Alcoholysis of polyethylene terephthalate to produce dioctyl terephthalate using choline chloride-based deep eutectic solvents as efficient catalysts

2019 ◽  
Vol 21 (4) ◽  
pp. 897-906 ◽  
Author(s):  
Lei Zhou ◽  
Xingmei Lu ◽  
Zhaoyang Ju ◽  
Bo Liu ◽  
Haoyu Yao ◽  
...  
Keyword(s):  
Polyethylene Terephthalate ◽  
Choline Chloride ◽  
Deep Eutectic Solvents ◽  
Raw Material

To prepare DOTP more cheaply and efficiently, PET was used as a raw material and a ChCl-based DES was synthesized as a catalyst.

scholarly journals Extraction of Illegal Dyes from Red Chili Peppers with Cholinium-Based Deep Eutectic Solvents

2017 ◽  
Vol 2017 ◽  
pp. 1-6 ◽  
Author(s):  
Shuqiang Zhu ◽  
Dongling Liu ◽  
Xinyue Zhu ◽  
Along Su ◽  
Haixia Zhang
Keyword(s):  
Choline Chloride ◽  
Deep Eutectic Solvents ◽  
Raw Material ◽  
Extraction Time ◽  
Solvent Ratio ◽  
Extraction Temperature ◽  
Green Solvents ◽  
Hydrogen Bond Donor ◽  
Relative Standard ◽  
Orange G

Deep eutectic solvents (DESs) as a new kind of green solvents have been used to extract bioactive compounds but there are few applications in extracting chrysoidine dyes. In this study, we developed an ultrasonic-assisted extraction method with choline chloride/hydrogen bond donor (ChCl/HBD) DES for the extraction of chrysoidine G (COG), astrazon orange G (AOG), and astrazon orange R (AOR) in food samples. Some experimental parameters, such as extraction time, raw material/solvent ratio, and temperature, were evaluated and optimized as follows: the ratio of ChCl/HBD, 1 : 2 (v/v); the ratio of sample/DES, 1 : 10 (g/mL); extraction time, 20 min; extraction temperature, 50°C. Under the optimized conditions, the limits of detection (μg/mL) were 0.10 for COG and 0.06 for AOG and AOR. The relative standard deviations were in the range of 1.2–2.1%. The recoveries of the three dyes were in the range of 80.2–105.0%. By comparing with other commonly used solvents for extracting chrysoidine dyes, the advantages of DESs proved them to be potential extraction solvents for chrysoidine G, astrazon orange G, and astrazon orange R in foods.

scholarly journals EXTRACTION OF LIGNIN FROM SUGARCANE BAGASSE BY DEEP EUTECTIC SOLVENTS (DESs)

2019 ◽  
Vol 57 (3A) ◽  
pp. 134
Author(s):  
Bui Thi Thao Nguyen ◽  
Nguyen Nhi Tru ◽  
Thai Ngoc Minh Hoang ◽  
Nguyen Hoang Duong ◽  
Tran Manh Cuong
Keyword(s):  
Sugarcane Bagasse ◽  
Choline Chloride ◽  
Gel Permeation Chromatography ◽  
Renewable Resource ◽  
Deep Eutectic Solvents ◽  
Raw Material ◽  
Proton Nuclear Magnetic Resonance ◽  
Plant Cell Walls ◽  
Average Molecular Mass ◽  
Ft Ir

Lignin plays a crucial role as a structural material of plant cell walls and is also known as a significant renewable resource that has the potential to be a raw material for producing high value chemicals. The article aimed to research on the extraction of lignin from sugarcane bagasse by environmental method using deep eutectic solvents (DESs) containing choline chloride and formic acid. In the process, lignins dissolved in DESs were isolated from the solution by dilution with water and ethanol. The obtained lignin samples were characterized with UV - Vis (Ultraviolet – visible spectroscopy), FT-IR (Fourier-transform infrared spectroscopy), GPC (Gel permeation chromatography), and 1H-NMR (Proton nuclear magnetic resonance). The initial results showed that the extracted lignin obtained adequately distinct functional groups and the weight average molecular mass of the lignin was about 28265 g/mol.

Utilization of air-plasma treated waste polyethylene terephthalate particles as a raw material for particleboard production

2016 ◽  
Vol 90 ◽  
pp. 188-194 ◽  
Author(s):  
Petr Klímek ◽  
Tomáš Morávek ◽  
Jozef Ráhel ◽  
Monika Stupavská ◽  
David Děcký ◽  
...  
Keyword(s):  
Polyethylene Terephthalate ◽  
Raw Material ◽  
Air Plasma ◽  
Waste Polyethylene

Self-assembled luminescent cholate gels induced by a europium ion in deep eutectic solvents

Soft Matter ◽  
2021 ◽  
Author(s):  
Meng Sun ◽  
Qintang Li ◽  
Xiao Chen
Keyword(s):  
Self Assembly ◽  
Choline Chloride ◽  
Deep Eutectic Solvents ◽  
Sodium Cholate ◽  
The Self ◽  
Europium Ion ◽  
Self Assembled

Luminescent gels have been successfully fabricated through the self-assembly of sodium cholate and a europium ion in choline chloride-based deep eutectic solvents.

Toxico-metabolomics study of a deep eutectic solvent comprising choline chloride and urea suggests in vivo toxicity involving oxidative stress and ammonia stress

2021 ◽  
Vol 23 (3) ◽  
pp. 1300-1311 ◽  
Author(s):  
Dasom Jung ◽  
Jae Back Jung ◽  
Seulgi Kang ◽  
Ke Li ◽  
Inseon Hwang ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Deep Eutectic Solvents ◽  
In Vivo Toxicity ◽  
Metabolomics Study ◽  
Ammonia Stress

The in vitro and in vivo studies suggest that choline chloride-based deep eutectic solvents may not be considered as pure, safe mixtures even if they consist of safe compounds.

scholarly journals Deep Eutectic Solvents Based Choline Chloride for Enzymatic Biodiesel Production from Degumming Palm Oil

2020 ◽  
Vol 32 (4) ◽  
pp. 733-738 ◽  
Author(s):  
R. Manurung ◽  
Taslim ◽  
A.G.A. Siregar
Keyword(s):  
Palm Oil ◽  
Raw Materials ◽  
Choline Chloride ◽  
Deep Eutectic Solvent ◽  
Deep Eutectic Solvents ◽  
Biodiesel Production ◽  
Chloride Salt ◽  
Enzymatic Reactions ◽  
Potential Applications ◽  
Palm Oil Biodiesel

Deep eutectic solvents (DESs) have numerous potential applications as cosolvents. In this study, use of DES as organic solvents for enzymatic biodiesel production from degumming palm oil (DPO) was investigated. Deep eutectic solvent was synthesized using choline chloride salt (ChCl) compounds with glycerol and 1,2-propanediol. Deep eutectic solvent was characterized by viscosity, density, pH and freezing values, which were tested for effectiveness by enzymatic reactions for the production of palm biodiesel with raw materials DPO. Deep eutectic solvent of ChCl and glycerol produced the highest biodiesel yield (98.98%); weight of DES was only 0.5 % of that of the oil. In addition, the use of DES maintained the activity and stability of novozym enzymes, which was assessed as the yield until the 6th usage, which was 95.07 % biodiesel yield compared with the yield without using DES. Hence, using DES, glycerol in enzymatic biodiesel production had high potentiality as an organic solvent for palm oil biodiesel production

Absorptive Separation of HCl Gas by Choline Chloride-Based Deep Eutectic Solvents

2021 ◽  
pp. 116928
Author(s):  
Jie Zhu ◽  
Hui Shao ◽  
Lin Feng ◽  
Yingzhou Lu ◽  
Hong Meng ◽  
...  
Keyword(s):  
Choline Chloride ◽  
Deep Eutectic Solvents ◽  
Hcl Gas

Green Synthesis of 2-thioxothiazolidin-4-one Derivatives in Deep Eutectic Solvents via Knoevenagel Condensation

2022 ◽  
Vol 19 ◽  
Author(s):  
Melita Lončarić ◽  
MAJA MOLNAR
Keyword(s):  
Chemical Synthesis ◽  
Green Synthesis ◽  
Environmental Pollution ◽  
Knoevenagel Condensation ◽  
Choline Chloride ◽  
Deep Eutectic Solvents ◽  
Model Reaction ◽  
Methods And Techniques ◽  
New Generation ◽  
Toxic Organic Solvents

Abstract: Recently, more and more researchers are resorting to green methods and techniques to avoid environmental pollution. Accordingly, many researchers have been working on the development of new green synthetic procedures trying to avoid the use of toxic organic solvents. A sustainable concept of green and environmentally friendly solvents in chemical synthesis nowadays encompasses a relatively new generation of solvents called deep eutectic solvents (DESs). DESs often have a dual role in the synthesis, acting as both, solvents and catalysts. In this study, DESs are used in the Knoevenagel synthesis of rhodanine derivatives, with no addition of conventional catalysts. A model reaction of rhodanine and salicylaldehyde was performed in 20 different DESs at 80 °C, in order to find the best solvent, which was further used for the synthesis of the series of desired compounds. A series of rhodanines was synthesized in choline chloride: acetamide (ChCl:acetamide) DES with good to excellent yields (51.4 – 99.7 %).

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