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

A kind of method that catalyzes acetylene dichloroethane to prepare vinyl chloride

A technology of acetylene dichloroethane and dichloroethane, applied in the field of vinyl chloride preparation technology, can solve problems such as environmental pollution, and achieve the effects of avoiding complex equipment, not easy to run off, and solving the problem of high temperature energy consumption

Active Publication Date: 2016-03-23
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a process for preparing vinyl chloride by catalyzing the reaction of acetylene and ethylene dichloride, and solve the technical problem that the acetylene process generally uses a loaded mercuric chloride catalyst in the prior art and causes serious environmental pollution.

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

[0016] Dissolve 5 g of strontium chloride and 7.5 g of cyanoacetamide in 200 ml of deionized water to prepare an immersion solution. 100g of coal-based activated carbon treated with hydrochloric acid was added, mixed uniformly, and immersed for 4 hours, activated by blowing nitrogen at a high temperature of 650°C for 6 hours, to prepare a nitrogen modified catalyst. The acetylene and dichloroethane vapor were mixed at 1:1.2, and passed into a fixed-bed reactor equipped with the prepared nitrogen modified catalyst for reaction. The reaction space velocity was 42h -1 The reaction temperature is controlled at 260°C, the reacted gas is cooled to room temperature, the liquid unreacted dichloroethane is separated first, and then the remaining gas is frozen and compressed to obtain liquid vinyl chloride. Based on acetylene, the primary conversion rate is over 80%, and the selectivity of vinyl chloride is over 90%.

Embodiment 2

[0018] Dissolve 5 g of strontium chloride and 7.5 g of cyanoacetamide in 200 ml of deionized water to prepare an immersion solution. 100g of coal-based activated carbon treated with hydrochloric acid was added, mixed uniformly, and immersed for 6 hours, and activated with nitrogen at a high temperature of 650°C for 6 hours to prepare a nitrogen modified catalyst. The acetylene and dichloroethane vapor were mixed at 1:1.2, and passed into a fixed-bed reactor equipped with the prepared nitrogen modified catalyst for reaction. The reaction space velocity was 42h -1 The reaction temperature is controlled at 240°C, the reacted gas is cooled to room temperature, the liquid unreacted dichloroethane is separated first, and then the remaining gas is frozen and compressed to obtain liquid vinyl chloride. In terms of acetylene, the primary conversion rate is over 60%, and the selectivity of vinyl chloride is over 90%.

Embodiment 3

[0020] Dissolve 2 g of strontium chloride and 5 g of acrylamide in 100 ml of deionized water to prepare an immersion solution. 50g of coal-based activated carbon treated with hydrochloric acid was added, mixed uniformly, and immersed at room temperature for 12 hours, and activated with nitrogen at a high temperature of 600°C for 6 hours to prepare a nitrogen modified catalyst. The acetylene and dichloroethane vapor were mixed at 1:1.1, and passed into a fixed-bed reactor equipped with the nitrogen-modified catalyst prepared for reaction. The reaction space velocity was 42h -1 The reaction temperature is controlled at 260°C, the reacted gas is cooled to room temperature, the liquid unreacted dichloroethane is separated first, and then the remaining gas is frozen and compressed to obtain liquid vinyl chloride. Based on acetylene, the primary conversion rate is over 80%, and the selectivity of vinyl chloride is over 90%.

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 preparing vinyl chloride through catalyzing acetylene and dichloroethane to react. The method comprises the steps: mixing acetylene and dichloroethane steam according to a molar ratio of 1:1-1:4, then introducing into a fixed bed reactor provided with a nitrogen modified catalyst, and carrying out a reaction with the reaction temperature of 180-300 DEG C and the air speed of 20-120 h<-1>. The nitrogen modified catalyst takes active carbon as a carrier, and is loaded with a metal salt compound and a nitrogen-containing compound; based on the total mass of the catalyst, the mass percentage of the metal salt compound is 0.01-10%, and the mass percentage of the nitrogen-containing compound is 0.01-10%. Vinyl chloride prepared by the method has the characteristics of high acetylene conversion rate and high vinyl chloride selectivity; and the nitrogen modified catalyst preparation process adopted in the process method is simple, and the cost is low.

Description

Technical field [0001] The invention belongs to the technical field of vinyl chloride preparation technology, and specifically relates to a method for preparing vinyl chloride by catalyzing acetylene dichloroethane. Background technique [0002] Vinyl chloride is a very important chemical raw material, mainly used to produce polyvinyl chloride resin. Polyvinyl chloride is one of the world's five major engineering plastics and has a wide range of applications in various industries. The current industrial synthesis methods of vinyl chloride monomer mainly include acetylene hydrochlorination and ethylene oxychlorination. The ethylene oxychlorination method uses ethylene, hydrogen chloride and oxygen to perform oxychlorination or chlorination of ethylene to generate dichloroethane, and thermal cracking of dichloroethane to generate vinyl chloride, while producing hydrogen chloride as a by-product. Acetylene hydrochlorination is a method in which acetylene and hydrogen chloride are ...

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): C07C21/06C07C17/25C07C17/08B01J27/24
Inventor 姜标王雯娟沈兆兵
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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