TY - JOUR
T1 - Liquification of 2,2,4-trimethyl-1,3-pentanediol into hydrophobic eutectic mixtures
T2 - A multi-criteria design for eco-efficient boron recovery
AU - Almustafa, Ghaiath
AU - Darwish, Ahmad S.
AU - Lemaoui, Tarek
AU - O'Conner, Matthew J.
AU - Amin, Shady
AU - Arafat, Hassan A.
AU - AlNashef, Inas
N1 - Funding Information:
The authors are thankful for Dr. Luca Desidery and Dr. Michele Lanotte for conducting the DSC tests, and for Dr. Maguy Abi Jaoude for the helpful discussion. The authors gratefully acknowledge the support from Khalifa University through research grant number CIRA-2018-69 . The authors also acknowledge the support of the Center for Membrane and Advanced Water Technology at Khalifa University , under grant number RC2-2018-009 .
Publisher Copyright:
© 2021 Elsevier B.V.
PY - 2021/12/15
Y1 - 2021/12/15
N2 - New genres of ionic liquids and deep eutectic solvents (DES) have recently emerged as eco-efficient “designer's solvents”. Herein, we report the liquification of the water soluble diol 2,2,4-trimehtyl-1,3-pentanediol (TMPD) into a novel hydrophobic DES with thymol or menthol, where the intrinsic supercooling properties of the constituents yielded eutectic mixtures with a wide liquid window and superior capabilities for boron extraction. The design framework of the TMPD-based DESs considered multiple criteria in which the trade-offs between the solvents’ properties, its boron extraction efficiency and leachability to the aqueous phase were thoroughly mapped. Formation of stable TMPD-boric acid complexes provided exceptional selectivity towards boron extraction from a synthetic brine solution. The performance of TMPD-based DESs was verified over various extraction parameters, with a single-stage extraction efficiency of ~ 98%, sustained stability over a wide pH range (2 – 8) and reusability over multiple regeneration cycle. This remarkable performance of the newly developed DESs associate the role of the TMPD as both a DES constituent and an active boron extractant, which disregards the use of hazardous organic diluents.
AB - New genres of ionic liquids and deep eutectic solvents (DES) have recently emerged as eco-efficient “designer's solvents”. Herein, we report the liquification of the water soluble diol 2,2,4-trimehtyl-1,3-pentanediol (TMPD) into a novel hydrophobic DES with thymol or menthol, where the intrinsic supercooling properties of the constituents yielded eutectic mixtures with a wide liquid window and superior capabilities for boron extraction. The design framework of the TMPD-based DESs considered multiple criteria in which the trade-offs between the solvents’ properties, its boron extraction efficiency and leachability to the aqueous phase were thoroughly mapped. Formation of stable TMPD-boric acid complexes provided exceptional selectivity towards boron extraction from a synthetic brine solution. The performance of TMPD-based DESs was verified over various extraction parameters, with a single-stage extraction efficiency of ~ 98%, sustained stability over a wide pH range (2 – 8) and reusability over multiple regeneration cycle. This remarkable performance of the newly developed DESs associate the role of the TMPD as both a DES constituent and an active boron extractant, which disregards the use of hazardous organic diluents.
KW - 2,2,4-Trimethyl-1,3-pentanediol
KW - Boron
KW - Hydrophobic deep eutectic solvents
KW - Supercooling
KW - Thymol, Menthol
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U2 - 10.1016/j.cej.2021.131342
DO - 10.1016/j.cej.2021.131342
M3 - Article
AN - SCOPUS:85110583843
SN - 1385-8947
VL - 426
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 131342
ER -