High-yielding synthesis of alkyl stearates from stearic acid within a closed batch reactor using heteropolyacids as efficient and recyclable catalyst

Vinod, Nivedha; Tiwari, Rahul; Bhat, Navya Subray; Mal, Sib Sankar; Dutta, Saikat

doi:10.1063/5.0005580

Cited by 2 publications

(1 citation statement)

References 29 publications

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“…Fatty acid esters are an important group of compounds that are present as reaction intermediates in the formation of amides, sulfonates and long-chain alcohols used in polymer, textile and solvent industries [ 1 , 2 , 3 ]. Stearates (C 17 H 35 COOR, with R = metal ion, carbohydrates, polyols, or alkyl groups) are essential in the production of cosmetics, drugs, lubricants and surfactants [ 4 , 5 , 6 , 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

Lipase-Assisted Synthesis of Alkyl Stearates: Optimization by Taguchi Design of Experiments and Application as Defoamers

Olvera-Ureña,

Lopez-Tellez,

Vizueto

et al. 2023

Molecules

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The present work proposes the optimization of enzymatic synthesis of alkyl stearates using stearic acid, alkyl alcohols (C1-OH, C2-OH, C4-OH, C8-OH and C16-OH) and Candida rugosa lipase by a L9 (34) Taguchi-type design of experiments. Four variables were evaluated (reaction time, temperature, kU of lipase and alcohol:stearic acid molar ratio), ensuring that all variables were critical. In optimal conditions, five stearates were obtained with conversions > 90%. The obtained products were characterized by nuclear magnetic resonance (NMR). Additionally, the defoaming capacity of the five stearates was evaluated, obtaining better performance for the compound synthesized from C8-OH alcohol.

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Section: Introductionmentioning

confidence: 99%

Lipase-Assisted Synthesis of Alkyl Stearates: Optimization by Taguchi Design of Experiments and Application as Defoamers

Olvera-Ureña,

Lopez-Tellez,

Vizueto

et al. 2023

Molecules

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Cerium(III)phosphotungstate: an efficient catalyst in esterification of fatty acids

Yadav,

Sharma

2024

Zas Mat

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In this report, a known heteropolyacid salt (HPAs) cerium (Ⅲ) phosphotungstate was synthesized in a volume ratio of 2:1:2 with a molar ratio of 1:1:1 of each ingredient. These HPAs are further utilized in form of a catalyst to generate biodiesel through the esterification of variable carbon chain length alcohols (methanol, ethanol, n-propanol, isopropanol, n-butanol) and stearic acid at different conditions of reaction. FTIR of the produced biodiesel was also done for the assurance of ester peaks in it. Analysis of some important biodiesel properties (density, dynamic viscosity, acid value, aniline point, boiling point, cloud and pour point, and flash and fire point) etc., to differentiate and validate the results. A large surface area of the catalyst i.e. 121.427 m2/g determined using the BET surface area analyser, supports the fact of outrageous catalytic action in the esterification reaction. The effect of additives was also studied on the properties of resultant biodiesel. The calorific value of the samples was measured at 7320 Kcal/kg without additive and 7512 Kcal/kg after adding toluene (as an additive) in the biodiesel generated in the study. The pour point temperature of the biodiesel with additives was observed even < 20℃.

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High-yielding synthesis of alkyl stearates from stearic acid within a closed batch reactor using heteropolyacids as efficient and recyclable catalyst

Cited by 2 publications

References 29 publications

Lipase-Assisted Synthesis of Alkyl Stearates: Optimization by Taguchi Design of Experiments and Application as Defoamers

Lipase-Assisted Synthesis of Alkyl Stearates: Optimization by Taguchi Design of Experiments and Application as Defoamers

Cerium(III)phosphotungstate: an efficient catalyst in esterification of fatty acids

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