METHOD FOR PREPARING ISOPROPYL ALCOHOL

WIPO Patent Application WO/2024/039022

A1

The present invention relates to a method for producing IPA, the method comprising a purification step using multiple columns, wherein: through a first column, a feed stream containing IPA, NPA, water, and high-boiling point organic matter is separated into a top stream containing a mixture of IPA, NPA, and water, and a bottom stream containing water and high-boiling point organic matter; in the second column, an organic solvent is used to discharge a bottom stream containing IPA and NPA and a top stream where a ternary azeotrope of the solvent, water, and IPA is formed from the top stream of the first column; in the third column having a dividing wall structure, a mixed stream obtained by mixing a branch stream from the bottom stream of the first column and the bottom stream from the second column is supplied to a first region and the mixed stream is separated into a top stream containing water with the high-boiling point organic matter removed therefrom, a side stream containing IPA with NPA removed therefrom, and a bottom stream containing the high-boiling point organic matter and NPA; and the side stream containing IPA is recovered from a second region.

HWANG SUNG JUNE (KR)
LEE SUNG KYU (KR)
KIM SUNG KYUN (KR)
JANG KYUNG SOO (KR)

PCT/KR2023/007922

February 22, 2024

June 09, 2023

Click for automatic bibliography generation  

LG CHEMICAL LTD (KR)

C07C29/88; C07C29/76; C07C31/10

WO2020111439A1	2020-06-04
WO2018135408A1	2018-07-26

KR20150021483A	2015-03-02
KR20040085710A	2004-10-08
CN105712839A	2016-06-29

P&P PATENT LAW FIRM (KR)

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