Ultrasonic-Intensified Maceration for Flavor Extraction in Oils
Transform the traditional maceration of edible oils into a rapid, high-efficiency process. Unlike conventional cold infusion, which can take weeks to extract flavors, ultrasonic cavitation accelerates mass transfer to pull potent bioactive compounds and aromatic profiles from botanicals in minutes.
Who Benefits from Aromatization and Maceration by Sonication?
Ultrasonic-assisted maceration transforms weeks of cold infusion into minutes of high-yield, non-thermal processing, locking in full-spectrum aroma, antioxidants, and bioavailability without heat degradation.
Whether you are scaling up gourmet oil production, formulating clean-label cosmetics, or developing potent botanical extracts, sonication delivers consistent, scalable results while eliminating microbial risk and oxidative loss.
Who Benefits:
- Food & Beverage Manufacturers: Upgrade base oils into premium, antioxidant-rich gourmet oils with intense, full-spectrum flavor profiles in minutes instead of weeks.
- Cosmetics & Skincare Brands: Extract delicate, heat-sensitive botanical essences for natural oils, serums, and balms while preserving volatile compounds and active phytochemicals.
- Herbal Supplement & Botanical Extract Producers: Maximize the yield of polyphenols, essential oils, and oleoresins for functional foods and dietary supplements with solvent-free, non-thermal processing.
- Craft Beverages & Liqueur Makers: Achieve rapid, uniform infusion of fresh botanicals into spirits, tinctures, and vinegars while preventing oxidative degradation and microbial spoilage.
Ultrasonic extractor UIP4000hdT for maceration and aromatisation of edible oils
Production of Premium Infused Oils via Ultrasonic Extraction
As a non-thermal process, sonication is the ideal solution for high-value carrier oils (such as extra virgin olive, avocado, and seed oils). It preserves heat-sensitive volatiles, polyphenols, and essential oils that are often lost during thermal processing, resulting in a gourmet product with superior aroma, enhanced shelf-life stability, and improved bioavailability.
Ultrasonic Maceration and Aromatisation
Ultrasonic infusion accelerates the release of phytochemicals and flavor compounds from botanicals (herbs, spices, fruits) directly into edible oils. Due to the intense ultrasonic cavitation effects, bioactive compounds are homogeneously dispersed into the oil matrix. This improves the product’s consistency and significantly enhances the bioavailability of health-promoting compounds, as the oil efficiently solubilizes these lipophilic substances.
Ultrasonic Maceration vs Traditional Methods
Traditional maceration is a passive “cold” infusion process. Plant material is suspended in a solvent and left to sit, allowing delicate, volatile essences to release naturally over a period ranging from several weeks to months. While this avoids heat damage, the process is slow and the quality is often compromised by oxidation.
Watch the Comparison: Ultrasonic Extraction vs. Conventional Maceration
The video below demonstrates the superiority of sonication comparing ultrasonic and conventional extraction of fresh ribwort leaves in water: while conventional maceration requires 20 days to achieve a potent extract (often resulting in a brownish hue indicative of oxidative degradation), ultrasonic extraction produces a deep green, high-quality extract in mere seconds.
The deep green color of the ultrasonic ribwort extract highlights the superior efficiency of ultrasonic technology in producing a full-spectrum extract. Ultrasonic botanical extraction is faster, more potent, and more efficient. The high efficient ultrasonic extraction with the UP200Ht produces a full-spectrum ribwort extract.
The deep green color of the ultrasonic ribwort extract highlights the superior efficiency of ultrasonic technology in producing a full-spectrum extract. Ultrasonic botanical extraction is faster, more potent, and more efficient. The high efficient ultrasonic extraction with the UP200Ht produces a full-spectrum ribwort extract.
How Does Sonication Intensify Maceration?
Ultrasonication intensifies the maceration step significantly by applying intense micromixing and turbulences to the maceration mixture. Sonication can accelerate the traditional maceration, which takes weeks or months, drastically – achieving the same results of flavor infusion within a few minutes. As a non-thermal, mechanical method, ultrasonic maceration increases the mass transfer and preserves the heat-labil bioactive compounds such as volatiles, polyphenols and other phytochemicals. This makes ultrasonic maceration a unique technique for a rapid, effective production of high-quality macerates.
Another advantage of ultrasonic maceration is the use of fresh plant material. In traditional maceration, fresh material can be used but is prone to microbial spoilage, since the botanical material must remain for very long periods in the oil. Ultrasonic maceration is a rapid process of several minutes, which means there is no long period for microbial growth. Furthermore, ultrasonic cavitation is well-known to disrupt and inactivate microbial cells and contributes thereby to the macerate’s stability.
Ultrasonically aromatised oils such as extra virgin olive oil or sunflower oil have been shown a higher stability as the added antioxidants from the herbs reduce the primary oxidation of fatty acids. Oregano, thyme, hot chili pepper, garlic, laurel, basil, olive leaves, sage, ribwort, lavender, rosemary, menthe, lemon, orange as well as other fruits, leaves, flowers, roots, seeds and bark are rich in essential oils, polyphenols, flavonoids and other bioactive compounds. Ultrasonic maceration and aromatisation is a effective, rapid and safe method to upgrade edible oils, giving them a higher antioxidant and polyphenol content, improved oxidation stability and a rich flavor profile.
- Complete flavor extraction
- Rapid process
- Non-thermal, mild process
- Solvent-free
Flavoring and aromatising edible oils by ultrasonic maceration is a potent and rapid process to upgrade oils and produce so-called “gourmet oils”. With an broader range of flavors, ultrasonic aromatisation adds further value to oil products.
The UIP1000hdT is a 1000 watts powerful probe-type sonicator commonly used for flavor extraction
Industrial Ultrasonicators for Vegetable Oil Processing
High-power ultrasonic processors are already widely used in the food industry to extract flavors and bioactive compounds, to emulsify oils with water-based liquids, or to homogenize various materials. For flavored edible oils, the ultrasound-assisted extraction allows for the production of high quality oils with a intense, full flavor profile. At the same time, ultrasonic maceration and aromatization convinces as a fast, convenient, safe, and cost-effective method.
For ultrasonically-assisted maceration, flavor extraction and aromatisation, whole spices (i.e. leaves, flowers, seeds, bark etc.), ground spices (i.e. powder), essential oils or oleoresin can be used.
Hielscher Ultrasonics manufactures high-performance ultrasonicators from lab and bench-top to full-industrial scale with the processing capacity of several tons per hour.
The table below gives you an indication of the approximate processing capacity of our ultrasonicators:
| Batch Volume | Flow Rate | Recommended Devices |
|---|---|---|
| 1 to 500mL | 10 to 200mL/min | UP100H |
| 10 to 2000mL | 20 to 400mL/min | UP200Ht, UP400St |
| 0.1 to 20L | 0.2 to 4L/min | UIP2000hdT |
| 10 to 100L | 2 to 10L/min | UIP4000hdT |
| n.a. | 10 to 100L/min | UIP16000 |
| n.a. | larger | cluster of UIP16000hdT |
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Literature/References
- Manganiello R., Pagano M., Nucciarelli D., Ciccoritti R., Tomasone R., Di Serio M.G., Giansante L., Del Re P., Servili M., Veneziani G. (2021): Effects of Ultrasound Technology on the Qualitative Properties of Italian Extra Virgin Olive Oil. Foods. 2021 Nov 22;10(11):2884.
- Maarit J. Rein, Mathieu Renouf, Cristina Cruz‐Hernandez, Lucas Actis‐Goretta, Sagar K. Thakkar, Marcia da Silva Pinto (2013): Bioavailability of bioactive food compounds: a challenging journey to bioefficacy. British Journal of Clinical Pharmacology 2013 Mar; 75(3): 588–602.
- Petigny L., Périno-Issartier S., Wajsman J., Chemat F. (2013): Batch and Continuous Ultrasound Assisted Extraction of Boldo Leaves (Peumus boldus Mol.). International journal of Molecular Science 14, 2013. 5750-5764.
- Sánchez-Hernández E., Balduque-Gil J., González-García V., Barriuso-Vargas J.J., Casanova-Gascón J., Martín-Gil J., Martín-Ramos P. (2023): Phytochemical Profiling of Sambucus nigra L. Flower and Leaf Extracts and Their Antimicrobial Potential against Almond Tree Pathogens. International Journal of Molecular Sciences, 2023.
- Turrini, Federica; Donno, Dario; Beccaro, Gabriele; Zunin, Paola; Pittaluga, Anna; Boggia, Raffaella (2019): Pulsed Ultrasound-Assisted Extraction as an Alternative Method to Conventional Maceration for the Extraction of the Polyphenolic Fraction of Ribes nigrum Buds: A New Category of Food Supplements Proposed by The FINNOVER Project. Foods. 8. 466; 2019
- Antonia Tamborrino, Agnese Taticchi, Roberto Romaniello, Claudio Perone, Sonia Esposto, Alessandro Leone, Maurizio Servili (2021): Assessment of the olive oil extraction plant layout implementing a high-power ultrasound machine. Ultrasonics Sonochemistry, Volume 73, 2021.
Frequently Asked Questions About Ultrasonic Maceration & Aromatisation
What is ultrasonic maceration, and how does it differ from traditional maceration?
Ultrasonic maceration (also known as ultrasound-assisted extraction) is a process intensification technique that uses high-intensity sound waves to accelerate the extraction of flavor compounds, essential oils, and bioactive phytochemicals from botanicals into a solvent, such as edible oil. Unlike traditional cold maceration, which relies on slow diffusion and can take weeks or months, ultrasonic cavitation rapidly disrupts plant cell walls. This releases compounds in minutes or hours, resulting in a significantly faster process, higher yield, and a more potent extract.
What are the main advantages of using sonication for flavoring and aromatizing edible oils?
Ultrasonic aromatization offers several key benefits for oil producers:
- Rapid Processing: Reduces infusion times from weeks to minutes.
- Non-Thermal & Solvent-Free: Preserves heat-sensitive volatile compounds and delicate flavors without using harmful solvents.
- Higher Yield & Bioavailability: Maximizes the extraction of polyphenols, antioxidants, and essential oils, ensuring they are evenly dispersed in the oil matrix for better absorption.
- Improved Stability: The extracted natural antioxidants from botanicals (like rosemary or thyme) help prevent the primary oxidation of fatty acids, extending the shelf-life of the oil.
- Microbial Safety: The rapid process minimizes the risk of microbial spoilage, and ultrasonic cavitation can help inactivate certain microbial cells.
Which types of edible oils and botanicals work best with ultrasonic maceration?
Ultrasonic maceration is highly versatile and works with almost any edible carrier oil, including extra virgin olive oil, avocado oil, sunflower seed oil, rapeseed (canola) oil, and coconut oil. A wide range of botanicals can be infused, such as basil, rosemary, thyme, chili peppers, garlic, lavender, elderflower, citrus fruits, and various spices. Both fresh and dried plant materials, as well as powders and oleoresins, can be used effectively.
Is ultrasonic maceration a non-thermal process? Why is this important?
Yes, ultrasonic maceration is considered a non-thermal or “cold” processing method. While the process itself can generate slight localized heat due to acoustic energy, it is carefully controlled to remain low overall, preventing the thermal degradation of delicate compounds. This is crucial for extracting volatile aromas, essential oils, and heat-labile bioactive compounds (like certain vitamins and antioxidants) that would otherwise be destroyed or evaporated using traditional heat-based extraction methods.
How does ultrasonic maceration improve the stability and shelf-life of infused oils?
Beyond simply infusing flavor, ultrasonic maceration extracts natural antioxidant-rich compounds (such as polyphenols and flavonoids) from botanicals like rosemary, oregano, and olive leaves directly into the oil. These antioxidants act as natural preservatives by neutralizing free radicals and significantly reducing the primary oxidation of the oil’s fatty acids, thereby enhancing the oil’s oxidative stability and extending its shelf-life.
Can ultrasonic maceration be scaled from laboratory to full industrial production?
Absolutely. Ultrasonic extraction technology is fully scalable. Hielscher Ultrasonics provides a complete range of ultrasonicators, from compact laboratory units (e.g., UP100H) for R&D and small batches, to pilot systems (e.g., UIP2000hdT), and robust inline industrial processors (e.g., UIP4000hdT, UIP16000) capable of processing several tons of oil per hour. This allows for seamless technology transfer and consistent results from the lab bench to full-scale manufacturing.
Is it safe to use ultrasonic maceration for producing gourmet or “cold-infused” oils for food consumption?
Yes, it is a safe and widely adopted method in the food industry. Because the process is solvent-free and non-thermal, it complies with clean-label standards. The extracted botanicals and resulting infused oils retain their natural, food-grade properties. Ultrasonicators used in food processing are designed with hygienic components (often using food-grade stainless steel) and can be easily cleaned and sanitized to meet strict food safety regulations.
What is maceration?
The traditional maceration process, by which oils such as olive or sunflower oil are infused with the aromatic compounds and essential oils of botanicals (e.g. spices, herbs, fruits etc.), is an infusion process, which works by soaking the plant material in the oil. This is a very slow process, which takes from several weeks up to a few months, since the mass transfer between the botanical solids and the oil is slow. Another factor, which is responsible for the slowness of traditional maceration, is the temperature during maceration. As a cold infusion, the suspension of botanical and oil is kept at room temperature in order to prevent the sensitive volatile compounds, oleoresins and essential oils from thermal degradation. These factors slow the process and make it very time-consuming.
The maceration process can be used to infuse edible oils, as well as oils and tinctures for skincare, medicinal tinctures and alcoholic beverages. Common herbs and spices used for the maceration of oils and tinctures include mint, basil, chilis, rosemary, thyme, vanilla, cinnamon, lavender, elderflower, calendula, St. John’s Wort, sea buckthorn and many others.
Common oils for maceration are olive, sunflower seed, coconut, jojoba, rapeseed, flaxseed or hemp oil. To prepare tinctures or alcoholic beverages, alcohol is used as liquid.
What are essential oils?
An essential oil is a concentrated hydrophobic liquid containing volatile chemical compounds from botanicals. Essential oils are also known as volatile oils, ethereal oils, aetherolea. Essential oils are often referred to as the oil of the plant extracted from, such as rose oil, teatree oils, or bergamotte oil. Essential oils are termed “essential” because they contain the “essence of” the plant’s fragrance. When used for essential oils, the term “essential” does not mean that the oil is an indispensable compoud, as with the terms essential amino acid or essential fatty acid, which are so called because they are nutritionally required by a given living organism. Essential oils are produced by distillation, hydrodistillation, solvent extraction or pressing. Ultrasonic processing is often used to intensify and accelerate the extraction rate and increase the essential oil yield.
Read more about ultrasonic hydrodistillation of essential oils!
What are oleoresins?
Oleoresins are a natural combination of oil and resin in plants. Being a highly concentrated substance, oleoresins are semi-solid extracts composed of a resin in solution in an essential and/or fatty oil (trigylcerides).
In contrast to essential oils, oleoresins are plentiful in heavier, less volatile and lipophilic compounds, such as resins, waxes, fats and fatty oils.
Oleoresins can be prepared from spices, such as basil, capsicum, cardamom, celery seed, cinnamon bark, clove bud, fenugreek, fir balsam, ginger, jambu, labdanum, mace, marjoram, nutmeg, parsley, pepper (black/white), pimenta (allspice), rosemary, sage, savory, thyme, turmeric, vanilla, West Indian bay leaves. The solvents used are nonaqueous and can be either polar (i.e. alcohols) or nonpolar (i.e. hydrocarbons, carbon dioxide). Ultrasonic extraction method is compatible with those solvents and accelerates the extraction rate and yield.
Both, essential oils and oleoresins are excellent natural substances, which can be added as concentrated flavor ingredient to various foods and beverages. Essential oils and oleoresins are isolated from plants via extraction (e.g. ultrasonically assisted extraction) and subsequent distillation. Herbs, spices and other botanicals are used as raw materials for the production of essential oils and oleoresins.