scholarly journals Brønsted acidic ionic liquids for cellulose hydrolysis in an aqueous medium: structural effects on acidity and glucose yield

RSC Advances ◽  
2018 ◽  
Vol 8 (26) ◽  
pp. 14623-14632 ◽  
Author(s):  
Shiori Suzuki ◽  
Yuko Takeoka ◽  
Masahiro Rikukawa ◽  
Masahiro Yoshizawa-Fujita
Keyword(s):  
Catalytic Activity ◽  
Ionic Liquids ◽  
Microwave Irradiation ◽  
Theoretical Calculations ◽  
Cellulose Hydrolysis ◽  
Acidity Function ◽  
Structural Effects ◽  
Glucose Yield ◽  
Acidic Ionic Liquids ◽  
Hammett Acidity Function

Using Brønsted acidic ionic liquids with various structures, their acidic catalytic activity for cellulose hydrolysis assisted by microwave irradiation was assessed using the Hammett acidity function (H0) and theoretical calculations.

Understanding the role of hydrogen bonding in Brønsted acidic ionic liquid-catalyzed transesterification: a combined theoretical and experimental investigation

2016 ◽  
Vol 18 (48) ◽  
pp. 32723-32734 ◽  
Author(s):  
Kaixin Li ◽  
Yibo Yan ◽  
Jun Zhao ◽  
Junxi Lei ◽  
Xinli Jia ◽  
...  
Keyword(s):  
Experimental Investigation ◽  
Ionic Liquid ◽  
Hydrogen Bonding ◽  
Catalytic Activity ◽  
Ionic Liquids ◽  
Acidic Ionic Liquid ◽  
Brønsted Acidic Ionic Liquid ◽  
Acidic Ionic Liquids ◽  
Hydrogen Bonding Networks

The intra- and inter-hydrogen bonding networks that govern the catalytic activity of Brønsted acidic ionic liquids were identified.

Preparation of Biodiesel from Tung Oil Catalyzed by Sulfonic-Functional Brǒnsted Acidic Ionic Liquids

2011 ◽  
Vol 314-316 ◽  
pp. 1459-1462 ◽  
Author(s):  
Jian Hui Zhou ◽  
Yu Jing Lu ◽  
Bao Hua Huang ◽  
Yan Ping Huo ◽  
Kun Zhang
Keyword(s):  
Catalytic Activity ◽  
Ionic Liquids ◽  
Sulfonic Acid ◽  
Acid Group ◽  
Sulfonic Acid Group ◽  
Tung Oil ◽  
Acidic Ionic Liquids ◽  
Good Catalytic Activity

Preparation of biodiesel from tung oil catalyzed by five Brǒnsted acidic ionic liquids (ILs) with propyl sulfonic acid group was investigated. These ILs show good catalytic activity for the transeserification of tung oil. Among these ILs, [C3SO3Hmim]HSO4 showed a highest catalytic activity. In addition, these ionic liquids had a good reusability and could be easily separated from the biodiesel.

Properties and catalytic activity of magnetic and acidic ionic liquids: Experimental and molecular simulation

2014 ◽  
Vol 105 ◽  
pp. 300-307 ◽  
Author(s):  
Cunshan Zhou ◽  
Xiaojie Yu ◽  
Haile Ma ◽  
Xingyi Huang ◽  
Henan Zhang ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Ionic Liquids ◽  
Molecular Simulation ◽  
Acidic Ionic Liquids

High Efficacy Glycerol Acetalization with silica gel immobilized Bronsted acidic ionic liquids catalyst - Preparation and comprehending the counter-anion effect on the catalytic activity

2021 ◽  
Author(s):  
Shalini Shashni ◽  
Vasundhara Singh ◽  
Amrit Pal Toor
Keyword(s):  
Catalytic Activity ◽  
Ionic Liquids ◽  
Silica Gel ◽  
Catalyst Preparation ◽  
High Efficacy ◽  
Counter Anion ◽  
Anion Effect ◽  
Acidic Ionic Liquids ◽  
Mesoporous Silica Gel ◽  
Nano Catalysts

The subsequent imidazolium sulfonate zwitterions (ZIs) with unconventional counter-anions were used to fabricate a series of mesoporous silica gel immobilized Bronsted acidic ionic liquids (SG@BAILs) nano-catalysts. In comparison to traditional...

Cellulose Hydrolysis by Acidic Ionic Liquids Enhanced with Microwave Heating

2018 ◽  
Vol 1145 ◽  
pp. 75-79 ◽  
Author(s):  
Hai Yun Ma ◽  
Zhi Ping Zhao ◽  
Peng Lu
Keyword(s):  
Ionic Liquids ◽  
Microwave Heating ◽  
Reducing Sugars ◽  
Cellulose Hydrolysis ◽  
Degree Of Polymerization ◽  
Deionized Water ◽  
Acidic Ionic Liquids ◽  
Hydrolysis Of Cellulose ◽  
Total Reducing Sugars ◽  
Hydrolysis Of

The hydrolysis of cellulose into platform compounds and chemicals fuels has gained much attention to relieve the global energy crisis and environmental pollution. The filter paper (FP) cellulose with average degree of polymerization (DP) of 1000-1300 was dissolved in 1-butyl-3-methylimidazolium chloride ([BMIM]Cl) firstly. And then acidic ionic liquids (ILs), ([(CH2)3SO3HVIm]HSO4) as the catalyst was applied to hydrolyze the FP cellulose by microwave heating. Compared with the oil bath heating method, microwave heating could effectively increase the total reducing sugars (TRS) yield about 10.7%. When the ratio of ILs catalyst to FP (w/w) was 0.167, and the ratio of deionized water to FP (w/w) was 0.833, the TRS yield was up to 60.8% within 20 min at 100°C.

Intrinsic catalytic activity of Brønsted acid ionic liquids for the synthesis of triphenylmethane and phthalein under microwave irradiation

RSC Advances ◽  
2012 ◽  
Vol 2 (32) ◽  
pp. 12112 ◽  
Author(s):  
Amol S. Chaudhari ◽  
Yogesh S. Parab ◽  
Vikas Patil ◽  
N. Sekar ◽  
S. R. Shukla
Keyword(s):  
Catalytic Activity ◽  
Ionic Liquids ◽  
Microwave Irradiation ◽  
Bronsted Acid ◽  
Brønsted Acid ◽  
Brönsted Acid

Synthesis, Characterization of Novel Hexamethyleneiminium-Based Ionic Liquids and their Application in Esterification

2011 ◽  
Vol 233-235 ◽  
pp. 155-159
Author(s):  
Gong Li ◽  
Fei Ke Wu ◽  
Hui Juan Tong
Keyword(s):  
Catalytic Activity ◽  
Ionic Liquids ◽  
Citric Acid ◽  
Hydrogen Sulfate ◽  
Catalytic Activities ◽  
H Nmr ◽  
Acidic Ionic Liquids ◽  
Ft Ir

Three novel Brønsted acidic ionic liquids (ILs), 1-(3-sulfopropyl) hexamethyleneiminium hydrogen sulfate ([HMIPS]HSO4), 1-(3-sulfopropyl) hexamethyleneiminium tosilate ([HMIPS]OTs) and 1-hexamethyleneiminium hydrogen sulfate([HMI]HSO4), were synthesized and characterized by1H NMR, FT-IR and DSC-TG. Their catalytic activities for the esterification of citric acid with n-butanol were examined and compared with the imidazolium-based ILs. The results showed that the hexamethyleneiminium-based ILs exhibits excellent catalytic activity. By using [HMIPS]HSO4as the catalyst, the yield of tributyl citrate reached 97.5%. Furthermore, the catalysts were reused at least 10 times without significant decrease in activity

scholarly journals Synthesis and Catalytic Activity of Novel Heternuclear Dication Brønsted Acidic Ionic Liquids

2015 ◽  
Vol 35 (4) ◽  
pp. 890 ◽  
Author(s):  
Wenhui Cui ◽  
Youming Zhang ◽  
Ruyan Jia ◽  
Yu Wang ◽  
Taibao Wei
Keyword(s):  
Catalytic Activity ◽  
Ionic Liquids ◽  
Acidic Ionic Liquids
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