scholarly journals Outperformance in Acrylation: Supported D-Glucose-Based Ionic Liquid Phase on MWCNTs for Immobilized Lipase B from Candida antarctica as Catalytic System

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 3090
Author(s):  
Anna Szelwicka ◽  
Karol Erfurt ◽  
Sebastian Jurczyk ◽  
Slawomir Boncel ◽  
Anna Chrobok
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Liquid Phase ◽  
Acrylic Acid ◽  
Butyl Acrylate ◽  
Promising Result ◽  
Immobilized Lipase ◽  
Candida Antarctica ◽  
Molar Ratio ◽  
Lipase B

This study presents a highly efficient method of a synthesis of n-butyl acrylate via esterification of acrylic acid and n-butanol in the presence of supported ionic liquid phase (SILP) biocatalyst consisting of the lipase B from Candida antarctica (CALB) and multi-walled carbon nanotubes (MWCNTs) modified by D-glucose-based ionic liquids. Favorable reaction conditions (acrylic acid: n-butanol molar ratio 1:2, cyclohexane as a solvent, biocatalyst 0.150 g per 1 mmol of acrylic acid, temperature 25 °C) allowed the achievement of a 99% yield of n-butyl acrylate in 24 h. Screening of various ionic liquids showed that the most promising result was obtained if N-(6-deoxy-1-O-methoxy-α-D-glucopyranosyl)-N,N,N-trimethylammonium bis-(trifluoromethylsulfonyl)imide ([N(CH3)3GlcOCH3][N(Tf)2]) was selected in order to modify the outer surface of MWCNTs. The final SILP biocatalyst–CNTs-[N(CH3)3GlcOCH3][N(Tf)2]-CALB contained 1.8 wt.% of IL and 4.2 wt.% of CALB. Application of the SILP biocatalyst led to the enhanced activity of CALB in comparison with the biocatalyst prepared via physical adsorption of CALB onto MWCNTs (CNTs-CALB), as well as with commercially available Novozyme 435. Thus, the crucial role of IL in the stabilization of biocatalysts was clearly demonstrated. In addition, a significant stability of the developed biocatalytic system was confirmed (three runs with a yield of ester over 90%).

Supported ionic liquid phase (SILP) facilitated gas-phase enzyme catalysis – CALB catalyzed transesterification of vinyl propionate

2018 ◽  
Vol 8 (9) ◽  
pp. 2460-2466 ◽  
Author(s):  
Changhee Lee ◽  
Bernhard Sandig ◽  
Michael R. Buchmeiser ◽  
Marco Haumann
Keyword(s):  
Ionic Liquid ◽  
Liquid Phase ◽  
Gas Phase ◽  
Enzyme Catalysis ◽  
Candida Antarctica ◽  
Candida Antarctica Lipase B ◽  
Candida Antarctica Lipase ◽  
Lipase B ◽  
Supported Ionic Liquid ◽  
Vinyl Propionate

The supported ionic liquid phase (SILP) technology has been used to immobilize Candida Antarctica Lipase B (CALB) within a hybrid monolith.

scholarly journals Ionic liquids and deep eutectic solvents for the recovery of phenolic compounds: effect of ionic liquids structure and process parameters

RSC Advances ◽  
2021 ◽  
Vol 11 (20) ◽  
pp. 12398-12422
Author(s):  
Amir Sada Khan ◽  
Taleb H. Ibrahim ◽  
Nabil Abdel Jabbar ◽  
Mustafa I. Khamis ◽  
Paul Nancarrow ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Phenolic Compounds ◽  
Liquid Phase ◽  
Aqueous Phase ◽  
Process Parameters ◽  
Deep Eutectic Solvents

Extraction of phenol from aqueous phase to ionic liquid phase.

Deep Eutectic Solvents- a New Additive in the Encapsulation of Lipase B from Candida antarctica: Biocatalytic Applications

2022 ◽  
Author(s):  
Adrian-Ioan Ioan Dudu ◽  
Laszlo Csaba Bencze ◽  
Csaba Paizs ◽  
Monica Ioana Tosa
Keyword(s):  
Enzyme Activity ◽  
Ionic Liquids ◽  
Sol Gel ◽  
Deep Eutectic Solvents ◽  
Candida Antarctica ◽  
Lipase B ◽  
Hydroxy Compounds

The enzymes encapsulation in sol-gel matrix can be improved using some additive acting on enzyme activity and/or stability. Ionic liquids, poly-hydroxy compounds, sugars, etc. have been previously reported as additives....

scholarly journals Zinc Acetate Immobilized on Mesoporous Materials by Acetate Ionic Liquids as Catalysts for Vinyl Acetate Synthesis

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Hang Xu ◽  
Tianlong Yu ◽  
Mei Li
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Vinyl Acetate ◽  
Silica Gel ◽  
Catalyst Activity ◽  
Catalyst Layer ◽  
Space Velocity ◽  
Molar Ratio ◽  
Vinyl Acetate Monomer ◽  
Adsorption Desorption

Ionic liquid containing active ingredient Zn(CH3COO)2was loaded in mesoporous silica gel to form supported ionic liquids catalyst (SILC) which was used to synthesize vinyl acetate monomer (VAM). SILC was characterized by1HNMR, FT-IR, TGA, BET, and N2adsorption/desorption and the acetylene method was used to evaluate SILC catalytic activity and stability in fixed reactor. The result shows that 1-allyl-3-acetic ether imidazole acetate ionic liquid is successfully fixed within mesoporous channel of silica gel. The average thickness of ionic liquid catalyst layer is about 1.05 nm. When the catalytic temperature is 195°C, the acetic acid (HAc) conversion is 10.9% with 1.1 g vinyl acetate yield and 98% vinyl acetate (VAc) selectivity. The HAc conversion is increased by rise of catalytic temperature and molar ratio of C2H2 : HAc and decreased by mass space velocity (WHSV). The catalyst activity is not significantly reduced within 7 days and VAc selectivity has a slight decrease.

Synthesis and Characterization of Super-Molecular Ionic Liquids

2011 ◽  
Vol 197-198 ◽  
pp. 906-910
Author(s):  
Hui Ru Liu ◽  
Li Qiang Lv ◽  
Xing Chen Zhang
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Melting Point ◽  
Quantum Chemical ◽  
Organic Molecules ◽  
Raw Materials ◽  
Ammonium Thiocyanate ◽  
Molar Ratio ◽  
Molecular Ion

This study concerned a novel super-molecular ionic liquid synthesized by ammonium thiocyanate and caprolactam. The physical characters such as melting point and electric conductivity were investigated. Results showed that the melting point is -12.2°C at the molar ratio of 3:1 (caprolactam/ammonium thiocyanate), which is much lower than raw materials. The electric conductivities of synthesized ionic liquids were close to that of imidazole ILs. The structure of ionic liquid was characterized by IR,1HNMR and quantum chemical calculations. It was shown that the NH4+cation connected with caprolactam organic molecules by hydrogen bonds, leading to the forming of a super-molecular ion. The electrostatic attraction of super-molecular ion with anion was decreased because of the larger volume of super-molecular ion than original cation, thus the melting point decreased. The key properties that distinguish super-molecular ionic liquid from other ILs were the presence of supermolecular ion, which can be used to build up a hydrogen-bonded network. This type ion liquid was named as super-molecular ion liquid.

The effect of imidazolium cations on the structure and activity of the Candida antarctica Lipase B enzyme in ionic liquids

2016 ◽  
Vol 18 (32) ◽  
pp. 22062-22069 ◽  
Author(s):  
Ho Shin Kim ◽  
Doyoung Eom ◽  
Yoon-Mo Koo ◽  
Yaroslava G. Yingling
Keyword(s):  
Experimental Data ◽  
Ionic Liquids ◽  
Md Simulations ◽  
Candida Antarctica ◽  
Candida Antarctica Lipase B ◽  
Enzyme Structure ◽  
Candida Antarctica Lipase ◽  
Lipase B ◽  
Imidazolium Cations ◽  
Structure And Activity

To understand how cations affect the enzyme structure and activity of Candida antarctica Lipase B, we performed MD simulations of CALB in four types of ionic liquids with varying sizes of cations and correlated the results with the experimental data.

Preconcentration and Determination of Aromatic Amines with Temperature-Controlled Ionic Liquid Dispersive Liquid Phase Microextraction in Combination with High Performance Liquid Chromatography

2012 ◽  
Vol 95 (5) ◽  
pp. 1534-1540 ◽  
Author(s):  
Qingxiang Zhou ◽  
Yuantuan Gao ◽  
Junping Xiao ◽  
Guohong Xie
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Liquid Phase ◽  
Aromatic Amines ◽  
High Performance ◽  
Correlation Coefficients ◽  
Detection Sensitivity ◽  
Liquid Phase Microextraction ◽  
Temperature Controlled

Abstract This paper reports a new method for the determination of aromatic amines with temperature-controlled ionic liquid dispersive liquid-phase microextraction in combination with HPLC and results of investigation of the influence of anions in ionic liquids on the extraction performance. In these experiments, 1-octyl-3-methylimidazolium hexafluorophosphate ([C8MIM][PF6]), 1-octyl-3-methylimidazolium bis (trifluoromethanesulfonyl) imide ([C8MIM][NTf2]), and 1-octyl-3-methylimidazolium tetrafluoroborate ([C8MIM][BF4]) were used as the extraction solvents for the investigation of the effect of anions in ionic liquids. Other parameters affecting the microextraction performance were also investigated. Under the optimal conditions, the proposed method had good linearity over the concentration ranges of 1.0–100 μg/L for 2, 4-dimethylaniline, 2-chloroanline, and N,N-dimethylaniline, and 1.5–150 μg/L for N,N-dimethylaniline and alpha-naphthylamine, with excellent correlation coefficients (R2 ≥ 0.999), excellent detection sensitivity with LODs (S/N = 3) in the range of 0.39–0.63 μg/L, and precision in the range of 3.2–5.4% RSD (n = 6). Real water samples were analyzed with the established method, and good spike recoveries in the range of 86.3 to 98.9% were obtained. These results indicated that this method would be useful in the routine analysis of such pollutants.

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