Channelized fluor alkaline production method capable of improving reaction process selectivity

A technology of reaction process and fluorinated alkanes, which is applied in chemical instruments and methods, chemical/physical processes, organic chemistry, etc. It can solve the problems of poor reaction selectivity and inability to realize graded reaction control of reaction raw materials, so as to reduce corrosion and temperature , the effect of high reaction selectivity

Pending Publication Date: 2019-12-31
JIANGSU SANMEI CHEM +1
View PDF7 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The existing liquid-phase preparation process of fluorinated alkanes usually adopts a tank reactor. The reaction system of this method is uniform and the reaction conditions are consistent. The hierarchical reaction control of the reaction raw materials cannot be realized, and the reaction selectivity is poor.

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
  • Channelized fluor alkaline production method capable of improving reaction process selectivity
  • Channelized fluor alkaline production method capable of improving reaction process selectivity
  • Channelized fluor alkaline production method capable of improving reaction process selectivity

Examples

Experimental program
Comparison scheme
Effect test

preparation example

[0039] A method for pipelined production of fluorinated alkanes that improves the selectivity of the reaction process. In the presence of a fluorinated catalyst, a fluorinated substrate and a fluorinated agent are reacted in a pipelined reactor to obtain the fluorinated alkanes. The fluorinated alkanes have the following general formula: CnH2n+2-x-yClxFy, wherein, n is an integer of 1 to 3; the fluorinating agent is selected from hydrogen fluoride, potassium fluoride, mercury difluoride, and cobalt trifluoride One or more of the fluorinated substrates having the general formula C n h 2n+2-x Cl x , wherein, n is an integer of 1 to 3, x<6, and the fluorination catalyst is selected from one of antimony pentachloride, antimony chlorofluoride, tin tetrachloride, sulfur tetrafluoride and titanium tetrachloride or more; the pipelined reactor includes at least two heating section groups, the heating section group includes at least one heating section, and the heating section groups ...

Embodiment 1

[0060] In Example 1, it is a method for pipelined production of fluorinated alkanes to improve the selectivity of the reaction process. The fluorinated alkanes are specifically difluorochloromethane. Other relevant technical features are not listed in Example 1. Refer to the preparation example.

[0061] In this example, after mixing chloroform and antimony pentachloride at a mass ratio of 10:1, preheat to 50°C at a flow rate of 2m / s, and the fluorinating agent is a mixture of hydrogen fluoride and cobalt trifluoride to The flow rate of 1m / s is preheated to 70°C. After being mixed by a static mixer, it enters a tubular reactor with a volume of 0.2L. The tubular reactor has two heating sections. The temperature of the first heating section is controlled at 80°C. Inject pressurized gas nitrogen to control the pressure of fluorination reaction to 1.0MPa. Hydrogen fluoride and chloroform in the raw material flow are catalyzed by the fluorination catalyst, and the fluorination react...

Embodiment 2

[0068] In Example 2, it is a method for pipelined production of fluorinated alkanes to improve the selectivity of the reaction process. The fluorinated alkanes are specifically difluoromethane. Other relevant technical features are not listed in Example 1. Refer to the preparation example.

[0069] After mixing dichloromethane and antimony pentachloride at a mass ratio of 10:1, preheat to 70°C at a flow rate of 2m / s, preheat to 90°C at a flow rate of 1m / s for hydrogen fluoride, mix them through a static mixer, and enter In a tubular reactor with a volume of 0.2L, the tubular reactor has two heating sections, the temperature of the first heating section is controlled at 100°C, and the pressurized gas nitrogen is filled to control the fluorination reaction pressure to 1.5MPa. Hydrogen fluoride and dichloromethane are catalyzed by a fluorination catalyst, and the fluorination reaction is carried out in a tubular reactor. The resulting reaction liquid includes the product of the fl...

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 provides a channelized fluor alkaline production method capable of improving reaction process selectivity. The channelized fluor alkaline production method capable of improving reactionprocess selectivity comprises the following steps: (1) pumping raw materials from an inlet of a channelized reactor; wherein the channelized reactor comprises at least two sections of heating sectiongroups, each heating section group comprises at least one heating section, the heating section groups are connected in series, and the raw materials are mixed into a reaction solution in the channelized reactor; (2) enabling the reaction liquid to flow through the channelized reactor, and carrying out fluorination reaction to obtain a reaction liquid material flow; (3) enabling the reaction liquidmaterial to flow through the channelized reactor for fluoridation reaction, pre-separating the reaction liquid material flow into a first gas-phase material and a first liquid-phase material; (4) pumping the first liquid-phase material back to the inlet of the channelized reactor; and pumping the first gas-phase material into a separation device, carrying out a separation process, and separatingto obtain the fluor alkanes. The method has the characteristics of small on-line reaction amount, small potential safety hazard, convenience in reaction control, continuous production and low production cost.

Description

technical field [0001] The invention relates to a method for pipelined production of fluorinated alkanes that improves the selectivity of the reaction process. Background technique [0002] Fluorinated alkanes as a class of substances have many different applications including as chemical intermediates, blowing agents and refrigerants. [0003] The ever-increasing demand for environmentally-friendly fluorocarbons for use as refrigerants, blowing agents and solvents constantly stimulates the search for economically attractive solutions to their production. The fluorinated alkanes produced by the process of the present invention may themselves be used as refrigerants, blowing agents or solvents, or as intermediates in the production of other haloalkanes which meet the same needs. [0004] The existing liquid-phase preparation process of fluorinated alkanes usually adopts a tank reactor. This method has a uniform reaction system and uniform reaction conditions, and cannot real...

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): C07C17/20B01J8/06C07C19/10C07C19/08
CPCC07C17/206C07C17/208B01J8/06B01J8/067C07C19/10C07C19/08
Inventor 徐志雄赵恒军沈涛丛鑫鑫钱超
Owner JIANGSU SANMEI CHEM
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