Hydrogen selenide preparation device and method

A preparation device, hydrogen selenide technology, applied in the direction of binary selenium/tellurium compounds, etc., can solve the problems of low reaction efficiency, low reaction efficiency, and affecting the stability of the reaction process, and achieve the effect of increasing the reaction temperature and reaction rate

CN102674268AInactive Publication Date: 2012-09-19DALIAN LIFANG CHEM TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2012-09-19
Estimated Expiration
Not applicable · inactive patent

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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.
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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...

Examples

Embodiment 1

[0049] [Example 1] A kind of process of hydrogen selenide preparation device and method of the present invention, with figure 1 As an example to specify:

[0050] A hydrogen selenide preparation device and method is a preparation device and method for directly synthesizing hydrogen selenide from hydrogen and selenium, comprising a selenium liquefaction vaporizer, a synthesis reactor, a selenium condensation separator and a hydrogen selenide condensation separator. The selenium liquefaction vaporizer 5 is connected with a hydrogen gas inlet pipeline 26, and the outlet of the selenium liquefaction vaporizer is directly connected with the inlet of the synthesis reactor. The synthesis reactor is in the form of a packed tower reactor 8, and the filler 9 is stacked in the packed tower 8 to form a packed bed. , the outlet of the packed tower synthesis reactor is also directly connected with the entrance of the selenium condensation separator 10, and the selenium condensate reflux por...

Embodiment 2

[0077] A kind of technological process of hydrogen selenide preparation device and method of the present invention, with figure 2 As an example to specify:

[0078] A hydrogen selenide preparation device for directly synthesizing hydrogen selenide from hydrogen and selenium, comprising a selenium liquefaction vaporizer 5 , a synthesis reactor 8 , a selenium condensation separator 10 and a hydrogen selenide condensation separator 18 . The selenium liquefaction vaporizer is connected with a hydrogen gas intake pipeline 25, and the hydrogen gas intake pipeline is attached with an external heater 33. The selenium liquefaction vaporizer is used as an initial synthesis reactor for hydrogen and selenium to synthesize hydrogen selenide, and the selenium liquefaction vaporizer 5 is connected to the synthesis reactor 8 , the synthesis reactor is in the form of a packed tower reactor, which contains a packed bed 9, the outlet of the selenium liquefaction vaporizer is directly connected ...

Embodiment 3

[0086] A hydrogen selenide preparation device and method for directly synthesizing hydrogen selenide from hydrogen and selenium, with image 3 Take as an example to specify.

[0087] It contains a selenium liquefaction vaporizer 5 , a synthesis reactor 8 , a selenium condensation separator 11 and a hydrogen selenide condensation separator 18 , and the selenium liquefaction vaporizer is connected with a hydrogen inlet pipeline 26 . The outlet of the selenium liquefaction vaporizer 5 is connected with the inlet of the synthesis reactor 8 through the pipeline 34, the synthesis reactor is a packed tower reactor, and the outlet of the packed tower synthesis reactor 8 is directly connected with the inlet of the selenium condensation separator 10. One outlet of the selenium condensation separator 10 is located at the lower end of the selenium condensation separator, and this outlet is the return channel 31 of the selenium condensate, and the pipeline 31 is communicated with the selen...