Room temperature dissolving cellulose with a metal salt hydrate-based deep eutectic solvent

Tong, Zhihan; Meng, Juan; Shi, Lei; Liu, Yongzhuang; Zeng, Suqing; Wang, Lei; Xia, Qinqin; Yu, Haipeng

doi:10.1016/j.carbpol.2021.118473

Cited by 54 publications

(25 citation statements)

References 39 publications

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“…28,29 Among them, choline chloride was often used to produce DESs because of its excellent biocompatibility, Brønsted acidic characteristics (which can provide Brønsted acid center site for the acid catalyzed reaction), and thermal stability. 30,31 DESs have recently attracted increasing interest particularly in a wide variety of green chemistry, 32−34 including separation, 35 material chemistry, 36 electrochemistry, 37 chemical catalysis, 38 biocatalysis, 39 main-group organometallic chemistry, 40 and solubility, 41,42 especially in organic synthesis. 43 As a new green solvent, DESs show good application prospects as reaction media or catalysts in organic synthesis.…”

Section: ■ Introductionmentioning

confidence: 99%

“…DESs have recently attracted increasing interest particularly in a wide variety of green chemistry, − including separation, material chemistry, electrochemistry, chemical catalysis, biocatalysis, main-group organometallic chemistry, and solubility, , especially in organic synthesis . As a new green solvent, DESs show good application prospects as reaction media or catalysts in organic synthesis.…”

Section: Introductionmentioning

confidence: 99%

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Reusable Deep Eutectic Solvents for Clean ε-Caprolactam Synthesis under Mild Conditions

Sun

Liu

Fang

et al. 2022

ACS Sustainable Chem. Eng.

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A deep eutectic solvent (DES) with adjustable Brønsted acidity was prepared easily by choline chloride (ChCl) and trifluoromethanesulfonic acid (TfOH). The obtained DES [ChCl][TfOH] 3 exhibited great stability and excellent catalytic performance in the Beckmann rearrangement reaction as solvent and catalyst. High cyclohexanone oxime (CHO) conversion (100%) and ε-caprolactam selectivity (98.8%) were obtained under mild conditions, such as DESs 0.03 mol, CHO 0.01 mol, 100 °C for 2 h. DES [ChCl][TfOH] 3 was easily prepared, recovered, and reused simply for seven runs without noticeable loss of catalytic performance. The free energy (ΔG) and activation energy (E a ) of the reaction were −32.8 and 39.82 kJ mol −1 , respectively. And, DFT results showed that the intermolecular hydrogen bond between ChCl and TfOH improved the thermal stability of DES (the six-membered ring structure formed containing Cl and N atoms) and provided a good sponge effect for the active hydrogen catalytic center required for the reaction (the hydrogen bond formed by Cl and hydroxyl). This process offered several advantages including good yields, short reaction times, and easy catalyst recoveries and makes the DES catalytic system a potentially practical procedure for Beckmann rearrangement.

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Section: ■ Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Reusable Deep Eutectic Solvents for Clean ε-Caprolactam Synthesis under Mild Conditions

Sun

Liu

Fang

et al. 2022

ACS Sustainable Chem. Eng.

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“…[160] Ambient temperature dissolution of cellulose, an energysaving process, is also feasible in a DES composed of zinc chloride, water, and phosphoric acid through the exceptional hydrogen bonding acidity and basicity that enables the cleavage of the hydrogen bonds in the cellulose backbone. [161]…”

Section: Cellulose Dissolutionmentioning

confidence: 99%

Enabling Sustainable Chemistry with Ionic Liquids and Deep Eutectic Solvents: A Fad or the Future?

et al. 2022

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Ionic liquids (ILs) and deep eutectic solvents (DESs) debuted with a promise of a superior sustainability footprint due to their low vapor pressure. However, their toxicity and high cost compromise this footprint, impeding their real‐world applications. Fortunately, their property tunability through a rational selection of precursors, including bioderived ones, provides a strategy to ameliorate toxicity, lower cost, and endow new functions. This Review discusses whether ILs and DESs are sustainable solvents and how they contribute to sustainable chemical processes.

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“…In recent years, DESs have emerged as green solvents for lignocellulose treatment. [18][19][20][21] The studies of DES treatment for lignocellulose refinery are summarized in ESI Table 1. † While most of these DES processing studies have focused on carbohydrates or lignin valorization, the total refinery of lignocellulose was rarely investigated.…”

Section: Introductionmentioning

confidence: 99%

Tailored one-pot lignocellulose fractionation to maximize biorefinery toward versatile xylochemicals and nanomaterials

Cheng

et al. 2022

Green Chem.

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Room temperature dissolving cellulose with a metal salt hydrate-based deep eutectic solvent

Cited by 54 publications

References 39 publications

Reusable Deep Eutectic Solvents for Clean ε-Caprolactam Synthesis under Mild Conditions

Reusable Deep Eutectic Solvents for Clean ε-Caprolactam Synthesis under Mild Conditions

Enabling Sustainable Chemistry with Ionic Liquids and Deep Eutectic Solvents: A Fad or the Future?

Tailored one-pot lignocellulose fractionation to maximize biorefinery toward versatile xylochemicals and nanomaterials

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