Low-pressure solvent extraction of oil from macauba (Acrocomia aculeata) pulp: characterization of oil and defatted meal

Trentini, Caroline Portilho; Oliveira, Dalany Menezes; Zanette, Cristina Maria; Silva, Camila da

doi:10.1590/0103-8478cr20150740

Cited by 23 publications

(27 citation statements)

References 25 publications

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“…In relation to the composition of the oils obtained using different solvents and extraction methods, there was a predominance of oleic and palmitic acids in the macauba pulp oil, as reported in studies available in the literature (Coimbra & Jorge, ; Hiane et al, ; Silva et al, ; Souza, Scheufele, Pasa, Arroyo, & Pereira, ; Trentini et al, ).…”

Section: Resultsmentioning

confidence: 58%

Ultrasound‐assisted extraction of oil from macauba pulp using alcoholic solvents

Rodrigues¹,

Mello

Garcia³

et al. 2017

J Food Process Engineering

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Ultrasound‐assisted extraction (UAE) of macauba pulp oil was investigated using ethanol and isopropanol as solvents and compared with the conventional extraction technique. An experimental design was applied to evaluate the influence of the experimental variables (temperature, solvent to pulp ratio, and time) on the oil extraction and to optimize them. The optimum conditions were then evaluated in relation to the extraction kinetics and the effect of the application of ultrasound in the process was determined. For both techniques, higher yields were obtained with the use of ethanol as the solvent. The results showed that increasing the temperature, the amount of solvent used and the extraction time leads to greater oil removal from macauba pulp (p < .05), and the amount of solvent used in the process had the greatest influence. The maximum oil yields obtained by UAE were 49.2 and 38% with ethanol and isopropanol, respectively, obtained at 60 °C, with a 90‐min extraction time and solvent to pulp ratio of 10, which represent ∼86 and ∼77% of the yield obtained by conventional extraction. The UAE provided better yields when compared to the process without ultrasound. The fatty acids composition was not influenced by the extraction method and solvent used; however, UAE provides oils with higher levels of β‐carotene and flavonoids using ethanol and isopropanol, respectively. Practical applications The optimization of UAE for macauba pulp oil extraction is presented in the present study and the results demonstrate the efficiency of the method for obtaining this oil in low extraction time and solvent consumption. The oil obtained by this technique has higher levels of β‐carotene and flavonoids. Additionally, macauba pulp oil obtained using ethanol and isopropanol with solvent may be used as a food, because these solvents are considered of food grade.

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Section: Resultsmentioning

confidence: 58%

Ultrasound‐assisted extraction of oil from macauba pulp using alcoholic solvents

Rodrigues¹,

Mello

Garcia³

et al. 2017

J Food Process Engineering

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“…It is clear from this table that with the use of polar solvents, in this study and Lescano et al, higher yields can be obtained in comparison with n ‐hexane, which is probably due to the higher percentage of polar lipids in macauba pulp. Trentini et al obtained lower yields using isopropanol due to the lower temperature applied and because the process was conducted at low pressure. Applying an extraction procedure using supercritical carbon dioxide, Nascimento et al obtained low yields due to the low solubility of the triglycerides in the solvent.…”

Section: Resultsmentioning

confidence: 99%

“…The macauba fruit consists mostly of pulp, which has an oil content of around 18.7 to 32 %, and contains a high amount of active compounds . The oil obtained from macauba pulp has high concentrations of β‐carotene, flavonoids, and oleic acid, and lesser contents of phytosterols and tocopherols …”

Section: Introductionmentioning

confidence: 99%

Pressurized liquid extraction of macauba pulp oil

et al. 2017

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The aim of this study was to investigate the extraction of oil from macauba pulp using ethanol and isopropanol as pressurized solvents. Experiments were carried out in a semi‐continuous extractor system at various temperatures (40, 60, and 80 °C) maintaining the pressure fixed at 10 000 kPa and the solvent flow at 3 mL/min and also using conventional extraction (in a Soxhlet). For both methods assessed, higher yields were obtained with the use of ethanol as the solvent. In the pressurized liquid extraction (PLE), an increase in temperature from 40 to 60 °C provided higher yields at 72 min of extraction, which was not influenced by the extraction carried out at 80 °C. This temperature effect was also observed in the extraction kinetics data. The maximum yields obtained by PLE were 44.78 % and 37.12 % with ethanol and isopropanol, respectively, which represents ∼77 % of the yield obtained by conventional extraction. Oleic and palmitic acids are the main fatty acids identified in macauba pulp oil, representing ∼88 % of the fatty acids composition, which was not influenced by the extraction method and solvent used. PLE with ethanol provides oils with higher levels of β‐carotene. The flavonoid content was higher with the use of isopropanol; however, it was not influenced by the method used.

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“…It is usually assumed that macauba oil has got high acidity, although reports in the literature show variable results, with values as low as 0.8% 18 and as high as 65% 32 . Acidity development in the macauba pulp oil seems to be dependent on how the fruits are collected, stored 33,34 , and samples are prepared for analytical procedures 35,36 . It is commonly accepted that fruits should be collected from the bunch and processed as soon as possible to render low acidification, but there is not enough support in the literature for such a claim.…”

Section: Effects Of Drying On the Macauba Pulp Oil Qualitymentioning

confidence: 99%

Macauba ( Acrocomia aculeata ) pulp oil quality is negatively affected by drying fruits at 60 ºC

Favaro

Miranda

Ciaconini

et al. 2017

Braz. arch. biol. technol.

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Low-pressure solvent extraction of oil from macauba (Acrocomia aculeata) pulp: characterization of oil and defatted meal

Abstract: This study aimed to extract the oil from macauba pulp using a low-pressure solvent extraction, as well as characterisation of the extracts and defatted meal obtained using different solvents (n-hexane, ethyl acetate and isopropanol

Cited by 23 publications

References 25 publications

Ultrasound‐assisted extraction of oil from macauba pulp using alcoholic solvents

Ultrasound‐assisted extraction of oil from macauba pulp using alcoholic solvents

Pressurized liquid extraction of macauba pulp oil

Macauba ( Acrocomia aculeata ) pulp oil quality is negatively affected by drying fruits at 60 ºC

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