Supercharge Your Innovation With Domain-Expert AI Agents!

Method for recovering ethylene and vinyl-based comonomer

A comonomer and vinyl technology, which is applied in the field of recycling ethylene and vinyl-based comonomers, can solve the problems of high cost, consumption, and insufficient recycling, and achieve the effect of cost minimization

Active Publication Date: 2018-06-08
LG CHEM LTD
View PDF6 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] However, there is also a limitation that unreacted monomers cannot be recovered sufficiently from the final product
There is also a limitation in terms of process efficiency, i.e. a significant cost is consumed in the compression process used to feed the depressurized unreacted monomer to the high pressure reactor

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
  • Method for recovering ethylene and vinyl-based comonomer
  • Method for recovering ethylene and vinyl-based comonomer
  • Method for recovering ethylene and vinyl-based comonomer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 to 7

[0056]

[0057] refer to figure 1 , Vinyl acetate monomer from vessel 1 and ethylene monomer from vessel 2 were respectively fed into reactor 3 at a temperature of about 150° C. to 250° C. and a pressure of 2000 bar for radical polymerization. After the reaction is complete, the mixture of ethylene-vinyl acetate polymer and unreacted monomers in the reactor 3 is transferred to the first separator 4 at a temperature of about 200°C to 250°C and a pressure of 250 bar.

[0058] In the first separator 4, the mixture of unreacted monomers is separated in a gaseous state in the upper part of the first separator 4, and the mixture of ethylene-vinyl acetate polymer and some unreacted monomers is separated in the lower part of the first separator 4 Separated in liquid phase. The mixture of unreacted monomers separated in the upper part of the first separator 4 was compressed to a pressure of 2000 bar by the first compressor 7 having a pressure of 250 bar, and then polymerized in the...

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 present invention relates to a method for recovering ethylene and a vinyl-based comonomer, the method improving the recovery rate of unreacted monomers remaining after the polymerization reactionof ethylene and a vinyl-based comonomer, and enabling process efficiency to increase through a cost reduction. Specifically, the method for recovering ethylene and a vinyl-based comonomer can comprisethe steps of: polymerizing ethylene and a vinyl-based comonomer at a pressure of 1,500 bar or higher; reducing, to 0.1-5 bar, the pressure of the product of the polymerization step, comprising an ethylene-vinyl-based comonomer copolymer, ethylene, and a vinyl-based comonomer; adding ethylene to the product of the polymerization step under the pressure of 0.1-5 bar; and separating ethylene and a vinyl-based copolymer from the product of the polymerization step in which the ethylene is added.

Description

technical field [0001] Cross References to Related Applications [0002] This application claims the benefit of priority from Korean Patent Application No. 10-2016-0119375 filed with the Korean Intellectual Property Office on Sep. 19, 2016, the entire contents of which are incorporated herein by reference. [0003] The present invention relates to a process for the recovery of ethylene and vinyl-based comonomers. More specifically, the present invention relates to a method for recovering ethylene and vinyl-based comonomers, which improves the recovery of unreacted monomers remaining after polymerization of ethylene and vinyl-based comonomers, and by Reduce costs to increase process efficiency. Background technique [0004] The ethylene copolymer is a material in which various vinyl-based comonomers have been introduced into the existing properties of LDPE (low density polyethylene), and it has been developed for various uses and widely commercialized. [0005] Ethylene c...

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): C08F6/00C08F210/02C08F2/00C08J11/02
CPCC08F6/001C08L101/00C08L23/0815C08L23/0853C08F210/02C08F2/00C08J11/02C08F6/005
Inventor 申大荣周垠廷申俊浩许畅会张诚根
Owner LG CHEM LTD
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