Stirling CBD Launches New Solventless CBD Extraction Method

Stirling CBD and its partners developed a new organic process of CBD extraction, The Cavitation Method.

Common Problems of Conventional Extraction Methods
The current extraction processes have four underlying problems that can hamper scaling and mass production:

  • Low Yield: Solvent-based (ethanol, CO2 and butane) methods wrestle with a low output, which means a lot of plant matter has to be used to extract the cannabinoids. Due to the low yield, these processes are expensive and often wasteful.

  • High Operation Cost: CO2 extraction is a method that relies on expensive specialized equipment and, as a result, is not as cost-effective when scaling up is a priority.

  • Contamination Risk: Extractions using solvents can expose the hemp biomass to dangerous chemicals, resulting in contamination without proper precautions. An example of possible contamination is via butane, which is toxic to humans and, if ingested, can cause lung complications.

  • Compromise on Purity: CO2 and BHO extracted products make it impossible to achieve 100% purity. Though organic methods can provide high CBD concentrations, the process involved is labor-intensive and not viable for production on a massive scale.

The Cavitation Method
After putting the hemp biomass in distilled ice water, cavitation mechanical force agitates the trichomes, causing them to burst and release the cannabinoid compounds. There is no risk of contamination since biomass does not interact with any chemicals and only uses water to extract. According to the company unlike most other methods, Cavitation produces large quantities of pure extract, making it perfect for large-scale production.

How is Cavitation Done?

1. Biomass Preparation: The process starts with pure hemp plant matter. Stirling uses hemp flowers and leaves, which are then finely chopped and placed inside a stainless steel tank.

2. Ice Water Submersion: The chopped biomass is submerged in ice water, solidifying the trichomes and making them easy to separate.

3. Cavitation Application: The biomass is blasted with billions of air bubbles using a specialized machine, and the pressure created causes the trichomes to come off.

4. Filtering the Biomass: The ice water and biomass mixture pass through a 40-micron filter. This filter separates the extracts from the other materials, including any unwanted plant matter, while preserving the cannabinoids, terpenes, and flavonoids. The result is a large amount of pure cannabinoid extract.

5. Extract Processing: The extract is processed to create products like CBD isolates, full spectrum, and broad spectrum variants. Cavitation makes it possible to harvest large amounts of any sub-compound, allowing the manufacturer to create multiple single compound-focused solutions.

Examples of such products include CDGA/CBDA gummies, full spectrum CBD oils, CBN gummies, and many more.

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Photo by Esteban Lopez on Unsplash

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