METHOD FOR REFINING NON-PETROLEUM-BASED ETHYLENE GLYCOL

WIPO Patent Application WO/2020/048444

A1

Provided in the present invention is a method for refining non-petroleum-based ethylene glycol, wherein impurities having a boiling point close to that of ethylene glycol are separated. In the described method, C5-C20 lipophilic alcohol compounds, C5-C20 alkanes and/or C4-C20 lipophilic ketone compounds are used as entrainers to perform azeotropy with non-petroleum-based ethylene glycol to obtain an azeotrope containing ethylene glycol; then, the entrainers in the azeotrope are separated and removed to obtain a crude product of ethylene glycol, and the crude product of ethylene glycol is further purified to obtain ethylene glycol.

WO/2022/030380	POLAR ORGANIC SOLVENT PURIFICATION METHOD, POLAR ORGANIC SOLVENT PURIFICATION DEVICE, ANALYSIS METHOD AND PURIFIED POLAR ORGANIC SOLVENT PRODUCTION METHOD
WO/2001/094284	PROCESS FOR PRODUCING ULTRA-HIGH PURITY ISOPROPANOL
JP2000086558	PROCESS FOR ISOLATING POLYFUNCTIONAL ALCOHOL FROM WATER- BASED WATER-SOLUBLE SALT SOLUTION

YUAN YI (CN)

PCT/CN2019/104167

March 12, 2020

September 03, 2019

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CHANGCHUN MEIHE SCIENCE AND TECH DEVELOPMENT CO LTD (CN)

C07C29/76; C07C29/86; C07C31/20

CN101302158A	2008-11-12
US5425853A	1995-06-20
US4966658A	1990-10-30
US4935102A	1990-06-19
US4966658A	1990-10-30
US5423955A	1995-06-13
US8906205B2	2014-12-09
CN106946654A	2017-07-14

See also references of EP 3848346A4

CHINA PATENT AGENT (H.K.) LTD. (CN)

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