Deacidification of vegetable oil by extraction with solvent recovery

Busto, Mariana; Vera, Carlos Román

doi:10.1007/s10450-019-00102-9

Cited by 7 publications

(4 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is also detrimental to the solvent recovery costs because very large methanol volumes must be distilled off and recycled. In this sense, unusual solvent regeneration schemes, like those proposed by Busto et al, could be used. ,, …”

Section: Resultsmentioning

confidence: 99%

“…In this sense, unusual solvent regeneration schemes, like those proposed by Busto et al, could be used. 6,33,37 The steady-state values of the acid content of treated feedstocks of varying initial TANs are plotted in Figure 7 Of course, the final value of TAN is a function of not only the solvent-to-oil ratio but also the number of stages. For an initial TAN = 5, 3, countercurrent stages reduce the TAN to a final value of 0.35 with a solvent-to-oil ratio of 3, while four countercurrent stages reduce the TAN to 0.47 with a solventto-oil ratio of 2.…”

Section: Experimental Partition Coefficient M and Massmentioning

confidence: 99%

See 1 more Smart Citation

Integration of Solvent Extraction and Noncatalytic Esterification for the Treatment of Acidic Feedstocks

et al. 2020

Self Cite

View full text Add to dashboard Cite

The possibility of directly feeding the extract of a liquid−liquid extraction unit to a chemical reactor is analyzed. An example of extraction and noncatalytic esterification of naphthenic acids from acid petroleum crudes is used. Methanol is used both as a solvent and as a reactant. Separate tests of extraction and reaction are performed, and the performance of an integrated process is deduced by computer simulation. Thermodynamic and kinetic parameters for the extraction of naphthenic acids from an acid crude were determined. A partition coefficient of m = 0.66 at 60 °C between the alcoholic and petroleum phases was found. Three successive batch extractions with a 1:1 v/v ratio reduced the acidity from 4.3 to about 1.1 mg KOH g −1 . Naphthenic acid concentrates were reacted with supercritical methanol in a batch reactor at high temperatures (280 °C), yielding naphthenic esters. Reaction of 1−2 h with methanol-to-oil molar ratios of 3−6 yielded 92−96% conversion because of a relatively low value of the equilibrium constant. Total conversion could, however, be achieved with the highly diluted extracts. Simulations were run using three countercurrent mixer−settlers and a noncatalytic reactor. The results indicated that extraction/supercritical esterification is a convenient pretreatment step of acidic feedstocks because of its simplicity, the good quality of the deacidified feedstock (acidity <0.5 mg KOH g −1 ), the total removal of the acids, and the good properties of the ester product as a fuel additive. Characterization of the methyl naphthenate product showed that it had a lower viscosity than the crude or the naphthenic acids; a high flash point; and total miscibility in gasoline, kerosene, and diesel. These and other properties showed that it could be sent to the diesel or fuel oil pools. 46 extraction does not act as a reagent but it is a suitable solvent 47 for carrying out a reaction on the solute with good activity and 48 selectivity to the desired product. These two requirements add 49 to other requirements for choosing a suitable solvent for 50 extraction. These have been extensively reviewed in the 51 literature 4−6 and can be summarized as follows: (a) a high 52 solubility for the solute and low solubility for the feed; (b) a 53 density difference with the feed, higher than 0.15 g cm −3 ; (c) a 54 medium value of surface tension (5−30 dyne cm −1 ); (d) a high 55 resistance to thermal degradation if solvent regeneration by 56 evaporation is used; and (e) a low viscosity for ease of 57 handling. 58 Noncatalytic esterification is a brute-force method making 59 use of the nucleophilic reactive properties of supercritical 60 alcohols. From a process point of view, it has the advantage 61 that it is scalable to any scale of production and is easily 62 implemented. Major drawbacks in comparison to catalytic 63 esterification are the high temperature and pressure levels 64 involved and the need for efficient heat-recovery schemes. 7−10 65 In this report, the esters obtained in the supercritical reactor

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Experimental Partition Coefficient M and Massmentioning

confidence: 99%

Integration of Solvent Extraction and Noncatalytic Esterification for the Treatment of Acidic Feedstocks

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…The solvent extraction method adopts the principle of similarity and compatibility to extract the effective components. The effective components have good selectivity but low extraction efficiency (Busto and Vera 2019). The ultrasonic extraction method uses the strong vibration produced by ultrasonic waves to release the substances in plant cells.…”

Section: Extraction Of Berberinementioning

confidence: 99%

Isolation and identification of the antibacterial compounds in Coptis chinensis for the preservation of wood

Wang

Zhao

et al. 2021

BioRes

View full text Add to dashboard Cite

Wood is a biomass material that is easily eroded by wood-rotting fungi. Coptis chinensis is a natural green plant, which has an inhibitory effect on most microorganisms. Based on the highly toxic effects of the currently used wood chemical preservatives on humans, animals, and the environment, Coptis chinensis was selected to perform decay resistance experiments of wood in this paper. The active ingredients with bacteriostatic properties in Coptis chinensis were separated and screened via chemical treatment, and their structure was identified via nuclear magnetic resonance spectroscopy. The primary bacteriostatic components in Coptis chinensis were berberine hydrochloride, palmatine, and jatrorrhizine. The bacteriostatic zone experiment with a single component and different compounds for white-rot and brown-rot fungus were tested by the disc agar diffusion method. The bacteriostatic effect of berberine hydrochloride in a single active fraction was better. The three-fraction compound had the best bacteriostatic effect and was equivalent to alkaline copper quaternary. The natural active bacteriostatic fractions in Coptis chinensis had noticeable inhibitory effects on white-rot fungus (Trametes versicolor (L.) Lloyd) and brown-rot fungus (Gloeophyllum trabeum (Pers.) Murrill). The minimum bacteriostatic concentration was 0.01 g/mL. The results showed that Coptis extracts had potential as a wood protectant.

show abstract

“…Apelblat, et al [26] studied soybean and jojoba oils using various solvents, including N-methylformamide, formamide, dimethylsulfoxide, 1,2-butanediol, and 2-butene-1,4-diol. Batista, et al in [27] and in [28], Mohsen-Nia and Dargahi in [29], Silviana in [30], and Mohsen-Nia and Khodayari in [31] and Busto and Vera in [32] studied canola, corn, palm, and sunflower oils, respectively, using anhydrous alcohols as solvents. Using aqueous ethanol as solvent, Gonçalves, et al in [33], Gonçalves and Meirelles in [34], da Silva, et al in [35], Chiyoda,et al in [36], Cuevas,et al in [37], and Rodrigues and Meirelles in [38] have reported LLE on corn oil, palm oil, palm oil fractions, soybean oil, sunflower oil, and peanut and avocado seed oils, respectively.…”

Section: Introductionmentioning

confidence: 99%

Extraction of Free Fatty Acid Mixtures from Rice Bran Oil by Aqueous Renewable Alcohols: Liquid-liquid Equilibrium Diagram and Number of Equilibrium Stages

Putrawan

Widyasih

Wulantari

2021

J. Eng. Technol. Sci.

View full text Add to dashboard Cite

This work is aimed to measure the liquid-liquid equilibria of rice bran oil-fatty acid-aqueous alcohols using fatty acid mixtures derived from rice bran oil as solutes and to calculate the number of equilibrium stages required for the extraction process. Renewable alcohols, ethanol and isopropanol in aqueous form were used as solvents. The liquid-liquid equilibrium data were measured at 25 °C and presented as ternary diagrams. It was found that ethanol gave a lower distribution coefficient than isopropanol. For the same solvent, increasing the water content resulted in a lower distribution coefficient. For the free fatty acid contents of 30% in the feed and of 10% to 2.5% in the raffinate, the minimum solvent-to-feed ratio was found to be in the range of 1 to 5. Using solvent-to-feed ratios from 2 to 4, the number of extraction stages required was in the range of 1 to 8. Based on the minimum solvent-to-feed ratio and number of equilibrium stages, isopropanol was found to be better than ethanol.

show abstract

Deacidification of vegetable oil by extraction with solvent recovery

Cited by 7 publications

References 49 publications

Integration of Solvent Extraction and Noncatalytic Esterification for the Treatment of Acidic Feedstocks

Integration of Solvent Extraction and Noncatalytic Esterification for the Treatment of Acidic Feedstocks

Isolation and identification of the antibacterial compounds in Coptis chinensis for the preservation of wood

Extraction of Free Fatty Acid Mixtures from Rice Bran Oil by Aqueous Renewable Alcohols: Liquid-liquid Equilibrium Diagram and Number of Equilibrium Stages

Contact Info

Product

Resources

About