Process for producing silicane

A production process and silane technology, applied in the direction of silicon hydride, etc., can solve the problem of low silane conversion rate and achieve the effect of improving the conversion rate

Active Publication Date: 2009-09-16
YINGLI ENERGY CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] Silane conversion is not high when using one reactor

Method used

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  • Process for producing silicane
  • Process for producing silicane
  • Process for producing silicane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In the SAH raw material tank, SAH is diluted with DME to adjust the concentration to 7%, and the SAH flow rate is set to 77kg / min (kg / min). After cooling and dilution, SAH first enters the silane scrubber, and then enters the first reactor. React with the unreacted STF from the second reactor, the reaction product is divided into two parts, the first part is about 90-95% of the SAH flow, and returns to the first reactor through a filter and water cooler, To adjust the temperature of the reactor; the second part enters the second reactor to react with the raw material STF. The reaction conditions in the first reactor are that the temperature is 30-40° C. and the pressure is 0.03-0.06 MPa (megapascal). The reaction conditions in the second reactor are that the temperature is 45-55° C., and the pressure is 0.1-0.4 MPa. The flow rate of the raw material STF is 100 mol / min (mol / min). Both the first reactor and the second reactor are equipped with stirrers, and the stirring...

Embodiment 2

[0036] In the SAH raw material tank, SAH is diluted with DME to adjust the concentration to 10%, and the SAH flow rate is set to 54kg / min (kg / min). After cooling and dilution, SAH first enters the silane scrubber, and then enters the first reactor. React with the unreacted STF from the second reactor, the reaction product is divided into two parts, the first part is about 90-95% of the SAH flow, and returns to the first reactor through a filter and water cooler, To adjust the temperature of the reactor; the second part enters the second reactor to react with the raw material STF. The reaction conditions in the first reactor are that the temperature is 30-40° C. and the pressure is 0.06-0.08 MPa (megapascal). The reaction conditions in the second reactor are that the temperature is 45-55° C., and the pressure is 0.1-0.4 MPa. The flow rate of the raw material STF is 100 mol / min (mol / min). Both the first reactor and the second reactor are equipped with stirrers, and the stirrin...

Embodiment 3

[0043] In the SAH raw material tank, SAH is diluted with DME to adjust the concentration to 10%, and the SAH flow rate is set to 54kg / min (kg / min). After cooling and dilution, SAH first enters the silane washing tower, and then enters the first reactor. React with the unreacted STF from the second reactor, the reaction product is divided into two parts, the first part is about 90-95% of the SAH flow, and returns to the first reactor through a filter and water cooler, To adjust the temperature of the reactor; the second part enters the second reactor to react with the raw material STF. The reaction conditions in the first reactor are that the temperature is 30-40° C. and the pressure is 0.03-0.06 MPa (megapascal). The reaction conditions in the second reactor are that the temperature is 45-55° C., and the pressure is 0.1-0.4 MPa. The flow rate of the raw material STF is 100 mol / min (mol / min). Both the first reactor and the second reactor are equipped with stirrers, and the st...

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Abstract

The invention discloses a process for preparing silicane, sodium aluminum hydride solution is passed through a first reactor and a second reactor in order, silicon tetrafluoride gas is passed through the second reactor and the first reactor in order, and the sodium aluminum hydride solution is diethylene glycol dimethyl ether solution of sodium aluminum hydride. The process for preparing silicane provided by the present invention utilizes the direct reaction of the odium aluminum hydride solution and the silicon tetrafluoride to generate silicane, The sodium aluminum hydride solution and the silicon tetrafluoride gas are conversely feeding mutually, in the first reactor, amount of the sodium aluminum hydride is larger than that of the silicon tetrafluoride, so that silicon tetrafluoride can be completely reacted, in the second reactor, amount of the silicon tetrafluoride is larger than that of the sodium aluminum hydride, so that the sodium aluminum hydride can be completely reacted, thereby increasing conversion of the silicane. The process for preparing silicane provided by the present invention is especially suitable for silicane industrialization production.

Description

technical field [0001] The invention relates to a silane production process, in particular to a process for producing silane by reacting silicon tetrafluoride and sodium aluminum hydride, and belongs to the field of silane production. Background technique [0002] The structural formula of silane is SiH 4 , also known as monosilane. Silane is a very useful chemical substance that can be used as a raw material for the production of silicon. Currently in China, there is no manufacturer capable of industrially producing silane, and industrial users in my country mainly import it from abroad. REC Group of the United States is the world's largest supplier of silane, occupying more than 80% of the world's market share. The REC Group company in the United States may use the reaction of lithium hydride and silicon tetrachloride to produce silane. This method of preparing silanes mainly includes three steps. The first step is the electrolysis of chlorite to prepare lithium metal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B33/04
Inventor 张月和薛明李青娟蔡春立王伟
Owner YINGLI ENERGY CHINA
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