scholarly journals Effects of Modifier Polarity on Extraction of Limonene from Citrus Sinensis L. Osbeck Using Supercritical Carbon Dioxide

2014 ◽  
Vol 8 (2) ◽  
Author(s):  
Azreen Ibrahim ◽  
Rosalam Sarbatly
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Essential Oil ◽  
Citrus Sinensis ◽  
Orange Peel ◽  
Aroma Compounds ◽  
Polar Compound ◽  
Optimum Conditions ◽  
Poor Solvent ◽  
Supercritical Carbon

Limonene constitutes 98% of the essential oil obtained from orange peel. Besides being used as fragrances and flavours in the food, perfume and cosmetic industries, limonene is also a good degreasing agent. Supercritical carbon dioxide is an excellent solvent for non-polar compound like limonene but poor solvent for polar compound like α-terpineol. Common practice in supercritical fluid extraction is to change the polarity of supercritical carbon dioxide by employing polar modifiers to increase its solvating power towards polar analytes. Base on this, in the attempt to extract more limonene in orange essential oil, less polar modifiers were added instead. In this study, effects of adding modifiers with different polarity on extraction of aroma compounds (limonene, linalool and α-terpineol) from Citrus Sinensis L. Osbeck or sweet orange peel were investigated. Supercritical extraction was carried out at defined pressure and temperature for duration of 45 minutes. Concentration of aroma compounds extracted was analysed using GC-MS. The optimum conditions for extraction were observed at 318K and 12MPa. The concentrations of limonene increased significantly by the addition of methanol and slightly with n-heptane. It was also found that n-heptane is effective on supercritical CO2 extractions of linalool and α-terpineol.

scholarly journals RECEIVING OIL FROM CLOUDBERRIES FRUITS BY SUPERCRITICAL CARBON DIOXIDE EXTRACTION

2018 ◽  
pp. 91-97
Author(s):  
Artyom Dmitrievich Ivakhnov ◽  
Kristina Sergeevna Sadkova ◽  
Alina Sergeyevna Sobashnikova ◽  
Tat'yana Eduardovna Skrebets ◽  
Mikhail Vladislavovich Bogdanov
Keyword(s):  
Carbon Dioxide ◽  
Fatty Acids ◽  
Supercritical Carbon Dioxide ◽  
Unsaturated Fatty Acids ◽  
Optimum Conditions ◽  
Hexane Extraction ◽  
Rubus Chamaemorus ◽  
The Difference ◽  
Key Indicators ◽  
Supercritical Carbon

Comparative researches of ways of oil extraction from the fulfilled fruits of cloudberries (Rubus chamaemorus) with application of hexane and supercritical carbon dioxide as solvents are executed. Optimization is performed and optimum conditions of supercritical fluid extraction of oil are defined with use of central composite design of 2nd order. Pressure of carbon dioxide of 350 atm, temperature 85 °C, duration of extraction of 80 min are the optimum conditions of carrying out of the process. The yield of oil is 9.0%. Quality key indicators of the received oil were defined. The difference between the oil received by the SKF-CO2 method and the oil received by hexane extraction consists in improvement of organoleptic properties, the raised share of the combined fatty acids at decrease of a share of the free acids and high content of unsaturated fatty acids. It is shown that supercritical carbon dioxide can be an alternative to the hydrocarbons which are traditionally used for these purposes.

scholarly journals Comparison of Eucalyptus cinerea Essential Oils Produced by Hydrodistillation and Supercritical Carbon Dioxide Extraction

2011 ◽  
Vol 6 (1) ◽  
pp. 1934578X1100600
Author(s):  
Tavleen S. Mann ◽  
Garikapati D. Kiran Babu ◽  
Shailja Guleria ◽  
Bikram Singh
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Essential Oil ◽  
Major Constituent ◽  
Volatile Fraction ◽  
Eucalyptus Species ◽  
Supercritical Carbon Dioxide Extraction ◽  
Significant Difference ◽  
Carbon Dioxide Extraction ◽  
Supercritical Carbon

The essential oil of Eucalyptus cinerea is reported to possess a higher 1,8-cineole content than other Eucalyptus species. Variations in the quantitative and qualitative characteristics of E. cinerea oil produced by hydrodistillation (HD) and supercritical carbon dioxide extraction (SCE) techniques and a comparison between glycoside-bound and free volatile constituents produced by HD have been studied. It was found that HD produced higher oil (free volatiles) content (3.1%) as compared with SCE (1.1%), whereas bound volatiles constituted only about 0.4%. Gas chromatographic (GC) analysis of the oil samples revealed significant difference in their chemical composition. The essential oil (free volatiles) produced by HD contained 1,8-cineole (85.1%) as the major constituent, followed by α-terpineol (7.2%) and limonene (4.4%). In the bound volatile fraction produced by HD, 1,8 cineole (20.6%), α-terpineol (7.6%), p-cymene (6.3%), and limonene (4.5%) were found as major constituents. The extract produced by SCE was dominated by 1,8-cineole (70.4%), α-terpineol (8.6%), globulol (3.1%), aromadendrene (2%), citronellal (1.7%), viridiflorol (1.3%), phytol (1.1%) and terpinen-4-ol (1%). Although HD produced higher oil yields, SCE produced better extract in terms of the number of components detected.

scholarly journals Optimization of the Supercritical Carbon Dioxide Separation of Bergapten from Bergamot Essential Oil

2018 ◽  
Vol 101 (1) ◽  
pp. 293-297 ◽  
Author(s):  
Vincenzo Sicari
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Essential Oil ◽  
Volatile Fraction ◽  
Carbon Dioxide Separation ◽  
Fractionation Tower ◽  
Post Process ◽  
Bergamot Oil ◽  
Cold Pressed ◽  
Supercritical Carbon

Abstract The possibility of following traditional cold-press extraction with the post process continuous separation of bergapten from bergamot essential oil was investigated. A fractionation tower was used in an experiment in which cold-pressed bergamot oil was extracted in a continuous countercurrent process by supercritical carbon dioxide under different conditions. Bergapten is fairly soluble in CO2 in its supercritical phase, in particular at a density of 277.90 kg⋅m–3, corresponding to a pressure of 8 MPa and temperature of 40°C. Under these conditions, an extract with 0.198% bergapten was obtained, a figure slightly below the percentage of bergapten contained in cold-pressed oil (0.21%). However, at densities below 200 kg⋅m–3, the amount of bergapten in the extracted oil was negligible. Of all tested conditions for separation, the best was found to be at a pressure of 8 MPa and temperature of 70°C, conditions under which bergapten was not detected. The results of the experiment showed that bergapten, and the non-volatile fraction in general, was extracted only in small quantities and was not extracted at all with at a CO2 pressure of 8 MPa.

Extraction ofJuniperus communis L. ssp.nana Willd. essential oil by supercritical carbon dioxide

2005 ◽  
Vol 21 (1) ◽  
pp. 148-154 ◽  
Author(s):  
Bruno Marongiu ◽  
Silvia Porcedda ◽  
Alessandra Piras ◽  
Giuseppina Sanna ◽  
Marta Murreddu ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Supercritical Carbon Dioxide ◽  
Essential Oil ◽  
Supercritical Carbon
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