Solubility behavior of mixtures containing refined soybean oil and low-toxic solvents at different temperatures

Homrich, Perci Odilon Bonetti; Mariutti, Lilian Regina Barros; Bragagnolo, Neura; Ceriani, Roberta

doi:10.1016/j.fluid.2017.03.013

Cited by 13 publications

(27 citation statements)

References 40 publications

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“…The correlations of Othmer-Tobias [24] and Bancroft [25] were used to verify the quality of tie lines obtained from all systems. Quantification of the composition of the tie lines was achieved using the method of Merchuk et al [26] and following the procedure used by Homrich et al [27] for calculating standard uncertainties in mass fractions through error propagation. The effects of temperature and polymer molecular weight on the LLE were analyzed.…”

Section: Introductionmentioning

confidence: 99%

Study of liquid-liquid equilibria in aqueous two-phase systems formed by poly (ethylene glycol) (PEG) and sodium thiosulfate pentahydrate (Na2S2O3.5H2O) at different temperatures

Oliveira

Sosa

Costa

et al. 2018

Fluid Phase Equilibria

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This study aimed at providing experimental liquid-liquid equilibrium (LLE) data for aqueous two-phase systems (ATPSs) formed by poly (ethylene glycols) (PEG) of different molecular weights (1500 or 4000 or 6000) g.mol À1 and sodium thiosulfate pentahydrate at different temperatures (293.15e313.15) K and under atmospheric pressure. Correlations of experimental data of binodal curves were carried out using the Merchuk methodology. The effects of temperature, polymer molecular weight and of the nature of the anion of salts on binodal curves were discussed. In comparison with other anions previously investigated, the salting-out ability of the thiosulfate anion was between those of citrate and tartrate anions. Finally, the Othmer-Tobias and Bancroft equations and the NRTL activity coefficient model were used for correlating tie line compositions.

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Section: Introductionmentioning

confidence: 99%

Study of liquid-liquid equilibria in aqueous two-phase systems formed by poly (ethylene glycol) (PEG) and sodium thiosulfate pentahydrate (Na2S2O3.5H2O) at different temperatures

Oliveira

Sosa

Costa

et al. 2018

Fluid Phase Equilibria

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“…This is in agreement with the results Mormann and coworkers ( Mormann and Mohamed, 2004 ) obtained when starch was reacted with vinyl acetate in DMSO. The underlying cause is that soybean oil is only partially miscible with DMSO ( Homrich et al., 2017 ). Furthermore, at lower starting starch concentrations, the anhydroglucose: triglycerides molar ratio increases; leading to higher reaction rates.…”

Section: Resultsmentioning

confidence: 99%

Hydrophobizing cellulose surfaces via catalyzed transesterification reaction using soybean oil and starch

Nguyen

2020

Heliyon

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Biodegradable modified natural polymers have great potential in curbing the threat of plastic pollution, but are still uncompetitive to petrochemical-based plastic. In this study, starch was hydrophobized by treating starch-dimethyl sulfoxide solutions with soybean oil at high temperature in the presence of sodium carbonate, then spray-coated on paper. The modified starch was evaluated by Fourier-transform infrared spectroscopy analysis and contact angle value measurement of coated paper. FTIR analysis confirmed the substitution of hydroxyl groups with fatty acid ester and provided an estimate of the degree of substitution. The contact angle value of starch-coated paper surfaces was 121°, and was 111° after 10 min, demonstrating the high hydrophobicity and potential of the modified starch coating as a water-resistant treatment. The high hydrophobicity of the coated paper was due to formation of a textured surface with two levels of roughness, caused by the deposition of rough hydrophobic starch particles on paper fibers.

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“…Liquid–liquid extraction is based on the difference in solubility of free fatty acids and triacylglycerols from vegetable oil in the solvent. The presence of water, a highly polar substance, in organic solvents tends to decrease the mutual solubility of the system, for example this occurs when anhydrous ethanol and water are mixed with vegetable oils (Homrich et al, 2017). For this method, several studies have determined phase equilibrium data in systems involving oils and ethanol or methanol, or isopropanol plus cosolvents employing processes continuous with extraction column (Homrich et al, 2019; Homrich & Ceriani, 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Liquid–liquid extraction laboratory experiments of the vegetable oils with polar solvents have been performed (Ferreira, Bessa, Abreu, Meirelles, & Caldas Batista, 2018; Gonçalves et al, 2016; Homrich et al, 2017). However, pilot scale apparatus to liquid–liquid refining has not yet been extensively studied and, in this way may present novelties for this area of study.…”

Section: Introductionmentioning

confidence: 99%

Improving quality of refined canola oil byliquid–liquidextraction on pilot scale apparatus

Tiritan

Tonial

Dalmolin

et al. 2020

J Food Process Engineering

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The aim of this work was to refine expeller‐pressed crude canola oil by pilot scale liquid–liquid extraction with hydrated ethanol as solvent. Quality indices were determined, and shelf life was estimated in the accelerated test. The scale projection was performed based on the results of the pilot scale. The experimental device operates in a batch process with 89.6% yield deacidification and an average of 4.4 contacts per assay. In this process, without bleaching and deodorization steps, physicochemical parameters were according to the Codex Alimentarius standards, except moisture. In this way, it will be necessary to apply nonthermal techniques to remove water. The major fatty acids identified were oleic and linoleic acid and the absence of trans fatty acids. For the shelf life, the refined oil presented free fatty acids 0.28% and peroxide value 12.65 meq O2 kg−1 after 24 hr at 65°C. The pilot scale results showed that the technique is suitable to produce edible oils. A liquid–liquid extractor was designed for industrial scale with the total volume will be 12,000 L. To process 6 tons of crude canola oil per day, the unit will be able to produce 1.3 thousand tons per year of refined canola oil. Practical applications After acid degumming, canola oil was submitted to liquid–liquid extraction, using ethanol as solvent. As a result, two traditional steps of refining vegetable oils have been eliminated: bleaching and deodorization. This fact directly impacts on physical space of industry, maintenance of equipment and need for operators. Trans fats were not detected in canola oil, pointing that the technique is efficient in the production of healthier oils, with less environmental impact.

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Solubility behavior of mixtures containing refined soybean oil and low-toxic solvents at different temperatures

Cited by 13 publications

References 40 publications

Study of liquid-liquid equilibria in aqueous two-phase systems formed by poly (ethylene glycol) (PEG) and sodium thiosulfate pentahydrate (Na2S2O3.5H2O) at different temperatures

Study of liquid-liquid equilibria in aqueous two-phase systems formed by poly (ethylene glycol) (PEG) and sodium thiosulfate pentahydrate (Na2S2O3.5H2O) at different temperatures

Hydrophobizing cellulose surfaces via catalyzed transesterification reaction using soybean oil and starch

Improving quality of refined canola oil byliquid–liquidextraction on pilot scale apparatus

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