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

A tail gas treatment method for co-production of hydrofluoric acid and organic carbonate

A technology for tail gas treatment and hydrofluoric acid, applied in chemical instruments and methods, preparation of organic compounds, preparation of carbonate/haloformate, etc., to achieve controllable molecular weight and molecular weight distribution, controllable structure, and simple post-processing Effect

Active Publication Date: 2022-03-29
四川晨光博达新材料有限公司
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention aims to solve the problem of conversion and reuse of carbonyl fluoride tail gas, and provides a new carbonyl fluoride tail gas treatment method, which not only solves the disadvantages of the traditional carbonyl fluoride water treatment method, but introduces hydroxyl-containing The tail gas treatment of carbonyl fluoride can be carried out without a catalyst, and the co-production of organic carbonate and hydrofluoric acid can be realized. The production process is simple and more conducive to environmental protection.

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

[0035] The specific preparation method is as follows:

[0036] (1) Prepare sodium silicate solution and capping agent respectively,

[0037] Sodium silicate solution: add 50 g of sodium silicate to 100 ml of water, stir and mix evenly to obtain a sodium silicate solution.

[0038] End-capping agent: 20 g of hexamethyldisiloxane and 10 g of vinyl single cap were added to 150 g of methanol to obtain a mixed solution.

[0039] (2) Hydrolytic condensation,

[0040] Take 50 g of hydrochloric acid and add it to the reaction kettle. The temperature in the reaction kettle is 0 °C, start stirring, and add sodium silicate solution during the stirring process, keep stirring and carry out the reaction. Continue to stir and heat up. After the end-capping agent is added, the temperature is raised to 40° C. to carry out the reaction, and the heating and stirring are continued. Finally, 100 g of hexamethyldisiloxane is added for extraction, and the organic mixture is obtained after refluxin...

Embodiment 2

[0047] The specific preparation method is as follows:

[0048] (1) Prepare sodium silicate solution and capping agent respectively,

[0049]Sodium silicate solution: add 200 g of sodium silicate to 400 ml of water, stir and mix evenly to obtain a sodium silicate solution.

[0050] End-capping agent: 100 g of hexamethyldisiloxane and 50 g of vinyl single cap were added to 350 g of ethanol to obtain a mixed solution.

[0051] (2) hydrolytic condensation,

[0052] Take 150g of sulfuric acid and add it to the reaction kettle. The temperature in the reaction kettle is 35°C, start stirring, and add sodium silicate solution during the stirring process, keep stirring and carry out the reaction. After the sodium silicate solution is added, the reaction is 120s. , continue to stir and heat up, after the end-capping agent is added, the temperature is raised to 105 ° C to carry out the reaction, and the heating and stirring are continued; finally, 300 g of hexamethyldisiloxane is added ...

Embodiment 3

[0059] The specific preparation method is as follows:

[0060] (1) Prepare sodium silicate solution and capping agent respectively,

[0061] Sodium silicate solution: add 150 g of sodium silicate to 320 ml of water, stir and mix evenly to obtain a sodium silicate solution.

[0062] End-capping agent: 40 g of hexamethyldisiloxane and 30 g of vinyl single cap were added to 250 g of ethanol to obtain a mixed solution.

[0063] (2) hydrolytic condensation,

[0064] Take 120g of hydrochloric acid and add it to the reaction kettle. The temperature in the reaction kettle is 18°C, start stirring, and add sodium silicate solution during the stirring process, keep stirring and carry out the reaction. After the sodium silicate solution is added, the reaction is 20s. , continue to stir and heat up, after the end-capping agent is added, the temperature is raised to 95 ° C to carry out the reaction, and the heating and stirring are continued; finally, 180 g of hexamethyldisiloxane is adde...

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 discloses a tail gas treatment method for the co-production of hydrofluoric acid and organic carbonate. Carbonyl fluoride tail gas is reacted with hydroxyl-containing compounds at a molar ratio of (0.1-2):1, and the reaction temperature is controlled to be 0-90 ℃, the reaction time is 0.5~6h, and organic carbonate and hydrofluoric acid are obtained. The method of the present invention solves the disadvantages of the traditional carbonyl fluoride water treatment method, and for the first time introduces hydroxyl-containing compounds into the tail gas treatment of carbonyl fluoride, and can react under the condition of no catalyst, and realize the co-production of organic carbonate and hydrofluoric acid, The production process is simple and more conducive to environmental protection.

Description

technical field [0001] The invention relates to a tail gas treatment method for co-producing hydrofluoric acid and organic carbonate, in particular to a method for producing tail gas co-producing hydrofluoric acid and organic carbonate by using a perfluoropolyether-based surfactant, and belongs to the field of organic synthesis. Background technique [0002] Perfluorooctanoic acid and its derivatives have a series of problems such as bioaccumulation, persistent pollution and toxicity to the environment, and the United Nations Environment Programme Organic Pollutants Review Committee has determined that it meets the criteria for persistent organic pollutants. It is of great significance to develop new products to replace perfluorooctanoate. At present, perfluoropolyether-based surfactants are produced by photo-oxidation of hexafluoropropylene, which can successfully replace PFOA and its salts in the polymerization of PTFE and PVDF. Contains carbonyl fluoride, nitrogen, oxyge...

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 Patents(China)
IPC IPC(8): C08G64/22C08G64/02C08G65/30C08G77/20C08G77/16C08G77/06C07C68/00C07C69/96
CPCC08G64/226C08G64/0266C08G64/0291C08G65/30C08G77/16C08G77/20C08G77/06C07C68/00C07C69/96
Inventor 张秀兰梁荣超刘皓
Owner 四川晨光博达新材料有限公司
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