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Preparation and purification method of hydrogen selenide

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

Inactive Publication Date: 2007-09-26
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] Compare 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 outlet ...

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Abstract

The invention discloses a purifying method to prepare hydrogen selenide, which comprises the following steps: reacting Al2Se3 and H2O; getting hydrogen selenide H2Se; removing water of H2Se gas through condensing; using Al2Se3 particle to adsorb remain water; entering into carboy to condense and liquefy; evacuating the carboy under the condition of cool bath; eliminating non-condensable gas impurity of solution in the liquid; closing the valve of carboy; getting purify hydrogen selenide; absorbing water; taking-up active solid of reacting with water as raw material; reacting Al2Se3 and H20; getting H2Se; reaching highly effective dewater effect.

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 Applications(China)
IPC IPC(8): C01B19/04
Inventor 王同文
Owner DALIAN LIFANG CHEM TECH
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