Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Comprehensive utilization method of mixed gas containing hydrogen fluoride and hydrogen chloride

A technology of mixed gas and hydrogen chloride, applied in chemical instruments and methods, preparation of amino compounds, preparation of organic compounds, etc., can solve the problems of low utilization rate of resources, large discharge of acidic wastewater, difficult treatment of fluorine-containing hydrochloric acid, etc. It has strong performance, high processing efficiency, and the effect of promoting energy saving, emission reduction and cleaner production.

Active Publication Date: 2020-10-16
DO FLUORIDE CHEM CO LTD
View PDF8 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the above technical problems, the object of the present invention is to provide a comprehensive utilization method of the mixed gas containing hydrogen fluoride and hydrogen chloride, which uses a simple absorption separation method to directly process the mixed gas containing hydrogen fluoride and hydrogen chloride in the fluorine chemical industry, and realizes low The high-efficiency and high-quality utilization of high-grade fluorine and chlorine resources solves the problems of difficult treatment of fluorine-containing hydrochloric acid, large discharge of acidic wastewater, and low resource utilization in traditional processes.

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Comprehensive utilization method of mixed gas containing hydrogen fluoride and hydrogen chloride
  • Comprehensive utilization method of mixed gas containing hydrogen fluoride and hydrogen chloride
  • Comprehensive utilization method of mixed gas containing hydrogen fluoride and hydrogen chloride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] A comprehensive utilization method of a mixed gas containing hydrogen fluoride and hydrogen chloride, said method specifically comprising the following steps:

[0028] 1) Gas absorption

[0029] Nitrogen gas was introduced in advance to replace the air in the two-stage reactor system connected in series from head to tail, and the treatment time was 10 minutes. Then add triethylamine to the two reactors to 50% of the reactor volume; start stirring, so that the mixed tail gas containing hydrogen fluoride and hydrogen chloride is first passed into the primary reactor under the liquid level of triethylamine, and the reaction temperature is controlled at 10°C and the pressure -5KPa. The unabsorbed hydrogen fluoride and hydrogen chloride gas enter the next-stage reactor through the gas phase connecting pipeline for reaction;

[0030] When the solid content in the primary reactor reached 20%, the reaction solution was discharged from the reactor feeding port and filtered, an...

Embodiment 2

[0037] A comprehensive utilization method of a mixed gas containing hydrogen fluoride and hydrogen chloride, said method specifically comprising the following steps:

[0038] 1) Gas absorption

[0039] Nitrogen gas was introduced in advance to replace the three-stage reactor system, and the treatment time was 20 minutes. Then add triethylamine to the three reactors to 60% of the reactor volume; start stirring, so that the mixed tail gas containing hydrogen fluoride and hydrogen chloride is first passed into the primary reactor under the liquid level of triethylamine, and the reaction temperature is controlled at 25 ° C, the pressure -2.5KPa. The unabsorbed hydrogen fluoride and hydrogen chloride gas enter the next-stage reactor step by step through the gas-phase connection pipeline for absorption reaction;

[0040] When the solid content in the first-stage reactor reaches 30%, the reaction solution is discharged from the reactor outlet and filtered, and the content of F in t...

Embodiment 3

[0047] 1) Gas absorption

[0048] The four-stage reactor system was replaced by argon gas in advance, and the treatment time was 30 minutes. Then add triethylamine to the four reactors to 75% of the reactor volume; start stirring, so that the mixed tail gas containing hydrogen fluoride and hydrogen chloride is first passed into the primary reactor under the liquid level of triethylamine, and the reaction temperature is controlled at 40 ° C. Pressure -1KPa. The unabsorbed hydrogen fluoride and hydrogen chloride gas enter the next-stage reactor step by step through the gas-phase connection pipeline for absorption reaction;

[0049] When the solid content in the first-stage reactor reaches 40%, the reaction solution is discharged from the feed port of the reactor and filtered, and the content of F in the filtrate is measured, and the solid paste obtained is the crude product of triethylamine hydrochloride. Then, the reaction liquid in the secondary reactor is poured into the pr...

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 belongs to the technical field of fluorine chemical industry, and particularly relates to a comprehensive utilization method of mixed gas containing hydrogen fluoride and hydrogen chloride. Triethylamine is used for multistage absorption of mixed gas containing hydrogen fluoride and hydrogen chloride; the generated triethylamine hydrochloride is a precipitate, and triethylamine trihydrofluoride is a solution, so that the separation of the product can be realized through simple solid-liquid separation, and then the conversion from low-value hydrogen fluoride and hydrogen chlorideto high-value triethylamine trihydrofluoride and triethylamine hydrochloride products is completed through a subsequent refining process. The method has the advantages of simple process, strong operability, high added value of products, capability of meeting the requirements of the organic fluorine industry, closed cycle of the process, no secondary pollution and the like.

Description

technical field [0001] The invention belongs to the technical field of fluorine chemical industry, and in particular relates to a comprehensive utilization method of mixed gas containing hydrogen fluoride and hydrogen chloride. Background technique [0002] During the production process of fluorine chemical industry, a large amount of mixed tail gas containing hydrogen fluoride and hydrogen chloride will be produced. At present, the usual treatment method is to absorb fluorine-containing hydrochloric acid with water, and then separate it by precipitating fluorine. However, due to the active chemical properties of fluorine and chlorine, the treatment is difficult, and a large amount of fluorine-containing and chlorine-containing acidic wastewater will be generated during the treatment process, causing secondary pollution to the environment. Therefore, seeking a more effective treatment method for the mixed tail gas containing hydrogen fluoride and hydrogen chloride is an impo...

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
Patent Type & Authority Applications(China)
IPC IPC(8): C07C209/00C07C209/86C07C211/05
CPCC07C209/00C07C209/86C07C211/05
Inventor 李云峰薛旭金韩建军耿梦湍李凌云段宾李喜叶家铭张亚辉
Owner DO FLUORIDE CHEM CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com