Recovery of ionic liquids from dilute aqueous solutions by electrodialysis

Wang, Xiaoliang; Nie, Yi; Zhang, Xiangping; Zhang, Suojiang; Li, Jianwei

doi:10.1016/j.desal.2011.10.003

Cited by 78 publications

(35 citation statements)

References 17 publications

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“…Water removal through distillation is still considered to be the simplest method, but its cost in energy may be prohibitive. Other techniques are also investigated, such as electrodialysis and reverse osmosis, treatment with strong base to form a distillable carbene followed by treatment with acetic acid to reclaim the IL, and pervaporation . We are continuing to explore several options.…”

Section: Resultsmentioning

confidence: 99%

“Practical” Electrospinning of Biopolymers in Ionic Liquids

Shamshina

Zavgorodnya

Bonner³

et al. 2016

ChemSusChem

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To address the need to scale up technologies for electrospinning of biopolymers from ionic liquids to practical volumes, a setup for the multi-needle electrospinning of chitin using the ionic liquid 1-ethyl-3-methylimidazolium acetate, [C mim]-[OAc], was designed, built, and demonstrated. Materials with controllable and high surface area were prepared at the nanoscale using ionic-liquid solutions of high-molecular-weight chitin extracted with the same ionic liquid directly from shrimp shells.

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Section: Resultsmentioning

confidence: 99%

“Practical” Electrospinning of Biopolymers in Ionic Liquids

Shamshina

Zavgorodnya

Bonner³

et al. 2016

ChemSusChem

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“…This results in a loss of biomass that could be utilized and may cause a loss of pretreatment capability following repeated use. Recently, it was reported that IL could be separated and concentrated from the diluted aqueous solution by ion-exclusion chromatography [34,35] or electrodialysis with an ion-exchange membrane [36][37][38]. These separation principles are useful when IL is recovered from diluted aqueous solution containing depolymerized lignin monomer [37] or monosaccharide [34,35,38], which is likely to be generated during the IL-assisted pretreatment of lignocellulosic biomass or onepot IL-assisted pretreatment and hydrolysis of (ligno)cellulosic biomass, respectively.…”

Section: Discussionmentioning

confidence: 98%

Characterization of fractionated biomass component and recovered ionic liquid during repeated process of cholinium ionic liquid-assisted pretreatment and fractionation

Ninomiya

Inoue

Aomori

et al. 2015

Chemical Engineering Journal

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h i g h l i g h t sCholine acetate, totally bio-derived ionic liquid, was used to pretreat bagasse. The bagasse was fractionated to carbohydrate-/lignin-rich materials (CRM and LRM). Cellulose hydrolysis was 20% and 95% for original bagasse and CRM, respectively. Molecular weight of LRM was ten-times lower than that of hydrolysis residue of CRM. Choline acetate kept pretreatment capability even after five cycles of the processes. a b s t r a c tCholine acetate, a totally bio-derived ionic liquid (IL), was used for IL-assisted pretreatment and subsequent fractionation of bagasse into carbohydrate and lignin. The fractionated carbohydrate-rich material (CRM) and lignin-rich material (LRM) were 79.6% and 5.2% of the original bagasse, respectively. CRM contained nearly all carbohydrate and approximately 50% of lignin in the original bagasse. In addition, approximately 20% of lignin in the original bagasse was fractionated as LRM. The cellulose saccharification percentage was over 95% for CRM, although the value was only 20% for the original bagasse. The average molecular weight of LRM was 4.2 Â 10 4 , which was approximately ten-times lower than that of the hydrolysis residue of CRM. After five cycles of the processes, the recovery of choline acetate was 80% of the fresh one. Throughout the five cycles, choline acetate maintained its chemical structure and exhibited its pretreatment capability for fractionation and enzymatic hydrolysis of bagasse.

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“…Membrane processes are classified according to driving forces [1]. Electrodialysis (ED) is one of the most common membrane separation techniques that uses the electrical potential difference as the driving force [2,3]. The performance of the ED process has greatly affected the characteristics of the used ion exchange membranes.…”

Section: Introductionmentioning

confidence: 99%

Removal of hardness by electrodialysis using homogeneous and heterogeneous ion exchange membranes

Karabacakoğlu

Tezakıl²,

Güvenç

2014

Desalination and Water Treatment

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A B S T R A C TThe effect of membrane characteristics on removal of hardness ions from its dilute solutions using electrodialysis (ED) system by applying batch recirculation mode has been investigated. Two types of membrane pairs were used. Type I: Ionac MC3470 and MA3475 (Sybron Chem. Co.); Type II: Neosepta CMX and Neosepta AMX (Astom Corp.). These membranes have different ionic permselectivity, electrical resistance and thickness. In the first part of the study, the effects of the feed concentration, dilute flow rate and dilute pH on the hardness removal were investigated using Type I membranes. The optimum values for feed concentration, flow rate and pH were determined as 0.01 M, 2.6 mL/ s and 6.8, respectively. In the second part, the experiments were conducted at different voltage values using Type II membranes under the optimum conditions of these variables obtained. The 95% removal of Mg 2+ with the energy consumption of 2.07 kWh/mol and 93% removal of Ca 2+ with the energy consumption of 2.12 kWh/mol were obtained in 200 min, applying 20 V potential using Type I membranes. On the other hand, the 100% removal of Mg 2+ was achieved by the energy consumption of 1.69 kWh/mol in only 60 min. and the removal of Ca 2+ was 98.3% with the energy consumption of 3.39 kWh/mol in 170 min. applying 20 V and using Type II membranes. The results obtained from this study showed that the membrane characteristics affect the efficiency of the ED significantly.

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Recovery of ionic liquids from dilute aqueous solutions by electrodialysis

Cited by 78 publications

References 17 publications

“Practical” Electrospinning of Biopolymers in Ionic Liquids

“Practical” Electrospinning of Biopolymers in Ionic Liquids

Characterization of fractionated biomass component and recovered ionic liquid during repeated process of cholinium ionic liquid-assisted pretreatment and fractionation

Removal of hardness by electrodialysis using homogeneous and heterogeneous ion exchange membranes

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