scholarly journals A DFT study on the mechanism of the sulfonic acid + alcohol esterification reaction

RSC Advances ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 3828-3832
Author(s):  
Luis Salvatella
Keyword(s):  
Sulfonic Acid ◽  
Dft Study ◽  
Esterification Reaction ◽  
Sulfur Intermediates ◽  
Acid Esterification

A DFT study reveals the unfeasibility of pentacoordinate sulfur intermediates in the sulfonic acid esterification reaction.

Study on Synthesis of Ester of Citric Acid and Palmityl Alcohol

2014 ◽  
Vol 900 ◽  
pp. 361-364
Author(s):  
Xiao Hui Wang ◽  
Xi Hua Du ◽  
Li Min Dong
Keyword(s):  
Reaction Time ◽  
Citric Acid ◽  
Cation Exchange ◽  
Sulfonic Acid ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Molar Ratio ◽  
Esterification Reaction ◽  
Process Conditions ◽  
Toluene Sulfonic Acid

Esters of Citric acid and palmityl alcohol were synthesized by esterification reaction under catalysis of cation exchange resin and P-toluene sulfonic acid respectively. The effects of amount of catalyst, ratio of raw materials, reaction time and temperature on the synthesis reaction were investigated . The experimental results showed that optimum of process conditions were 1:1~1:1.5 molar ratio of citric acid and palmityl alcohol, reaction temperature of 130~140°C, reaction time of 2 h. Conversion of palmityl alcohol were all more than 90% under 0.3% dosage using p-toluene sulfonic acid as the catalyst, or 0.5% dosage using 721 cation exchange resin with sulfonic acid type as catalyst. The synthesized product had good surface activity.

OPTIMIZATION STUDIES OF OIL PALM EMPTY FRUIT BUNCH LIQUEFACTION FOR CARBON CRYOGEL PRODUCTION AS CATALYST IN LEVULINIC ACID ESTERIFICATION

2018 ◽  
Vol 80 (2) ◽  
Author(s):  
Muzakkir Mohammad Zainol ◽  
Nor Aishah Saidina Amin ◽  
Mohd Asmadi
Keyword(s):  
Oil Palm ◽  
Levulinic Acid ◽  
Condensation Reaction ◽  
Sol Gel ◽  
Esterification Reaction ◽  
Empty Fruit Bunch ◽  
Carbon Cryogel ◽  
Predicted Values ◽  
Poly Condensation ◽  
Acid Esterification

Liquefaction of oil palm empty fruit bunch (EFB) using 1-butyl-3-methylimidazolium chloride was investigated in this study. The experiments were designed based on central composite by response surface methodology (RSM). The optimum conditions for the predicted liquefied EFB yield of 80.97 wt% was obtained at the temperature of 151.9 °C, a reaction time of 112.78 min and a ratio (Ionic liquid to EFB) of 4.27. The Regression coefficient (R2) for the model was 0.90 indicating a high correlation between observed and predicted values. The liquefied EFB mixture was used in the preparation of carbon cryogel via a sol-gel poly-condensation reaction and calcination process. The presence of sulfuric acid during the gel synthesis promoted an active site on the gel linkage and surface. The carbon cryogel prepared was tested as catalyst in an esterification reaction. The conversion of levulinic acid and yield of ethyl levulinate were reported as 58.7% ansd 57.2 mol%, respectively.

scholarly journals Effect of the Acid Treatment of Montmorillonite Clay in the Oleic Acid Esterification Reaction

2015 ◽  
Vol 18 (2) ◽  
pp. 283-287 ◽  
Author(s):  
Alexsandra Rodrigues do Nascimento ◽  
José Antônio Barros Leal Reis Alves ◽  
Marcus Antônio de Freitas Melo ◽  
Dulce Maria de Araújo Melo ◽  
Marcelo José Barros de Souza ◽  
...  
Keyword(s):  
Oleic Acid ◽  
Acid Treatment ◽  
Montmorillonite Clay ◽  
Esterification Reaction ◽  
Acid Esterification

scholarly journals High activity magnetic core-mesoporous shell sulfonic acid silica nanoparticles for carboxylic acid esterification

2017 ◽  
Vol 92 ◽  
pp. 56-60 ◽  
Author(s):  
Zhijun Tai ◽  
Mark A. Isaacs ◽  
Christopher M.A. Parlett ◽  
Adam F. Lee ◽  
Karen Wilson
Keyword(s):  
Carboxylic Acid ◽  
Silica Nanoparticles ◽  
High Activity ◽  
Sulfonic Acid ◽  
Magnetic Core ◽  
Mesoporous Shell ◽  
Acid Esterification

scholarly journals Study of the Correlation Dependence of the Succinic Acid Esterification Reaction by Computer Modeling

2020 ◽  
Vol 127 (2) ◽  
pp. 16-19
Author(s):  
M. A. Mammadyarov ◽  
◽  
F. M. Veliyeva ◽  
F. H. Aliyeva ◽  
K. O. Israfilova ◽  
...  
Keyword(s):  
Succinic Acid ◽  
Computer Modeling ◽  
Esterification Reaction ◽  
Correlation Dependence ◽  
Acid Esterification

Study on Bio-Fuels Drop Acid by [BSPy]HSO4 Catalytic Esterification

2013 ◽  
Vol 781-784 ◽  
pp. 2433-2437 ◽  
Author(s):  
Ai Hua Zhang ◽  
Zhi Hong Xiao ◽  
Liang Bo Zhang ◽  
Ru Kuan Liu ◽  
Wu Hong Zhong ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Reaction Time ◽  
Reaction Temperature ◽  
Acid Value ◽  
Esterification Reaction ◽  
Process Conditions ◽  
High Catalytic Activity ◽  
Brønsted Acidic Ionic Liquid ◽  
The Stability ◽  
Acid Esterification

Research on the synthesis of BrOnsted acidic ionic liquid by the method of solvent, the pyrolysis bio-fuel with cornus wisoniana oil drop acid esterification reaction, the catalyst dosage, reaction time and reaction temperature on the effects of the acid dropping and in the best optimization under the condition of the stability of the catalyst were investigated. The experimental results show that [BSPHSO4 with high catalytic activity, optimization of process conditions as follows: 1.2% of catalyst, reaction temperature 75 °C, reaction time of 70 min, acid value reduced to 2.0 mg KOH/g. By optimizing the cycle experiment, the stability of the catalyst performance is good, the catalytic activity is relatively stable.

scholarly journals Sulfonic acid functionalised SBA-15 as catalysts for Beckmann rearrangement and esterification reaction

2007 ◽  
Vol 15 (2) ◽  
pp. 139-143 ◽  
Author(s):  
Wei Zhao ◽  
Petra Salame ◽  
Franck Launay ◽  
Antoine Gédéon ◽  
Zhengping Hao
Keyword(s):  
Sulfonic Acid ◽  
Beckmann Rearrangement ◽  
Esterification Reaction
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