Check patentability & draft patents in minutes with Patsnap Eureka AI!

A kind of method for producing 1,1,2-trichloroethane by photochlorination of vinyl chloride

A technology of trichloroethane and vinyl chloride, which is applied in the field of preparation of organic intermediates, can solve the problems of excessive three wastes and easy coking, and achieve the effects of improving production capacity, environmental protection, and reducing the reaction process

Active Publication Date: 2022-04-12
常州新东化工发展有限公司
View PDF1 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The methods for industrial production of 1,1,2-trichloroethane mainly include vinyl chloride (VCM) chlorination method and 1,2-dichloroethane (EDC) chlorination method, and the EDC chlorination method is prone to deep chlorination products, the VCM chlorination method has mild reaction conditions and relatively mature technology. Almost all domestic manufacturers use this route, but most of them use iron-based catalysts, which are easy to coke, and there are many three wastes. The use of photochlorination requires pressurized reaction to increase equipment production capacity. device

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
  • A kind of method for producing 1,1,2-trichloroethane by photochlorination of vinyl chloride
  • A kind of method for producing 1,1,2-trichloroethane by photochlorination of vinyl chloride

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In a rectification tower with a diameter of 0.8m and 15 trays, the number of trays in the reactive distillation area is 1, and the number of trays in the stripping area is 14. 3 The tank-type side reactors are connected, in which the condensate of the vapor phase material at the top of the tower and the 1,2-dichloroethane absorption liquid of the tail gas all enter the first side reactor, and the outlet materials of the side reactor are returned to the first column of the rectification tower Plates (the number of plates is counted from top to bottom), and the material between the rectification column and the side reactor is transported by a pump.

[0026] The side reactor is equipped with a light source of partial ultraviolet wavelength and 1,2-dichloroethane. The feed flow rate of tail gas 1,2-dichloroethane absorption liquid to the side reactor is 0.2kmol / h, the feed flow rate of vinyl chloride to the side reactor is 4kmol / h, and the feed rate of chlorine gas to the s...

Embodiment 2

[0028] In a rectification tower with a diameter of 0.8m and 15 trays, there are 7 trays in the reactive distillation area and 8 trays in the stripping area, and 2 units with a volume of 3m 3 The tank-type reactors are connected, and the number of plates between the reactors is 5. Among them, the condensate of the vapor phase material at the top of the tower and the 1,2-dichloroethane absorption liquid of the tail gas all enter the first side reactor. The material from the outlet of the reactor returns to the first tray of the rectification tower (the number of trays is counted from top to bottom); the material from the sixth rectification tray enters the second reactor, and the outlet material of the side reactor returns to the rectification On the 7th tray of the tower, the material between the rectification tower and the side reactor is transported by a pump.

[0029] Each side reactor is equipped with a light source of partial ultraviolet wavelength and 1,2-dichloroethane. ...

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 method for producing 1,1,2-trichloroethane by photochlorination of vinyl chloride. The method adopts a reactive distillation integrated device mainly composed of a rectification tower and a side reactor coupled to combine 1, 2-Dichloroethane is fed into the first side reactor coupled with the rectification tower through the raw gas recovery tower, and chlorine and vinyl chloride are continuously fed into each side reactor connected with the rectification tower. In the side reactor A chlorination reaction occurs under photocatalytic conditions, and the liquid phase material obtained by the reaction enters the rectification tower, and the desired product is obtained from the rectification tower tank; or when there are more than two side reactors, the liquid phase material of the rectification tower is After extraction, it enters the next-stage side reactor to continue the chlorination reaction, and then returns to the next extraction tray to obtain the desired product from the still of the rectification column. The advantage of the present invention is that 1,1,2-trichloroethane is prepared by coupling technology of normal pressure reaction and vacuum rectification, which reduces the high boiling of 1,2-dichloroethane and avoids the high boiling point caused by iron-based catalysts. problem, improve the production capacity of photochlorination.

Description

technical field [0001] The invention relates to the field of preparation of organic intermediates, in particular to a method for producing 1,1,2-trichloroethane by photochlorination of vinyl chloride. Background technique [0002] 1,1,2-Trichloroethane is an important organic intermediate, such as can be used to prepare 1,1-dichloroethylene, trans-1,2-dichloroethylene, cis-1,2-dichloroethylene . These isomer products have high industrial value. For example, 1,1-dichloroethylene is a chemical raw material for food packaging, refrigerants, etc., and cis-1,2-dichloroethylene is used in extraction agents, refrigerants and other fields. [0003] The methods for industrial production of 1,1,2-trichloroethane mainly include vinyl chloride (VCM) chlorination method and 1,2-dichloroethane (EDC) chlorination method, and the EDC chlorination method is prone to deep chlorination products, the VCM chlorination method has mild reaction conditions and relatively mature technology. Almost...

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): C07C19/05C07C17/04C07C17/386
CPCC07C17/04C07C17/386C07C19/05Y02P20/10
Inventor 朱成明毛素华孙运林张驰马凯吴发明刘向超董亮陶文平王顺利
Owner 常州新东化工发展有限公司
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com