Significant effects of the anion on the catalytic behaviour of sulfonic acid-functionalized ionic liquids in transesterification reactions – A combined electrochemical/catalytic study

2021 ◽  
Vol 513 ◽  
pp. 111821
Author(s):  
María B. Martini ◽  
Claudia G. Adam ◽  
José L. Fernández
Keyword(s):  
Ionic Liquids ◽  
Sulfonic Acid ◽  
Catalytic Behaviour

Insights on the catalytic behaviour of sulfonic acid-functionalized ionic liquids (ILs) in transesterification reactions – voltammetric characterization of sulfonic task-specific ILs with bisulfate anions

2021 ◽  
Vol 23 (4) ◽  
pp. 2731-2741
Author(s):  
María B. Martini ◽  
José L. Fernández ◽  
Claudia G. Adam
Keyword(s):  
Cyclic Voltammetry ◽  
Ionic Liquids ◽  
Sulfuric Acid ◽  
Sulfonic Acid ◽  
Acid Catalysis ◽  
On Demand ◽  
Catalytic Behaviour ◽  
Sulfonic Acid Groups

Cyclic voltammetry measurements on imidazolic ionic liquids with sulfonic acid groups and bisulfate counterions revealed that they work as efficient reservoirs of sulfuric acid and are able to dose it on demand to uphold an efficient acid catalysis.

n-Butyraldehyde Self-Condensation Catalyzed by Sulfonic Acid Functionalized Ionic Liquids

2014 ◽  
Vol 53 (43) ◽  
pp. 16707-16714 ◽  
Author(s):  
Xiaolong Zhang ◽  
Hualiang An ◽  
Hongqi Zhang ◽  
Xinqiang Zhao ◽  
Yanji Wang
Keyword(s):  
Ionic Liquids ◽  
Sulfonic Acid

Synthesis of 4,4′-MDC in the Presence of Sulfonic Acid-functionalized Ionic Liquids

2009 ◽  
Vol 17 (5) ◽  
pp. 756-760 ◽  
Author(s):  
Yanlou GENG ◽  
Liyan HU ◽  
Xinqiang ZHAO ◽  
Hualiang AN ◽  
Yanji WANG
Keyword(s):  
Ionic Liquids ◽  
Sulfonic Acid

scholarly journals Biodiesel fromCitrullus colocynthisOil: Sulfonic-Ionic Liquid-Catalyzed Esterification of a Two-Step Process

2014 ◽  
Vol 2014 ◽  
pp. 1-11 ◽  
Author(s):  
Yasir Ali Elsheikh ◽  
Faheem Hassan Akhtar
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Sulfonic Acid ◽  
Molar Ratio ◽  
Disulfonic Acid ◽  
Hydrogen Sulfate ◽  
Citrullus Colocynthis ◽  
Step Process ◽  
Acidic Catalyst ◽  
Acidic Catalysts

Biodiesel was prepared fromCitrullus colocynthisoil (CCO) via a two-step process. The first esterification step was explored in two ionic liquids (ILs) with 1,3-disulfonic acid imidazolium hydrogen sulfate (DSIMHSO4) and 3-methyl-1-sulfonic acid imidazolium hydrogen sulfate (MSIMHSO4). Both ILs appeared to be good candidates to replace hazardous acidic catalyst due to their exceptional properties. However, the two sulfonic chains existing in DSIMHSO4were found to increase the acidity to the IL than the single sulfonic chain in MSIMHSO4. Based on the results, 3.6 wt% of DSIMHSO4, methanol/CCO molar ratio of 12 : 1, and 150°C offered a final FFA conversion of 95.4% within 105 min. A 98.2% was produced via second KOH-catalyzed step in 1.0%, 6 : 1 molar ratio, 600 rpm, and 60°C for 50 min. This new two-step catalyzed process could solve the corrosion and environmental problems associated with the current acidic catalysts.

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.

An Efficient Synthesis of Pyrrolidinone Derivatives in the Presence of 1,1′-Butylenebis(3-sulfo-3H-imidazol-1-ium) Chloride

2018 ◽  
Vol 71 (8) ◽  
pp. 566 ◽  
Author(s):  
Nader Ghaffari Khaligh ◽  
Kim Foong Chong ◽  
Taraneh Mihankhah ◽  
Salam Titinchi ◽  
Mohd Rafie Johan ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Sulfonic Acid ◽  
Electronic Effect ◽  
Catalytic Properties ◽  
Catalytic Efficiency ◽  
Optimal Conditions ◽  
Efficient Synthesis ◽  
Mild Conditions ◽  
Structure Activity ◽  
Relationship Of

The catalytic efficiency of 1,1′-butylenebis(3-sulfo-3H-imidazol-1-ium) chloride as a sulfonic acid-functionalized ionic liquid was demonstrated for the synthesis of pyrrolidinone derivatives under mild conditions. The electronic effect of substituents on aniline derivatives was investigated. Further, a study on the structure–activity relationship of ionic liquids containing sulfonic groups for the synthesis of ethyl-2-(4-chlorophenyl)-4-hydroxy-5-oxo-1-(p-tolyl)-2,5-dihydro-1H-pyrrole-3-carboxylate was performed under optimal conditions. The results showed that the catalytic properties of ionic liquids containing two sulfonic or imidazole moieties with carbon spacers was superior to ionic liquids having one sulfonic or imidazole moiety with no carbon spacer.

scholarly journals Alkylsulfuric acid ionic liquids: a promising class of strongly acidic room-temperature ionic liquids

2016 ◽  
Vol 52 (25) ◽  
pp. 4640-4643 ◽  
Author(s):  
David Dupont ◽  
Evelien Renders ◽  
Koen Binnemans
Keyword(s):  
Ionic Liquids ◽  
Metal Oxides ◽  
Sulfonic Acid ◽  
Room Temperature ◽  
Metal Extraction ◽  
Room Temperature Ionic Liquids

Alkylsulfuric acid ILs are simple to make and offer a more strongly acidic alternative to sulfonic acid ILs for applications in catalysis, metal extraction and dissolution of metal oxides.

Selective esterification of glycerol with acetic acid or lauric acid over rod-like carbon-based sulfonic acid functionalized ionic liquids

Fuel ◽  
2017 ◽  
Vol 207 ◽  
pp. 136-145 ◽  
Author(s):  
Yingnan Sun ◽  
Jianglei Hu ◽  
Sai An ◽  
Qingqing Zhang ◽  
Yihang Guo ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Ionic Liquids ◽  
Lauric Acid ◽  
Sulfonic Acid ◽  
Selective Esterification ◽  
Carbon Based
Sign in / Sign up

Export Citation Format

Share Document