • Preparation and purification method of hydrogen selenide

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Embodiment Construction

[0013] A kind of example of the preparation purification method of hydrogen selenide of the present invention, the flow process of its process is as follows:

[0014] (Al 2 Se 3 +H 2 O)→wet H 2 Se gas → (0°C) to remove H 2 O → use Al 2 Se 3 Adsorbed H 2 O→(-50℃)H in cylinder 2 Se liquefaction → (-50°C) liquid H 2 Gently evacuate the Se cylinder → close the cylinder valve to complete the operation

[0015] control figure 2 :

[0016] newborn H 2 The Se gas 6 is passed into the saturated water vapor condenser 9, and a part of the saturated water is condensed and removed under cooling below 0°C in the ice bath 8, and then enters the adsorber 2 through the adsorber inlet 4, and the residual moisture therein is combined with the adsorbent Al 2 Se 3 Particle filler 1 contacts and reacts, H 2 The Se gas is completely dried, and the particles entrained in the gas are filtered out by the chemical fiber filter layer 3 of the adsorber, and then enter the H through the outl...

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Abstract

The preparation and purification method of hydrogen selenide is that aluminum selenide Al2Se3 reacts with water H2O to generate hydrogen selenide H2Se, and the water in the H2Se gas is removed by condensation; after continuing to adsorb residual water with aluminum selenide particles, the H2Se gas enters the steel cylinder to condense Liquefaction; the cylinder containing liquid H2Se is evacuated under a cold bath to remove non-condensable gas impurities dissolved in the liquid; the valve of the cylinder is closed to obtain purified hydrogen selenide directly contained in the cylinder; adsorption of water and reaction with water The agent can be taken out and then used as the raw material aluminum selenide Al2Se3 reacts with water H2O to generate hydrogen selenide H2Se; achieves high-efficiency dehydration effect, and becomes a product packaged in steel cylinders with a purity standard.

Description

technical field [0001] The invention relates to the preparation and purification of chemical gas hydrogen selenide, especially the preparation and purification of hydrogen selenide produced by the reaction of aluminum selenide and water, which is characterized by high water content and the key point of the purification is dehydration. Background technique [0002] Hydrogen selenide is a liquefiable, severely toxic gas that is filled in cylinders. Hydrogen selenide gas is mainly used to synthesize inorganic or organic selenium-containing compounds and prepare metal selenium. High-purity hydrogen selenide is a semiconductor dopant gas and a precursor of copper indium selenide solar cells. [0003] There are several methods for preparing hydrogen selenide, such as: ①, hydrogen selenide can be directly synthesized by hydrogen and elemental selenium above 350 ° C; ②, metal selenide and water or dilute acid; ③, selenium in the presence of triethylamine Reacts with carbon monoxid...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B19/04
Inventor 王同文
Owner DALIAN LIFANG CHEM TECH