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Redfood24 Blog - CBD & Food Supplements
Blog article:
Extracting CBD oil through CO₂ extraction – simply explained
Table of Contents
In the ever-growing world of CBD products, extraction of cannabidiol (CBD) The focus of many discussions. A particularly efficient and high-quality approach is the CO2 extractionBut what exactly does this mean and how is CBD oil produced through this process?
What is CO2 extraction?
CO2 extraction is a highly specialized process based on the principles of pressure and temperature. Carbon dioxide, normally in a gaseous state, is converted to a supercritical state under increased pressure and controlled temperatures. In this supercritical state, CO2 exhibits both gaseous and liquid properties, making it an ideal solvent for extraction.
The process in detail
- Extraction unit: The process begins in an extraction unit where supercritical CO2 acts as a solvent. This CO2 then passes through a special chamber where it comes into contact with the plant raw materials.
- Solvent contact: The supercritical CO2 penetrates the plant materials and dissolves the desired compounds, including cannabinoids, terpenes and flavonoidsThis extracts a wide range of active ingredients, which contributes to the production of full-spectrum CBD oil.
- Disconnection: After extraction, the CO2 is passed into a separate container where the pressure is reduced. This causes the CO2 to evaporate while the extracted compounds remain as a concentrated extract.
- CO2 recovery: The recovered CO2 can be reused, making the process sustainable and helping to reduce environmental impacts.
Advantages of CO2 extraction
- Precise control: The process allows precise control of pressure and temperature, resulting in targeted extraction of the desired compounds.
- Purity of the final product: Since CO2 is a non-toxic solvent, the final product remains free of residues and contaminants, which improves the quality of the CBD oil.
- Gentler for plant substances: Compared to other extraction methods, the delicate plant compounds are less stressed during the CO2 extraction process, thus better preserving their integrity.
CO2 extraction has established itself as one of the most advanced methods of CBD extraction. Its ability to deliver high-quality and pure extracts makes it a preferred choice for manufacturers who focus on quality and sustainability.
Critical and Non-Critical CO2 Extraction: Fine Points of the Extraction Process
CO2 extraction can be divided into critical and non-critical phases, with both approaches having their own advantages and applications. The differences lie mainly in the temperatures and pressures used during the extraction process.
Critical CO2 extraction:
The critical CO2 extraction takes place at higher temperatures and pressures, which are above the so-called critical point for carbon dioxide. This critical point is around 31 degrees Celsius and 74 bar pressure. During this phase, CO2 exhibits both gaseous and liquid properties, making it an efficient solvent.
- Advantages:
- Faster extraction: The higher temperatures speed up the extraction process.
- Efficient separation: The higher pressures enable more precise separation of the desired compounds.
- Applications:
- Suitable for the extraction of larger quantities of raw materials.
- Common in commercial applications due to higher efficiency.
Non-critical CO2 extraction:
In contrast, non-critical CO2 extraction occurs at lower temperatures and pressures, below the critical point. Although this process takes longer, it offers some specific advantages.
- Advantages:
- Gentler for sensitive compounds: The lower temperatures are gentler on sensitive cannabinoids and terpenes.
- Less energy consumption: The process requires less energy, which contributes to more sustainable production.
- Applications:
- Ideal for the extraction of sensitive compounds to maintain the quality of the final product.
- Often used in the production of high-quality but smaller batches for the demanding consumer market.
The art of selection:
The decision between critical and non-critical CO2 extraction depends on several factors, including the type of plant material, desired end product characteristics, and economic considerations. Manufacturers choose the method according to their goals, whether that's mass production of CBD extracts or focusing on high-quality, gentle extractions.