Title:
PROCESS FOR PURIFYING ORGANIC SOLVENTS
Document Type and Number:
WIPO Patent Application WO/2021/000318
Kind Code:
A1
Abstract:
A process for purifying (i) a hydrophilic organic solvent, (ii) a hydrolysable organic solvent, or (iii) a mixture of a hydrophilic organic solvent and a hydrolysable organic solvent by removing ionic contaminants from the hydrophilic organic solvent, from the hydrolysable organic solvent, or from the mixture of a hydrophilic and a hydrolysable organic solvent without generation of by-product impurities, the process including the steps of contacting the hydrophilic organic solvent, the hydrolysable organic solvent, or the mixture of hydrophilic and hydrolysable organic solvents with a mixed bed of ion exchange resin; wherein the mixed bed of ion exchange resin includes a mixture of: (a) a weak-acid cationic ion exchange resin and (b) a weak-base anionic ion exchange resin.
Inventors:
JIANG QI (CN)
OHBA KAORU (JP)
OHBA KAORU (JP)
Application Number:
PCT/CN2019/094706
Publication Date:
January 07, 2021
Filing Date:
July 04, 2019
Export Citation:
Assignee:
DOW GLOBAL TECHNOLOGIES LLC (US)
JIANG QI (CN)
OHBA KAORU (JP)
JIANG QI (CN)
OHBA KAORU (JP)
International Classes:
B01J41/07; B01J39/05; B01J39/07; B01J39/18; B01J41/12; B01J47/04; C07C67/56; C07C69/14
Domestic Patent References:
| WO2017116759A1 | 2017-07-06 | |||
| WO2017116759A1 | 2017-07-06 | |||
| WO2017116755A1 | 2017-07-06 |
Foreign References:
| US5192446A | 1993-03-09 | |||
| US5292493A | 1994-03-08 | |||
| US6569910B1 | 2003-05-27 |
Other References:
See also references of EP 3993904A4
Attorney, Agent or Firm:
WU, FENG & ZHANG (CN)
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