A kind of preparation method of hydrogen selenide

A technology of hydrogen selenide and hydrogen, applied in the direction of binary selenium/tellurium compounds, etc., can solve the problems of frozen blockage at the outlet of the transfer pipe, interruption of the product transfer process, high energy consumption, etc., and achieve the effect of reducing energy consumption and avoiding freezing blockage

Active Publication Date: 2011-12-07
中昊光明化工研究设计院有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

The energy consumption of this process route is very high, and when the hydrogen selenide product is transferred between various cryogenic refrigeration containers, it is easy to cause th

Method used

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  • A kind of preparation method of hydrogen selenide
  • A kind of preparation method of hydrogen selenide

Examples

Experimental program
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Effect test

example 1

[0036] 1) Add 10 kilograms of selenium particles into the reactor, seal the system, and use helium to carry out air tightness test.

[0037] 2) After passing the airtight test, vacuumize the reactor to ≤6×10 -2 1 hour below Pa.

[0038] 3) After the vacuuming is completed, the reactor is heated to 350° C., and the temperature is kept constant at 350° C. until the reaction is completed.

[0039] 4) Pass hydrogen into the reactor at a flow rate of 5 L / min, and the reaction starts until the liquid level of selenium shown by the radioactive liquid level meter returns to zero, and the reaction ends.

[0040] 5) The hydrogen selenide gas produced by the reaction and the unreacted hydrogen gas mixture pass through the room temperature circulating water heat exchanger and the -40~-60°C low temperature condenser in sequence.

[0041] 6) The hydrogen selenide liquid condensed at low temperature flows into the product collector, the hydrogen tail gas enters the tail gas absorption towe...

example 2

[0044] 1) Add 15 kg of selenium particles into the reactor 2, seal the system, and use helium to carry out air tightness test.

[0045] 2) After passing the airtight test, vacuumize the reactor 2 to ≤6×10 -2 1 hour below Pa.

[0046] 3) After the vacuuming is completed, the reactor 2 is heated to 350° C., and the temperature is kept constant at 350° C. until the reaction is completed.

[0047] 4) Pass hydrogen into the reactor 2 at a flow rate of 7 L / min, and the reaction starts until the liquid level of selenium shown by the radioactive liquid level gauge returns to zero, and the reaction ends.

[0048] 5) The hydrogen selenide gas produced by the reaction and the unreacted hydrogen gas mixture pass through the room temperature circulating water heat exchanger 3 and the -40~-60°C low temperature condenser 4 in sequence.

[0049] 6) The hydrogen selenide liquid condensed at low temperature flows into the product collector 5, and the hydrogen tail gas enters the tail gas abso...

example 3

[0052] 1) Add 30 kg of selenium particles into the reactor 2, seal the system, and use helium to carry out air tightness test.

[0053] 2) After passing the airtight test, vacuumize the reactor to ≤6×10 -2 1 hour below Pa.

[0054] 3) After the vacuuming is completed, the reactor 2 is heated to 500° C., and the temperature is kept constant at 500° C. until the reaction is completed.

[0055]4) Pass hydrogen into the reactor 2 at a flow rate of 9 L / min, and the reaction starts until the liquid level of selenium shown by the radioactive liquid level meter returns to zero, and the reaction ends.

[0056] 5) The hydrogen selenide gas produced by the reaction and the unreacted hydrogen gas mixture pass through the room temperature circulating water heat exchanger 3 and the -40~-60°C low temperature condenser 4 in sequence.

[0057] 6) The hydrogen selenide liquid condensed at low temperature flows into the product collector 5, and the hydrogen tail gas enters the tail gas absorpt...

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Abstract

The invention discloses a preparation method of a hydrogen selenide. Selenium and hydrogen are used as reaction raw materials, a hydrogen selenide product is directly produced in a liquid product discharging mode, other impurities are basically not introduced in the reaction process, the reaction product is subjected to gas-liquid separation, the solubility of the hydrogen in low-temperature hydrogen selenide liquid is low, and a hydrogen selenide product with purity of not less than 99.99 percent can be directly produced. In addition, because the liquid product is directly discharged, the re-crystallization process can be cancelled, the temperature of refrigerant only needs to reach 40 DEG C below zero to 60 DEG C below zero, and energy consumption is reduced. Because the condensation temperature is higher than the freezing point (66 DEG C below zero) of the hydrogen selenide, frozen blockage risk of a pipeline product is avoided.

Description

technical field [0001] The invention belongs to the technical field of chemical production, and in particular relates to a method for preparing hydrogen selenide gas. Background technique [0002] Hydrogen selenide is mainly used in the synthesis of selenium-containing compounds, such as the production of infrared photosensitive material zinc selenide or the reaction with nitrile compounds to prepare selenourea compounds. Hydrogen selenide is also used for selenium doping of semiconductor materials to change the properties of semiconductor materials. [0003] The preparation method of hydrogen selenide mainly contains: [0004] 1. Water or acid with Al 2 Se 3 The reaction produces hydrogen selenide and is accompanied by the production of aluminum hydroxide or aluminum trichloride. [0005] Al 2 Se 3 +6H 2 O=2Al(OH) 3 +3H 2 Se [0006] Al 2 Se 3 +6HCl=2AlCl 3 +3H 2 Se [0007] 2.H 2 Synthesized directly with Se. [0008] h 2 +Se=H 2 Se [0009] Chinese pat...

Claims

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Application Information

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IPC IPC(8): C01B19/04
Inventor 梁肃臣王正令夏山林高天龙徐永峰宋喜东牛永进郭友才岳成君
Owner 中昊光明化工研究设计院有限公司
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