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

Anhydrous hydrogen fluoride preparation process

An anhydrous hydrogen fluoride and process technology, which is applied in the field of anhydrous hydrogen fluoride preparation process, can solve the problems of shortening the maintenance period of the device, reducing the heat transfer efficiency of the rotary furnace, and scaling on the inner wall of the rotary reaction furnace.

Active Publication Date: 2018-12-07
FUJIAN LONGFU CHEM
View PDF10 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Prior art 1 and prior art 2 hydrofluoric acid reaction devices are currently commonly used rotary reactors, and their disadvantages are: the fluorite produced by the reaction covers the fluorite on the one hand and hinders the reaction from continuing, and on the other hand adheres to the rotary reaction furnace. On the inner wall of the furnace, the lining of the rotary reactor drum is corroded, which shortens the maintenance cycle of the device, and at the same time causes fouling on the inner wall of the rotary reactor, which reduces the heat transfer efficiency of the rotary furnace
Hydrogen fluoride separation and impurity refining devices are currently commonly used pre-purification towers, scrubbers, condensers, rectification towers and degassing towers. Among them, washing and condensation are usually one of the processes for refining anhydrous hydrogen fluoride. The existing technical problems mainly include washing The washing acid from the bottom of the tower enters the washing circulation storage tank. The washing acid pipeline is generally inserted into the washing circulation storage tank below the liquid level of 800mm. The gas pipe that transports hydrofluoric acid gas is blocked and flows back to the reaction furnace, causing corrosion to the reaction furnace body

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
  • Anhydrous hydrogen fluoride preparation process
  • Anhydrous hydrogen fluoride preparation process
  • Anhydrous hydrogen fluoride preparation process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0046] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0047] Such as figure 1 , figure 2 , image 3 , Figure 4 , Figure 5 , Image 6 , Figure 7 , Figure 8 Shown, a kind of anhydrous hydrogen fluoride preparation process is characterized in that:

[0048] It includes circulating fluidized bed reaction process, granular layer moving bed filtration process, washing and condensation process, circulating fluidized bed rectification process, circulating fluidized bed degassing process, and tail gas environmental protection treatment process.

[0049] Process 1, circulating fluidized bed reaction process, fluorite is crushed into 3~5mm and sieved, the sulfuric acid recovered from the packed absorption tower VII and circulating fluidized bed rectification tower Ⅴ is mixed according to the mass ratio of 1:1.2~1.3 for later use, and the heat medium And the conveying medium is 300~450℃, 0.1MPa s...

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

PropertyMeasurementUnit
boiling pointaaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention relates to the technical field of fluorine chemicals and in particular relates to an anhydrous hydrogen fluoride preparation process. The process is characterized by comprising the following steps: circulating fluidized bed reaction, granular moving bed filtration, washing and condensing, circulating fluidized bed distillation, circulating fluidized bed degassing and environmental-friendly tail gas treatment.

Description

technical field [0001] The invention relates to the technical field of fluorine chemical industry, in particular to a preparation process of anhydrous hydrogen fluoride. Background technique [0002] Anhydrous hydrogen fluoride has been widely used in electronics, chemical industry, petroleum and other industries. It is mainly used for the preparation of fluorine salts, fluorohaloalkanes, fluorine refrigerants, corrosion of glass, impregnation of wood, and electrolysis of elemental fluorine. Chinese invention patent (patent number CN201310287202.4, patent name is a production method of anhydrous hydrogen fluoride) discloses a production method of anhydrous hydrogen fluoride, which is characterized in that it includes the following steps: feeding fluorite powder and sulfuric acid into the pre-reactor ; In the pre-reactor, sulfuric acid and fluorite powder are fully mixed and reacted at the same time to generate crude hydrogen fluoride gas; the crude hydrogen fluoride gas is r...

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): C01B7/19
CPCC01B7/192
Inventor 杨松
Owner FUJIAN LONGFU CHEM
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