Aqueous two‐phase/reverse micelle continuous process for recycling and simultaneous purification of polar ionic liquid from enzymatic hydrolysate

Feng, Yuanyuan; Li, Qiang; Kang, Guo-Ping; Ji, Gengsheng; Tang, Yubin; Tu, Jie

doi:10.1002/jctb.4587

Cited by 13 publications

(8 citation statements)

References 23 publications

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“…[DBNH][OAc] was found to have comparably moderate extraction efficiency. However, since the IONCELL-F process for the production of high-performance cellulosic fibers is based on [DBNH[OAc], this IL was chosen in this study as the IL to combine IONCELL-P and F. Another strong reason for using this IL is that the recyclability of this IL has been already addressed and is continuously being developed in recent and ongoing studies, while several publications only speculate on the recyclability of most of the research stage ILs. − ,, …”

Section: Results and Discussionmentioning

confidence: 99%

IONCELL-P&F: Pulp Fractionation and Fiber Spinning with Ionic Liquids

Stépán

Michud

Hellstén

et al. 2016

Ind. Eng. Chem. Res.

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Both IONCELL-P(ulp) and IONCELL-F(iber) are emerging new cellulose processing technologies utilizing ionic liquids (ILs). IONCELL-P is upgrading paper pulp into dissolving pulp with mixtures of IL and water. IONCELL-F is an IL based cellulose fiber spinning technology. In this work, these two processes were combined using the same ionic liquid, 1,5-diazabicyclo[4.3.0]non-5-ene acetate [DBNH][OAc], in both processes. In the IONCELL-P to achieve dissolving pulp quality cellulose (hemicellulose content below 5%) from birch kraft pulp, different pretreatments and optimization steps, such as targeted enzymatic predegradation of the xylans, preadjusting the viscosity of the pulp, and decreased pulp consistency (2%) in the fractionation, were implemented. From the obtained cellulose fraction containing 4.2% xylan, a dope was prepared from which high tenacity (50 cN/tex) and Young’s modulus (23.6 GPa) fibers were spun with IONCELL-F dry jet wet spinning. The produced fibers surpassed the mechanical properties of commercially available viscose and Lyocell fibers.

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Section: Results and Discussionmentioning

confidence: 99%

IONCELL-P&F: Pulp Fractionation and Fiber Spinning with Ionic Liquids

Stépán

Michud

Hellstén

et al. 2016

Ind. Eng. Chem. Res.

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“…Some hurdles are yet to overcome to make ILs entering in large-scale processes [140, 141]. The separation and recovery of the IL from a mixture of carbohydrates, lignin and proteins can result in challenges for large-scale biorefineries [135, 142]. The individual lignocellulosic components, such as cellulose, can be recovered by addition of an anti-solvent, e.g.…”

Section: Pretreatment Methodsmentioning

confidence: 99%

Pretreatment for biorefineries: a review of common methods for efficient utilisation of lignocellulosic materials

Galbe

Wallberg

2019

Biotechnol Biofuels

333

195

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The implementation of biorefineries based on lignocellulosic materials as an alternative to fossil-based refineries calls for efficient methods for fractionation and recovery of the products. The focus for the biorefinery concept for utilisation of biomass has shifted, from design of more or less energy-driven biorefineries, to much more versatile facilities where chemicals and energy carriers can be produced. The sugar-based biorefinery platform requires pretreatment of lignocellulosic materials, which can be very recalcitrant, to improve further processing through enzymatic hydrolysis, and for other downstream unit operations. This review summarises the development in the field of pretreatment (and to some extent, of fractionation) of various lignocellulosic materials. The number of publications indicates that biomass pretreatment plays a very important role for the biorefinery concept to be realised in full scale. The traditional pretreatment methods, for example, steam pretreatment (explosion), organosolv and hydrothermal treatment are covered in the review. In addition, the rapidly increasing interest for chemical treatment employing ionic liquids and deep-eutectic solvents are discussed and reviewed. It can be concluded that the huge variation of lignocellulosic materials makes it difficult to find a general process design for a biorefinery. Therefore, it is difficult to define "the best pretreatment" method. In the end, this depends on the proposed application, and any recommendation of a suitable pretreatment method must be based on a thorough techno-economic evaluation.

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“…The differences in the physicochemical properties of the RMs systems can have a great impact on the kinetic parameters of chemical , and enzymatic reactions. ,− Nevertheless, to the best our knowledge, the effect of a catanionic interface on the kinetic parameters of a chemical reaction has not yet been assessed. In this work, we studied the kinetics of the reaction between dimethyl-4-nitrophenylsulfonium trifluoromethanesulfonate (S + ) and n -butylamine (BuNH 2 ) as an S N 2 model (Scheme ) to fully understand the microenvironment of the catanionic micellar interface.…”

Section: Introductionmentioning

confidence: 99%

Catanionic Reverse Micelles as an Optimal Microenvironment To Alter the Water Electron Donor Capacity in a S_N2 Reaction

et al. 2019

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The effect of interfacial water entrapped in two types of catanionic reverse micelles (RMs) on the kinetic parameters of the S N 2 reaction between dimethyl-4-nitrophenylsulfonium trifluoromethanesulfonate (S +) and n-butylamine (BuNH 2) was explored. Two catanionic surfactants, composed of a mixture of oppositely charged ionic surfactants without their original counterions, were used to create the RMs. Thus, benzyl-n-hexadecyldimethylammonium 1,4-bis(2-ethylhexyl) sulfosuccinate (BHD-AOT) and cetyltrimethylammonium 1,4-bis(2-ethylhexyl) sulfosuccinate (CTA-AOT) were formed. Also, the wellknown anionic surfactant sodium 1,4-bis(2-ethylhexyl) sulfosuccinate (Na-AOT) was employed as a comparison. Our results showed an important catalytic-like effect of all RMs investigated in comparison with a water−benzene mixture, and the rate constant values depend on the type of surfactant used. Faster reaction in BHD-AOT RMs than in CTA-AOT and Na-AOT RMs was observed. This behavior was attributed to the strong interaction (by hydrogen bonding with AOT anion and ion-dipole interaction with BHD +) between the entrapped water and the BHD-AOT interface, which reduces the solvation capacity of water on S +. In CTA-AOT (and Na-AOT) RMs, the water−interface interaction is weaker and the electron pairs of water can solvate S + ions. In summary, the chemical structure of the counterion on the catanionic surfactant alters the interfacial region, allowing the progress of a reaction inside the RMs to be controlled.

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Aqueous two‐phase/reverse micelle continuous process for recycling and simultaneous purification of polar ionic liquid from enzymatic hydrolysate

Cited by 13 publications

References 23 publications

IONCELL-P&F: Pulp Fractionation and Fiber Spinning with Ionic Liquids

IONCELL-P&F: Pulp Fractionation and Fiber Spinning with Ionic Liquids

Pretreatment for biorefineries: a review of common methods for efficient utilisation of lignocellulosic materials

Catanionic Reverse Micelles as an Optimal Microenvironment To Alter the Water Electron Donor Capacity in a S_N2 Reaction

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Aqueous two‐phase/reverse micelle continuous process for recycling and simultaneous purification of polar ionic liquid from enzymatic hydrolysate

Cited by 13 publications

References 23 publications

IONCELL-P&F: Pulp Fractionation and Fiber Spinning with Ionic Liquids

IONCELL-P&F: Pulp Fractionation and Fiber Spinning with Ionic Liquids

Pretreatment for biorefineries: a review of common methods for efficient utilisation of lignocellulosic materials

Catanionic Reverse Micelles as an Optimal Microenvironment To Alter the Water Electron Donor Capacity in a SN2 Reaction

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Catanionic Reverse Micelles as an Optimal Microenvironment To Alter the Water Electron Donor Capacity in a S_N2 Reaction