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Solvent Free Microwave Extraction The New Way to Extract Essential Oils

Solvent Free Microwave Extraction The New Way to Extract Essential Oils. Tim Michel Sales Manager Milestone Inc. Milestone Worldwide. Established in 1988 Headquarters in Italy, R&D and manufacturing in Germany Over 15,000 labs use Milestone instruments

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Solvent Free Microwave Extraction The New Way to Extract Essential Oils

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  1. Solvent Free Microwave ExtractionThe New Way to Extract Essential Oils Tim Michel Sales Manager Milestone Inc

  2. Milestone Worldwide • Established in 1988 • Headquarters in Italy, R&D and manufacturing in Germany • Over 15,000 labs use Milestone instruments • Core technology/application: microwave based sample prep Milestone HQ, Bergamo Italy Milestone apps lab, Bergamo Milestone R&D, Germany

  3. Milestone Product Range

  4. Milestone’s NEOS

  5. Today’s Agenda • What is Solvent Free Microwave Extraction (SFME)? • Benefits of SFME • Where does SFME technology fit best? • Other Application of the NEOS

  6. Traditional TechniquesEssential Oil Extraction • Cold Press • Hydro Distillation • Steam Distillation • Solvent Extraction

  7. Traditional TechniquesEssential Oil Extraction • Long Extraction Times • Poor Recovery • High Energy Consumed • Loss of Some Volatile Components • Thermal or Hydrolytic Degradation • Presence of Toxic Residues

  8. The “New” TechniqueSolvent Free Microwave Extraction (SFME) Advantages of SFME • Shorter Extraction Times • High Purity Extracts • No Solvents – Green Chemistry • Recovery of Volatile Compounds

  9. The “New” TechniqueSolvent Free Microwave Extraction (SFME) • Atmospheric Pressure with No Solvents • Heating of Internal Water • Essential Oils Evaporated by the In-situ Water • Cooling System Condenses the Vapors • Excess Water is Refluxed Back to the Extraction Vessel

  10. Shorter Extraction Times Extraction of Essential Oils from Aromatic Herbs* NEOS (SFME) Hydro Distillation Basil Garden Mint Thyme * Solvent-free microwave extraction of essential oils from aromatic herbs: comparison with conventional hydro-distillation. Journal of Chromatography A, 1043 (2004) 323-327.

  11. Shorter Extraction Times Extraction of Essential Oils from Orange Peel Hydro Distillation Cold Pressing NEOS * Solvent free microwave extraction of essential oils. Chemistry Today, Vol. 26 n.2 (2008)

  12. High Purity Extract • Oxygenated Compounds: More valuable as they are highly scented • Monoterpene Hydrocarbons: Less valuable to the fragrance of essential oil SFME has been shown to produce higher amounts of oxygenated compounds than Hydro-distillation.2 2. Solvent free microwave extraction of Elletaria cardamomum L.: A multivariate study of a new technique for the extraction of essential oil, Journal of Food Engineering, 79 (2007) 1079–1086

  13. Green Chemistry Carbon Emissions • “Regarding environmental impact, the calculated quantity of carbon dioxide rejected in the atmosphere is higher in the case of HD (3464 gCO2/g of essential oil) than for SFME (200 gCO2/g of essential oil).”1 No Solvent • The use of solvent for extractions generates waste into the environment. Also, no toxic residue from solvents will be present in extract. 1. An improved microwave Clevenger apparatus for distillation of essential oils from orange peel, Journal of Chromatography A, 1112 (2006) 121-126

  14. NEOS System • Solvent Free Microwave Extraction (SFME) • Laboratory of Chemistry of Natural Substances and Food Sciences at the Université de la Réunion, France • Partnership between Milestone and Laboratory, which lead to the grant European patents 1439218, 1618798 and 1629725.

  15. NEOS Hardware • Microwave • Control Panel • Glassware • Chiller

  16. Microwave • IR Sensor • Safety Micro Switches • Atmospheric Pressure • Polymer Coating • Microwave Power output of 800 watts

  17. Glassware • 2 L and 5 L Glass Module • Extension Tube • Connecting Glass Tube • Patented Extraction Module • Glass Condenser • Chiller

  18. Labs Benefited by the NEOS Research/Development Quality Control

  19. Flexibility of Applications • Microwave Hydrodiffusion and Gravity (MHG) • Microwave-Accelerated Steam Distillation (MASD) • Microwave-Accelerated Dean Stark (MADS) • Microwave Integrated Soxhlet (MIS)

  20. Microwave Hydrodiffusion and Gravity (MHG) • Higher Boiling Compounds • The NEOS-GR for MHG is the result between Milestone and the Université d’Avignon et des Pays de Vaucluse, France • Led to the grant of the European patent EP 1 955 749 A1 • An Original “Upside Down” Microwave Alembic

  21. What is Hydro Diffusion? • Hydrodiffusion is a type of Steam Distillation. • Steam comes from above sample with Hydrodiffusion compared to Steam Distillation where steam comes from below. • Less steam needed for the extraction, making the process quicker. • Hydrodiffusion is less harsh than Steam Distillation which improves the quality of the extract.

  22. Microwave Hydrodiffusion and Gravity (MHG) • Higher Boiling Compounds • No Solvent • Hydrodiffusion • Falls by Earth Gravity through Perforated Disc • Cooling System

  23. Benefits of MHG • Shorter Extraction Times • Recovery of Higher Boiling Compounds (pigments, flavonoids, carotenoids) • Higher Purity of Extracts • No Solvents

  24. MHG Extracts Extraction of Essential Oil from Rosmarinus officinalis

  25. Flexibility of Applications Microwave Accelerated Steam Distillation (MASD) • Steam Distillation most common technique • Sample sits above steam source generated by microwave heating • MASD was better than Steam Distillation in terms of Energy Saving, Rapidity (10 min vs 90 min), Product Yield, Cleanliness and Product Quality.* * F. Chemat, M.E. Lucchesi, J. Smadja, L. Favretto, G. Colnaghi, F. Visinoni, Microwave accelerated steam distillation of essential oil from lavender: rapid, clean and environmentally friendly approach. Analytica Chimica Acta, 2006, 555, 157-160.

  26. Microwave Accelerated Steam Distillation MASD SD * F. Chemat, M.E. Lucchesi, J. Smadja, L. Favretto, G. Colnaghi, F. Visinoni, Microwave accelerated steam distillation of essential oil from lavender: rapid, clean and environmentally friendly approach. Analytica Chimica Acta, 2006, 555, 157-160.

  27. Summary Advantages of SFME • Shorter Extraction Times • High Purity Extracts • No Solvents – Green Chemistry • Recovery of Volatile Compounds Labs Benefited by SFME • Research/Development • Quality Control • Universities Flexibility of NEOS • Microwave Hydrodiffusion and Gravity (MHG) • Microwave-Accelerated Steam Distillation (MASD) • Microwave-Accelerated Dean Stark (MADS) • Microwave Integrated Soxhlet (MIS)

  28. Thank You!

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