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Method for producing disilane by reaction of magnesium silicide and ammonium chloride

A technology of disilane and ammonium chloride, applied in the direction of silicon hydride and the like, can solve the problems of high production cost, many impurity gases, long process, etc., and achieve the effects of low production cost, high economic benefit and low investment.

Inactive Publication Date: 2012-06-27
TIANJIN TAIHENG GASES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production process of this method is long, with many impurity gases and high water content, the production cost is very high, and the purity is low, which causes great difficulties for the next step of purification

Method used

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  • Method for producing disilane by reaction of magnesium silicide and ammonium chloride
  • Method for producing disilane by reaction of magnesium silicide and ammonium chloride

Examples

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Effect test

Embodiment 1

[0023] A method for producing disilane by chemical reaction of magnesium silicide and ammonium chloride in a liquid ammonia medium, characterized in that the silicide is produced by synthesizing silane at 800°C,

[0024] 2Mg 2 Si + 8NH 4 Cl Si 2 h 6 + 4MgCl 2 + 8NH 3 + H 2

[0025] Close 1#, 4# valves, open 2# and 3# valves; the mixed gas flow from the crude silane purification unit (the main component is H 2 、SiH 4 、Si 2 h 6 ...), flowing through the -110°C cold trap, disilane becomes liquid and condenses in the disilane liquefaction bottle, and silane and hydrogen continue to enter the next purification process along the pipeline; when disilane is in the liquefaction bottle After the income reaches a certain amount, close the 2# and 3# valves, open the 1# and 4# valves; ① let the silane production continue; Silane products.

Embodiment 2

[0027] A method for producing disilane by chemical reaction of magnesium silicide and ammonium chloride in a liquid ammonia medium, characterized in that the silicide is produced by synthesizing silane at 600°C,

[0028] 2Mg 2 Si + 8NH 4 Cl Si 2 h 6 + 4MgCl 2 + 8NH 3 + H 2

[0029] Close 1#, 4# valves, open 2# and 3# valves; the mixed gas flow from the crude silane purification unit (the main component is H 2 、SiH 4 、Si 2 h 6 ...), flowing through the -110°C cold trap, disilane becomes liquid and condenses in the disilane liquefaction bottle, and silane and hydrogen continue to enter the next purification process along the pipeline; when disilane is in the liquefaction bottle After the income reaches a certain amount, close the 2# and 3# valves, open the 1# and 4# valves; ① let the silane production continue; Silane products.

Embodiment 3

[0031] A method for producing disilane by chemical reaction of magnesium silicide and ammonium chloride in a liquid ammonia medium, characterized in that the silicide is produced by synthesizing silane at 900°C,

[0032] 2Mg 2 Si + 8NH 4 Cl Si 2 h 6 + 4MgCl 2 + 8NH 3 + H 2

[0033] Close 1#, 4# valves, open 2# and 3# valves; the mixed gas flow from the crude silane purification unit (the main component is H 2 、SiH4 、Si 2 h 6 ...), flowing through the -110°C cold trap, disilane becomes liquid and condenses in the disilane liquefaction bottle, and silane and hydrogen continue to enter the next purification process along the pipeline; when disilane is in the liquefaction bottle After the income reaches a certain amount, close the 2# and 3# valves, open the 1# and 4# valves; ① let the silane production continue; Silane products.

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Abstract

The invention discloses a method for producing disilane by the chemical reaction of magnesium silicide and ammonium chloride in a liquid ammonia medium. A silicide is synthesised at 600-900 DEG C and may be high-order magnesium chloride, i.e., Mg2Si2. The silicide is good for forming disilane. Once the mixed airflow of a crude silane purification device flows through a cold trap at minus 110 DEG C, the disilane is changed into liquid and condensed in a liquefaction bottle for disilane, and then the silane and hydrogen continue to enter in a working procedure of purification along a pipeline.

Description

Technical field [0001] The present invention is an organic intermediate system preparation technology field. It involves the preparation method of ethylene, and it is more specifically to use magnesium and ammonium chloride reactions to produce ethylene. Background technique [0002] The existing alkane production process mainly uses the gas chromatography method. This method has a very high output production cost, it is difficult to supply large -scale supply, and cannot meet the growing market demand. [0003] Ethylene spontaneously ignited in the air, the fire point was room temperature, it burned instantly when it encountered the air, and it was decomposed into SIH 4 H 2 EssenceThe burning concentration range is wide. At more than 0.2%, the combustion emits the flame. At 0.2%, the oxidation reaction is performed to generate white SIO 2 EssenceBurning in the chlorine gas explosion.React with halogen gas explosive, if at low temperature, it is moderately halogen.With sf 6 Conta...

Claims

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Application Information

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IPC IPC(8): C01B33/04
Inventor 原东升
Owner TIANJIN TAIHENG GASES
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