METHOD AND APPARATUS FOR RECOVERING SOLVENT

Title:

METHOD AND APPARATUS FOR RECOVERING SOLVENT

Document Type and Number:

WIPO Patent Application WO/2022/019418

Kind Code:

A1

Abstract:

The present invention relates to a method for recovering a solvent and, more specifically, provides a method for recovering a solvent, the method comprising the steps of: feeding polymerization reactants including one or more monomers and a solvent into a reactor to obtain a polymeric solution (S10); feeding a stream containing the polymeric solution into a separator to separate an overhead discharge stream containing the solvent as a gas phase and a bottom discharge stream containing the polymeric solution (S20); and heating, by a heater, a branch stream obtained by branching of some of the bottom discharge stream of the separator and then refluxing the branch stream to the separator, and feeding a remainder stream containing the remainder of the bottom discharge stream of the separator into a steam stripping process unit (S30), wherein the branch stream refluxed to the separator after being heated by the heater has a vapor fraction adjusted by a pressure control valve.

Inventors:

OH SUK YUNG (KR)
KO JUN SEOK (KR)
KIM KWAN SIK (KR)
SHIN JOON HO (KR)
LYU BYEONG GIL (KR)
LEE SE KYUNG (KR)

Application Number:

PCT/KR2021/000603

Publication Date:

January 27, 2022

Filing Date:

January 15, 2021

Export Citation:

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Assignee:

LG CHEMICAL LTD (KR)

International Classes:

C08F6/00; B01D3/00; C08F2/01; C08F6/10

Foreign References:

KR20160058143A	2016-05-24
KR20180037673A	2018-04-13
US20090259005A1	2009-10-15
US6187965B1	2001-02-13
KR101529977B1	2015-06-18
KR20170141872A	2017-12-27

Other References: