Title:
METHOD FOR RECOVERING CATION COMPONENT OF IONIC LIQUID AND METHOD FOR REGENERATING IONIC LIQUID
Document Type and Number:
WIPO Patent Application WO/2023/032483
Kind Code:
A1
Abstract:
A method for recovering a cation component of a neutralized-salt type ionic liquid, characterized by comprising a first step, in which an aqueous solution of the neutralized-salt type ionic liquid is mixed with a water-incompatible organic solvent to prepare a liquid separating into two layers, i.e., an aqueous layer and an organic layer, a second step, in which the liquid separating into two layers is mixed with a water-soluble strong alkali so that the amount of the strong alkali is 20% by mass or larger with respect to the water contained in the aqueous layer, thereby regenerating the cations of the neutralized-salt type ionic liquid present in the aqueous layer, into a neutral substance and moving the neutral substance from the aqueous layer to the organic layer, and a third step, in which the organic layer containing the neutral substance is recovered by a liquid-separating operation. By this method, the cation component of an expensive ionic liquid can be easily recovered at low cost as compared with conventional methods.
Inventors:
MASUDA GEN (JP)
Application Number:
PCT/JP2022/027789
Publication Date:
March 09, 2023
Filing Date:
July 15, 2022
Export Citation:
Assignee:
NISSHINBO HOLDINGS INC (JP)
International Classes:
C07D487/04; B01D11/02; C07C17/35
Domestic Patent References:
| WO2008043837A1 | 2008-04-17 |
Other References:
HANABUSA HIDEKI, IZGORODINA EKATERINA I., SUZUKI SHIORI, TAKEOKA YUKO, RIKUKAWA MASAHIRO, YOSHIZAWA-FUJITA MASAHIRO: "Cellulose-dissolving protic ionic liquids as low cost catalysts for direct transesterification reactions of cellulose", GREEN CHEMISTRY, vol. 20, no. 6, 1 January 2018 (2018-01-01), GB , pages 1412 - 1422, XP093041392, ISSN: 1463-9262, DOI: 10.1039/C7GC03603E
DIBBLE DEAN C., LI CHENLIN, SUN LAN, GEORGE ANTHE, CHENG AURELIA, ÇETINKOL ÖZGÜL PERSIL, BENKE PETER, HOLMES BRADLEY M., SINGH SEE: "A facile method for the recovery of ionic liquid and lignin from biomass pretreatment", GREEN CHEMISTRY, vol. 13, no. 11, 1 January 2011 (2011-01-01), GB , pages 3255 - 3264, XP093041404, ISSN: 1463-9262, DOI: 10.1039/c1gc15111h
ELSAYED SHERIF; HELLSTEN SANNA; GUIZANI CHAMSEDDINE; WITOS JOANNA; RISSANEN MARJA; RANTAMÄKI ANTTI H; VARIS PAULIINA; WIEDMER SUSA: "Recycling of Superbase-Based Ionic Liquid Solvents for the Production of Textile-Grade Regenerated Cellulose Fibers in the Lyocell Process", ACS SUSTAINABLE CHEMISTRY & ENGINEERING, vol. 8, no. 37, 21 September 2020 (2020-09-21), US , pages 14217 - 14227, XP055826448, ISSN: 2168-0485, DOI: 10.1021/acssuschemeng.0c05330
RCS ADVANCE, vol. 5, 2015, pages 69728
"Ionic liquids-The Front and Future of Material Development", 2003, CMC PUBLISHING CO., LTD., pages: 19 - 21
DIBBLE DEAN C., LI CHENLIN, SUN LAN, GEORGE ANTHE, CHENG AURELIA, ÇETINKOL ÖZGÜL PERSIL, BENKE PETER, HOLMES BRADLEY M., SINGH SEE: "A facile method for the recovery of ionic liquid and lignin from biomass pretreatment", GREEN CHEMISTRY, vol. 13, no. 11, 1 January 2011 (2011-01-01), GB , pages 3255 - 3264, XP093041404, ISSN: 1463-9262, DOI: 10.1039/c1gc15111h
ELSAYED SHERIF; HELLSTEN SANNA; GUIZANI CHAMSEDDINE; WITOS JOANNA; RISSANEN MARJA; RANTAMÄKI ANTTI H; VARIS PAULIINA; WIEDMER SUSA: "Recycling of Superbase-Based Ionic Liquid Solvents for the Production of Textile-Grade Regenerated Cellulose Fibers in the Lyocell Process", ACS SUSTAINABLE CHEMISTRY & ENGINEERING, vol. 8, no. 37, 21 September 2020 (2020-09-21), US , pages 14217 - 14227, XP055826448, ISSN: 2168-0485, DOI: 10.1021/acssuschemeng.0c05330
RCS ADVANCE, vol. 5, 2015, pages 69728
"Ionic liquids-The Front and Future of Material Development", 2003, CMC PUBLISHING CO., LTD., pages: 19 - 21
Attorney, Agent or Firm:
PATENT PROFESSIONAL CORPORATION EI-MEI PATENT OFFICE (JP)
Download PDF:
Previous Patent: NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY
Next Patent: IMAGING SYSTEM, IMAGING TERMINAL, AND SERVER
Next Patent: IMAGING SYSTEM, IMAGING TERMINAL, AND SERVER