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Preparation method of sulfur hexafluoride

A technology of sulfur hexafluoride and hydrogen fluoride, which is applied in the direction of sulfur and halogen compounds, and can solve the problems of not being able to obtain sulfur hexafluoride

Inactive Publication Date: 2012-03-07
TIANJIN TAIYUAN INDAL GAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The problem to be solved by the present invention is to overcome the deficiencies of the prior art. The prior art cannot obtain pure sulfur hexafluoride. The production efficiency will be greatly improved by adopting this method. This method provides a kind of equipment and process

Method used

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  • Preparation method of sulfur hexafluoride

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] First prepare by reacting the complex of nitrosyl fluoride and hydrogen fluoride with chlorine gas and sulfur dichloride, and finally use pyrolysis of sulfur pentafluoride to produce sulfur hexafluoride. The reaction formula is as follows: The reaction formula is as follows:

[0020] SCl 2 +5NOF+2Cl 2 →SF 5 Cl+5NOCl

[0021] SF 4 +Cl 2 +NOF→SF 5 Cl+NOCl

[0022] 2SF 5 Cl→SF 6 +SF 4 +Cl 2

[0023] Wherein the weight fraction ratio of nitrosyl fluoride: hydrogen fluoride complex: chlorine gas: sulfur dichloride is 1:1:2:1. See the process for details figure 1 .

Embodiment 2

[0025] First prepare by reacting the complex of nitrosyl fluoride and hydrogen fluoride with chlorine gas and sulfur dichloride, and finally use pyrolysis of sulfur pentafluoride to produce sulfur hexafluoride. The reaction formula is as follows: The reaction formula is as follows:

[0026] SCl 2 +5NOF+2Cl 2 →SF 5 Cl+5NOCl

[0027] SF 4 +Cl 2 +NOF→SF 5 Cl+NOCl

[0028] 2SF 5 Cl→SF 6 +SF 4 +Cl 2

[0029] Wherein the weight fraction ratio of nitrosyl fluoride: hydrogen fluoride complex: chlorine gas: sulfur dichloride is 1:1:4:1. See the process for details figure 1 .

Embodiment 3

[0031] First prepare by reacting the complex of nitrosyl fluoride and hydrogen fluoride with chlorine gas and sulfur dichloride, and finally use pyrolysis of sulfur pentafluoride to produce sulfur hexafluoride. The reaction formula is as follows: The reaction formula is as follows:

[0032] SCl 2 +5NOF+2Cl 2 →SF 5 Cl+5NOCl

[0033] SF 4 +Cl 2 +NOF→SF 5 Cl+NOCl

[0034] 2SF 5 Cl→SF 6 +SF 4 +Cl 2

[0035] Wherein the weight fraction ratio of nitrosyl fluoride: hydrogen fluoride complex: chlorine gas: sulfur dichloride is 1:1:4:2. See the process for details figure 1 .

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Abstract

The invention discloses a technology for producing sulfur hexafluoride by reacting nitrosyl fluoride with chlorine and sulfur dichloride. The technology comprises the following steps: firstly, reacting a complex of nitrosyl fluoride and hydrogen fluoride with chlorine and sulfur dichloride to prepare sulfur chloride pentafluoride; and finally, carrying out high-temperature decomposition on sulfur chloride pentafluoride so as to produce sulfur hexafluoride. According to the invention, because a single substance fluorine is not directly used as a raw material, the technology disclosed by the invention has a value in the aspect of developing and utilizing sulfur hexafluoride under the condition that a fluorine-preparing technology can not be obtained. The technology disclosed by the invention has reasonable process, is simply used for manufacturing sulfur hexafluoride, and is the simplest and ideal technology for sulfur hexafluoride preparation.

Description

technical field [0001] The invention relates to a chemical product, in particular to a technology for producing sulfur hexafluoride by reacting nitrosyl fluoride with chlorine gas and sulfur dichloride, which is suitable for producing sulfur hexafluoride. Background technique [0002] This product is one of the substances with the best known chemical stability, and its inertness is similar to that of nitrogen. It has excellent thermal stability, and it does not decompose even at temperatures above 500°C in its pure state. Sulfur hexafluoride has excellent electrical insulation and arc extinguishing properties. Under the same conditions, its insulation capacity is more than 2.5 times that of air and nitrogen, and its arc extinguishing capacity is 100 times that of air. The melting point of sulfur hexafluoride is -50.8°C, it can be used as a special refrigerant in the temperature range of -45~0°C, and because of its good heat resistance, it is a stable high-temperature heat c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/45
Inventor 原东凤
Owner TIANJIN TAIYUAN INDAL GAS