METHOD FOR REFINING BIO-BASED CRUDE ETHYLENE GLYCOL - CHANGCHUN MEIHE SCIENCE AND TECH DEVELOPMENT CO LTD

Title:

METHOD FOR REFINING BIO-BASED CRUDE ETHYLENE GLYCOL

Document Type and Number:

WIPO Patent Application WO/2022/028319

Kind Code:

A1

Abstract:

A method for refining a bio-based crude ethylene glycol, the method comprising: using a bio-based crude ethylene glycol as a raw material, diluting same with water to an ethylene glycol concentration of 1-95 weight%; under the conditions of the temperature being 0-100°C and the volume space velocity being 0.01-20 BV/hr, continuously passing the diluted ethylene glycol aqueous solution through an adsorption bed, which is filled with one or more macroporous adsorption resins and an optional ion exchange resin, for an adsorption treatment so as to obtain a purified ethylene glycol aqueous solution; and then dehydrating same to obtain ethylene glycol.

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Inventors:

YUAN YI (CN)

Application Number:

PCT/CN2021/109536

Publication Date:

February 10, 2022

Filing Date:

July 30, 2021

Export Citation:

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Assignee:

CHANGCHUN MEIHE SCIENCE AND TECH DEVELOPMENT CO LTD (CN)

International Classes:

C07C29/74; C07C29/76; C07C31/20

Foreign References:

CN101928201A	2010-12-29
US4289593A	1981-09-15
CN102372598A	2012-03-14
US6242655B1	2001-06-05
US5770777A	1998-06-23
CN104496752A	2015-04-08
CN102649704A	2012-08-29
US4935102A	1990-06-19
US4966658A	1990-10-30
US5423955A	1995-06-13
US8906205B2	2014-12-09
CN106946654A	2017-07-14
CN201010200038A	2010-06-11
CN201110047173A	2011-02-25

Other References:

"Biopharmaceutical Technology", 28 February 2006, CHINA MEDICAL SCIENCE AND TECHNOLOGY PRESS, CN, ISBN: 7-5067-3364-1, article WU, WUTONG: "Chapter 6 Adsorption-based Separation Method", pages: 186 - 190, XP009534112

Attorney, Agent or Firm:

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

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