Title:
METHOD FOR PREPARATION OF HIGH PURITY (METH)ACRYLIC ACID
Document Type and Number:
WIPO Patent Application WO/2024/049107
Kind Code:
A1
Abstract:
The present invention provides a method for preparing (meth)acrylic acid, comprising the steps of: obtaining a (meth)acrylic acid aqueous solution by contacting a mixed gas containing (meth)acrylic acid with water in an absorption tower; supplying the (meth)acrylic acid aqueous solution to an extraction tower, extracting the (meth)acrylic acid aqueous solution by contacting same with an extraction solvent to obtain an extract solution containing the (meth)acrylic acid and the extraction solvent; supplying the extract solution to a solvent purification tower and separating the solvent purification tower into a solvent purification tower lower discharge stream containing (meth)acrylic acid and a solvent purification tower upper discharge stream containing an extraction solvent; supplying the solvent purification tower lower discharge stream to a crystallizer and obtaining (meth)acrylic acid crystallized in the crystallizer; and supplying the mother liquor after the crystallization to a high boiling point by-product separation tower, and circulating a high boiling point by-product separation tower upper discharge stream from which the high boiling point by-product has been removed to the solvent purification tower.
Inventors:
YOO SUNG JIN (KR)
JANG KYUNG SOO (KR)
LEE SUNG KYU (KR)
JANG KYUNG SOO (KR)
LEE SUNG KYU (KR)
Application Number:
PCT/KR2023/012565
Publication Date:
March 07, 2024
Filing Date:
August 24, 2023
Export Citation:
Assignee:
LG CHEMICAL LTD (KR)
International Classes:
C07C51/43; C07C57/04
Foreign References:
| JP2013151455A | 2013-08-08 | |||
| KR100932467B1 | 2009-12-17 | |||
| KR100665732B1 | 2007-01-09 | |||
| KR20180136535A | 2018-12-24 | |||
| JP2007182437A | 2007-07-19 |
Attorney, Agent or Firm:
P&P PATENT LAW FIRM (KR)
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