scholarly journals Correction: Catalytic conversion of biomass derivatives to lactic acid with increased selectivity in an aqueous tin(ii) chloride/choline chloride system

2018 ◽  
Vol 20 (18) ◽  
pp. 4378-4378
Author(s):  
Asep Bayu ◽  
Akihiro Yoshida ◽  
Surachai Karnjanakom ◽  
Katsuki Kusakabe ◽  
Xiaogang Hao ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Choline Chloride ◽  
Catalytic Conversion ◽  
Chloride System ◽  
System P

Correction for ‘Catalytic conversion of biomass derivatives to lactic acid with increased selectivity in an aqueous tin(ii) chloride/choline chloride system’ by Asep Bayu et al., Green Chem., 2018, DOI: 10.1039/c8gc01022f.

Catalytic conversion of biomass derivatives to lactic acid with increased selectivity in an aqueous tin(ii) chloride/choline chloride system

2018 ◽  
Vol 20 (17) ◽  
pp. 4112-4119 ◽  
Author(s):  
Asep Bayu ◽  
Akihiro Yoshida ◽  
Surachai Karnjanakom ◽  
Katsuki Kusakabe ◽  
Xiaogang Hao ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Lactic Acid ◽  
Aqueous Phase ◽  
Choline Chloride ◽  
Reaction System ◽  
Catalytic Conversion ◽  
Phase Reaction ◽  
Chloride System ◽  
System P

The catalytic activity and selectivity of SnCl2 for the conversion of biomass derivatives into LacA in the aqueous phase reaction system was found to be increased by the addition of choline chloride.

scholarly journals Esterification of Lignin Isolated by Deep Eutectic Solvent Using Fatty Acid Chloride, and Its Composite Film with Poly(lactic acid)

Polymers ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 2149
Author(s):  
Chan-Woo Park ◽  
Song-Yi Han ◽  
Rajkumar Bandi ◽  
Ramakrishna Dadigala ◽  
Eun-Ah Lee ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Fatty Acid ◽  
Composite Film ◽  
Acid Chloride ◽  
Pinus Densiflora ◽  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Morphological Characteristics ◽  
Poly Lactic Acid ◽  
Fatty Acid Chloride

In this study, the effect of lignin esterification with fatty acid chloride on the properties of lignin and lignin/poly(lactic acid) (PLA) composites was investigated. Lignocellulose (Pinus densiflora S. et Z.) was treated using a deep eutectic solvent (DES) with choline chloride (ChCl)/lactic acid (LA). From the DES-soluble fraction, DES-lignin (DL) was isolated by a regeneration process. Lignin esterification was conducted with palmitoyl chloride (PC). As the PC loading increased for DL esterification, the Mw of esterified DL (EDL) was increased, and the glass transition temperature (Tg) was decreased. In DL or EDL/PLA composite films, it was observed that EDL/PLA had cleaner and smoother morphological characteristics than DL/PLA. The addition of DL or EDL in a PLA matrix resulted in a deterioration of tensile properties as compared with neat PLA. The EDL/PLA composite film had a higher tensile strength and elastic modulus than the DL/PLA composite film. DL esterification decreased water absorption with lower water diffusion coefficients. The effect of lignin esterification on improving the compatibility of lignin and PLA was demonstrated. These results are expected to contribute to the development of high-strength lignin composites.

Deep eutectic solvent delignification: Impact of initial lignin

BioResources ◽  
2017 ◽  
Vol 12 (4) ◽  
pp. 7301-7310
Author(s):  
Veronika Majová ◽  
Silvia Horanová ◽  
Andrea Škulcová ◽  
Jozef Šima ◽  
Michal Jablonský
Keyword(s):  
Lactic Acid ◽  
Oxalic Acid ◽  
Lignin Content ◽  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Deep Eutectic Solvents ◽  
Kappa Number ◽  
Kraft Pulps ◽  
Oxygen Delignification ◽  
Detailed Understanding

This study aimed to resolve the issue of the lack of detailed understanding of the effect of initial lignin content in hardwood kraft pulps on pulp delignification by deep eutectic solvents. The authors used Kappa number of the concerned pulp, intrinsic viscosity, and selectivity and efficiency of delignification as the parameters of the effect. The pulp (50 g oven dry pulp) was treated with four different DESs systems based on choline chloride with lactic acid (1:9), oxalic acid (1:1), malic acid (1:1), and system alanine:lactic acid (1:9); the results were compared to those reached by oxygen delignification. The results showed that the pulp with a higher initial lignin content had a greater fraction of easily removed lignin fragments.

scholarly journals Catalytic Conversion of Empty Fruit Bunch (EFB) Fibres into Lactic Acid by Lead (II) ions

BioResources ◽  
2016 ◽  
Vol 11 (1) ◽  
Author(s):  
Siew Xian Chin ◽  
Siti Masrinda Tasirin ◽  
Chi Hoong Chan ◽  
Chin Hua Chia ◽  
Soon Wei Chook ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Catalytic Conversion ◽  
Empty Fruit Bunch

scholarly journals Hydrothermal Catalytic Conversion of Glucose into Lactic Acid with Acidic MIL-101(Fe)

2020 ◽  
Vol 2020 ◽  
pp. 1-7
Author(s):  
Xiaofang Liu ◽  
Zhigang Liu ◽  
Qiuyun Zhang ◽  
Hongguo Wu ◽  
Rui Wang
Keyword(s):  
Catalytic Activity ◽  
Lactic Acid ◽  
Reaction Time ◽  
Specific Surface ◽  
Catalytic Conversion ◽  
Temperature Reaction ◽  
Reaction Parameters ◽  
Acid Properties ◽  
Catalyst Reusability ◽  
First Time

MIL-101(Fe) was explored for the first time for the catalytic conversion of glucose into lactic acid (LA). The as-synthesized MIL-101(Fe) was successfully characterized, and its higher specific surface area, porosity, and feasible acid properties were confirmed to determine the remarkable catalytic activity in glucose-to-LA conversion (up to 25.4% yield) compared with other catalysts like MIL-101(Cr, Al) and UiO-66(Zr). The reaction parameters including temperature, reaction time, and substrate species as well as catalyst reusability were discussed.

scholarly journals Silica Gel Impregnated by Deep Eutectic Solvents for Adsorptive Removal of BTEX from Gas Streams

Materials ◽  
2020 ◽  
Vol 13 (8) ◽  
pp. 1894 ◽  
Author(s):  
Patrycja Makoś ◽  
Edyta Słupek ◽  
Aleksandra Małachowska
Keyword(s):  
Lactic Acid ◽  
Silica Gel ◽  
Choline Chloride ◽  
Specific Interaction ◽  
Chemical Properties ◽  
Deep Eutectic Solvents ◽  
Molar Ratio ◽  
Gas Streams ◽  
Tetrapropylammonium Bromide ◽  
Sorbent Materials

The paper presents the preparation of new adsorbents based on silica gel (SiO2) impregnated with deep eutectic solvents (DESs) to increase benzene, toluene, ethylbenzene, and p-xylene (BTEX) adsorption efficiency from gas streams. The DESs were synthesized by means of choline chloride, tetrapropylammonium bromide, levulinic acid, lactic acid, and phenol. The physico-chemical properties of new sorbent materials, including surface morphology and structures, as well as porosity, were studied by means of thermogravimetric analysis, Fourier transform infrared spectroscopy, scanning electron microscopy, X-ray diffraction, and Brunauer–Emmett–Teller analysis. The effect of DESs type, flow rate, and initial concentration of BTEX were also investigated followed by regeneration and reusability of adsorbents. The results indicate that SiO2 impregnated with tetrapropylammonium bromide and lactic acid in a 1:2 molar ratio have great potential for the removal of BTEX from gas streams. Its adsorption capacity was higher than the pure SiO2 and other developed SiO2-DES adsorbents. This result can be explained by the specific interaction between DESs and BTEX, i.e., hydrogen bonds interaction.

scholarly journals Impact of Eutectic Solvents Utilization in the Microwave Assisted Extraction of Proanthocyanidins from Grape Pomace

Molecules ◽  
2021 ◽  
Vol 27 (1) ◽  
pp. 246
Author(s):  
Rodrigo T. Neto ◽  
Sónia A. O. Santos ◽  
Joana Oliveira ◽  
Armando J. D. Silvestre
Keyword(s):  
Lactic Acid ◽  
Choline Chloride ◽  
Extraction Yield ◽  
Degree Of Polymerization ◽  
Grape Pomace ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Effective Combination ◽  
The Mean

The extraction of proanthocyanidins (PACs), despite being an important and limiting aspect of their industrial application, is still largely unexplored. Herein, the possibility of combining eutectic solvents (ESs) with microwave assisted extraction (MAE) in the extraction of PACs from grape pomace (GP) is explored, aiming to improve not only the extraction yield but also the mean degree of polymerization (mDP). The combination of choline chloride with lactic acid was shown to be the most effective combination for PACs extraction yield (135 mgPAC/gGP) and, despite the occurrence of some depolymerization, also enabled us to achieve the highest mDP (7.13). Additionally, the combination with MAE enabled the process to be completed in 3.56 min, resulting in a considerably reduced extraction time.

scholarly journals Delignification of unbleached pulp by ternary deep eutectic solvents

2021 ◽  
Vol 10 (1) ◽  
pp. 666-676
Author(s):  
Veronika Majová ◽  
Michal Jablonský ◽  
Marek Lelovský
Keyword(s):  
Hydrogen Bond ◽  
Lactic Acid ◽  
Lignin Content ◽  
Choline Chloride ◽  
Deep Eutectic Solvents ◽  
Kappa Number ◽  
Molar Ratios ◽  
The Individual ◽  
Low Solubility ◽  
Unbleached Pulp

Abstract The processing of lignocellulosic materials is very limited because of their low solubility in water and some organic solvents. Fifteen ternary deep eutectic solvents (DESs) were prepared and tested as solvents suitable for delignification of unbleached pulp. The selected ternary DESs are composed of quaternary ammonium salts and amino acids as hydrogen-bond acceptors, and organic acids and polyvalent alcohols as hydrogen bond donors, with molar ratios varying for the individual components. The delignification efficiency is significantly influenced by the degree of penetration of the solvent into the pulp fibre structure. Therefore, the density and viscosity analysis of individual solvents was performed. Unbleached beech pulp with initial kappa number 13.9 was treated with the prepared DESs. The kappa number indicates the residual lignin content or the bleachability of pulp. The efficiency of the solvents ranged from 1.4% to 28.1%. The most suitable for the pretreatment of fibres, based on lignin removal efficiency, were found to be three DESs, in the following order: malonic acid/choline chloride/1,3-propanediol (1:1:3) > choline chloride/acetamide/lactic acid (1:2:3) > choline chloride/urea/lactic acid (1:2:3).

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