Crambe seed oil: Extraction and reaction with dimethyl carbonate under pressurized conditions

Trentini, Caroline Portilho; Mello, Bruna Tais Ferreira de; Cabral, Vladimir Ferreira; Silva, Camila da

doi:10.1016/j.supflu.2020.104780

Cited by 11 publications

(2 citation statements)

References 78 publications

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“…Γ-tocopherol was predominant in the analyzed oil, representing ~55% of the identified tocopherols, followed by α-and δtocopherol. Total tocopherol contents ranged from 30.89 to 38.60 mg 100 g −1 according to each treatment, values higher than that reported by Trentini, Mello, Cabral, and Silva (2020), who obtained 21.24 mg 100 g −1 oil using the conventional extraction method and seeds of the same cultivar. Phytosterols and tocopherols are important natural lipid-soluble antioxidants.…”

Section: Resultscontrasting

confidence: 69%

Oil from crambe seeds treated with different resistance inducers: Oil yield and chemical characterization

Silva,

Stevanato,

Raspe

et al. 2024

Acta Sci. Agron.

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This study aimed to carry out the extraction and chemical characterization of oil from crambe treated with resistance inducers during its cultivation to promote greater efficiency in the defense system of plants. For this purpose, Agromos® and Ecolife® inducers were applied at rates of 0.5 and 1.0 L hectare−1 during crambe cultivation. Crambe seed oil was obtained in a Soxhlet extractor using n-hexane as a solvent and the oils were characterized in terms of fatty acid composition and minority compound contents (phytosterol and tocopherol). The oil obtained from seeds without the application of inducers (control) was also characterized. We determine the oxidative stability of oils with inducer application that presented higher minority compound contents. Crambe seeds that received the treatment with the Agromos® resistance inducer had higher oil content. However, in general, the fatty acid profile of the obtained oils was similar and showed a predominance of erucic and oleic acids (which represent ~82% of the composition). The application of the Agromos® inducer allowed obtaining seeds that provided oil with higher contents of phytosterols and tocopherols and higher oxidative stability.

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Section: Resultscontrasting

confidence: 69%

Oil from crambe seeds treated with different resistance inducers: Oil yield and chemical characterization

Silva,

Stevanato,

Raspe

et al. 2024

Acta Sci. Agron.

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“…Several recent studies have investigated the viability of interesterification as an alternative to typical transesterification reactions, focusing on different reaction parameters [12,19]. These studies include a variety of catalytic systems, including homogeneous [20], heterogeneous [21], and enzymatic techniques [12], as well as non-catalytic systems [22]. Most of the published research has focused on homogeneous catalysts, which are known for their simplicity and cost-effectiveness in terms of materials and operation [12].…”

Section: Introductionmentioning

confidence: 99%

Glycerol-Free Biodiesel via Catalytic Interesterification: A Pathway to a NetZero Biodiesel Industry

Youssef,

Khaled,

Aboelazayem

et al. 2024

Sustainability

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Conventional biodiesel manufacturing uses alcohol as an acyl acceptor, resulting in glycerol as a side product. The increased demand for biodiesel has led to the production of a substantial surplus of glycerol, exceeding the market need. Consequently, glycerol is now being regarded as a byproduct, and in some cases, even as waste. The present study aims to suggest an economically viable and ecologically friendly approach for maintaining the viability of the biodiesel sector. This involves generating an alternative byproduct of higher value, rather than glycerol. Triacetin is produced through the interesterification of triglycerides with methyl acetate, and is a beneficial ingredient to biodiesel, reducing the need for extensive product separation. The primary objective of this research is to improve the interesterification reaction by optimising process parameters to maximise biodiesel production while using sulphuric acid as an economically viable catalyst. The study utilised the Box–Behnken design (BBD) to investigate the influence of various process variables on biodiesel yield, such as reaction time, methyl acetate to oil molar ratio, and catalyst concentration. An optimisation study using Response Surface Methodology (RSM) focused on key process reaction parameters, including the methyl acetate to oil (MA:O) molar ratio, catalyst concentration, and residence time. The best conditions produced a biodiesel blend with a 142% yield at a 12:1 MA:O molar ratio, with 0.1 wt% of catalyst loading within 1.7 h. The established technique is deemed to be undeniably effective, resulting in an efficient biodiesel production process.

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Epoxidation of crambe seed oil with peracetic acid formed in situ

Iwassa

Saldaña

Cardozo‐Filho

et al. 2022

J Americ Oil Chem Soc

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This study investigated the epoxidation of crambe seed oil (CSO) using peracetic acid formed in situ during the reaction process. First, a preliminary study of the main operational variables was carried out. Then, the kinetic behavior of the reaction was verified, evaluating the effect of the molar ratio of hydrogen peroxide to ethylenic unsaturation, catalyst percentage and temperature. The results indicate that the smallest amount of hydrogen peroxide (1.1 mol mol À1 ) favors the relative conversion to oxygen oxirane (RCO) and that an increase in the catalyst percentage up to 2.4 wt% intensifies the reaction, maintaining the stability of the process. In addition, the reaction carried out at high temperatures results in greater conversions in short time, however, it is necessary that the reaction is stopped at the exact time, avoiding exceeding the formation of epoxy resulting in the obtaining of by-products. Some unsaturated fatty acids are partially consumed while others (linolenic and gondoic acid) are completely consumed during the entire reaction. The epoxidized oils showed higher viscosities in relation to the CSO. The FTIR spectra indicated the appearance of the epoxide group and the analysis by gas chromatography coupled to a mass spectrometer indicated the formation of two epoxidized compounds, 3-octyl oxirane octanoic acid and 10-oxo-octadecanoic acid methyl ester. The highest efficiency for the formation of CSO epoxides, within the ranges of the variables evaluated, was observed at 80 C, 8 h reaction, using a H 2 O 2 to C C molar ratio of 1.1 mol mol À1 and 2.4 wt% H 2 SO 4 .

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Crambe seed oil: Extraction and reaction with dimethyl carbonate under pressurized conditions

Cited by 11 publications

References 78 publications

Oil from crambe seeds treated with different resistance inducers: Oil yield and chemical characterization

Oil from crambe seeds treated with different resistance inducers: Oil yield and chemical characterization

Glycerol-Free Biodiesel via Catalytic Interesterification: A Pathway to a NetZero Biodiesel Industry

Epoxidation of crambe seed oil with peracetic acid formed in situ

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