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Title:
METHOD FOR RECOVERING STYRENE MONOMERS FROM WASTE POLYSTYRENE
Document Type and Number:
WIPO Patent Application WO/2022/220634
Kind Code:
A1
Abstract:
The present invention relates to a method for recovering styrene monomers from waste polystyrene, and more specifically, to a method for recovering styrene monomers from waste polystyrene, wherein the waste polystyrene is depolymerized using an eco-friendly solvent and a potassium-containing carbonate depolymerization catalyst to suppress the generation of ethylbenzene, etc. generated as by-product in a styrene monomer recovery step, and thus the styrene monomers can be recovered in high yield.

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Inventors:
YUN GWANG NAM (KR)
HWANG DONG WON (KR)
HWANG YOUNG KYU (KR)
HONG DO YOUNG (KR)
Application Number:
PCT/KR2022/005448
Publication Date:
October 20, 2022
Filing Date:
April 15, 2022
Export Citation:
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Assignee:
KOREA RES INST CHEMICAL TECH (KR)
International Classes:
C07C7/148; C07C7/20; C07C15/46; C08J11/16; C08J11/18; C08J11/22
Foreign References:
KR20020023472A2002-03-29
JP2005154525A2005-06-16
JP2000191825A2000-07-11
JP2007291039A2007-11-08
KR20200033508A2020-03-30
JP2001294708A2001-09-26
KR20010087093A2001-12-28
KR20030081717A2003-11-18
Other References:
IND. ENG. RES, vol. 34, no. 12, 1995, pages 4519
Attorney, Agent or Firm:
GHONG-GAN INTERNATIONAL PATENT LAW FIRM (KR)
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