Method for inhibiting generation of chlorosulfuric acid in thionyl chloride preparation process

A thionyl chloride, preparation process technology, applied in the direction of thionyl chloride, sulfur and halogen compounds, sulfur-halogen-hydrogen-oxygen compounds, etc., can solve the problems of separation, easy introduction of impurities, affecting product quality, etc. Quality, reduction of sulfuryl chloride content, effect of avoiding formation conditions

Inactive Publication Date: 2015-03-25
SHANDONG KAISHENG NEW MATERIALS
View PDF7 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the boiling point of thionyl chloride (78.8°C) is very close to the boiling point of sulfuryl chloride (69°C), it is difficult to completely separate thionyl chloride and sulfuryl chloride by conventional rectification methods, resulting in high sulfuryl chloride content in the product, which seriously affects product quality.
[0003] Aiming at the problem of sulfuryl chloride in thionyl chloride: patent US2529671 proposes a me

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] The method that suppresses sulfuryl chloride generation in the thionyl chloride preparation process:

[0014] The raw material mixture gas composed of sulfur dioxide, sulfur dichloride and chlorine gas at a ratio of 2:1:1 is passed through the preheater to increase the temperature of the mixed gas to 120°C, and the raw material mixture gas with a temperature of 120°C enters the catalytic reactor for reaction, and the reaction produces The crude product thionyl chloride is withdrawn from the lower part of the catalytic reactor, and the sulfuryl chloride content in the obtained crude product thionyl chloride is 0.98%.

Embodiment 2

[0016] The method that suppresses sulfuryl chloride generation in the thionyl chloride preparation process:

[0017] The mixed gas composed of sulfur dioxide, sulfur dichloride and chlorine gas at a ratio of 1:2:1 is passed through the preheater to increase the temperature of the mixed gas to 150°C, and the raw material mixed gas with a temperature of 150°C enters the catalytic reactor for reaction, and the reaction produces The crude thionyl chloride is extracted from the lower part of the catalytic reactor, and the sulfuryl chloride content in the obtained crude thionyl chloride is 0.79%.

Embodiment 3

[0019] The method that suppresses sulfuryl chloride generation in the thionyl chloride preparation process:

[0020] The mixed gas composed of sulfur dioxide, sulfur dichloride and chlorine gas at a ratio of 1:1:1 is passed through the preheater to increase the temperature of the mixed gas to 180°C, and the mixed gas whose temperature reaches 180°C of the raw material enters the catalytic reactor for reaction, and the reaction produces The crude thionyl chloride is extracted from the lower part of the catalytic reactor, and the sulfuryl chloride content in the obtained crude thionyl chloride is 0.85%.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to a method for inhibiting generation of chlorosulfuric acid in a thionyl chloride preparation process. The method comprises the following steps: feeding a raw material gas mixture prepared from sulfur dioxide, sulfur dichloride and chlorine to a catalytic reactor after pre-heating, and reacting to obtain thionyl chloride; and preheating the gas mixture to 120-180 DEG C. Chlorosulfuric acid in a crude product thionyl chloride is inhibited within 1% from 2%, so that the quality of the crude product thionyl chloride is greatly improved; reduction of the content of chlorosulfuric acid in subsequent refined products is facilitated; and the generation condition through chlorosulfuric acid is avoided.

Description

technical field [0001] The invention belongs to the field of chemical technology production, and in particular relates to a method for inhibiting the formation of sulfuryl chloride in the preparation process of thionyl chloride. technical background [0002] At present, most domestic thionyl chloride production enterprises adopt the sulfur dioxide gas phase method, and sulfuryl chloride is inevitably produced in the process of producing thionyl chloride by this method. Since the boiling point of thionyl chloride (78.8°C) is very close to the boiling point of sulfuryl chloride (69°C), it is difficult to completely separate thionyl chloride and sulfuryl chloride by conventional rectification methods, resulting in a high content of sulfuryl chloride in the product, seriously affecting product quality . [0003] Aiming at the problem of sulfuryl chloride in thionyl chloride: patent US2529671 proposes a method for removing impurities in thionyl chloride with organic solvents; pa...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C01B17/46
CPCC01B17/4584
Inventor 谢圣斌毕义霞张泰铭张善民马长山李志忠王志国闫蓓蓓
Owner SHANDONG KAISHENG NEW MATERIALS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap