The alcohol extraction

Alcohol extraction is a popular method for extracting cannabinoids and terpenes from cannabis because it is relatively safe and effective. Here are detailed instructions for performing alcohol extraction:

Required materials and equipment

  1. Cannabis material : Dried and crushed flowers or trim.
  2. Ethanol (at least 95% purity) : High-proof alcohol, preferably food-grade.
  3. Extraction container : A glass or stainless steel container.
  4. Filter : Coffee filters or fine mesh sieves.
  5. Collection containers : Glass vessels for collecting the extracted oil.
  6. Double boiler or water bath : For gentle heating and evaporation of the ethanol.
  7. Stirring tool : stainless steel or silicone spatula.
  8. Protective equipment : gloves, safety goggles and, if necessary, a respirator.
  9. Ventilation : Well-ventilated room or extractor hood.

Step-by-step instructions

  1. Preparation of the cannabis material :
    • Dry and grind the cannabis material to maximize the surface area for extraction.
    • Make sure the material is free from mold and pests.
  2. Soaking the cannabis in ethanol :
    • Place the crushed cannabis material into the extraction container.
    • Pour enough ethanol over the cannabis to completely cover it.
    • Stir the mixture thoroughly for 3-5 minutes to dissolve the active ingredients.
  3. Filter the mixture :
    • Pour the ethanol-cannabis mixture through a filter into a clean collection container to remove the plant material.
    • Repeat the filtration process if necessary to remove all plant debris.
  4. Evaporation of ethanol :
    • Pour the filtered mixture into a double boiler or a water bath.
    • Gently heat the mixture to evaporate the ethanol. Be careful to keep the temperature below 78°C (ethanol's boiling point) to avoid damaging the active ingredients.
    • Work in a well-ventilated area and avoid open flames, as ethanol is highly flammable.
  5. Collecting and processing the extract :
    • Once the ethanol has completely evaporated, a thick, sticky oil remains.
    • Carefully scrape the oil out of the container and pour it into a clean glass jar.
    • Optional: For further purification and refinement, the extract can be treated by winterization and subsequent filtration.

Winterization (Optional)

  1. Mixing the extract with ethanol :
    • Dissolve the extracted oil in a small amount of ethanol and place the solution in the freezer for 24-48 hours.
  2. Filter the solution :
    • Filter the cold solution through a fine filter to remove waxes and lipids.
    • Evaporate the ethanol again as described above to obtain the purified oil.

Safety instructions

  • Solvent handling : Ethanol is highly flammable. Use in a well-ventilated area and avoid open flames and sparks.
  • Protective equipment : Wear gloves and safety goggles to avoid skin and eye irritation. A respirator may be useful to avoid inhaling vapors.
  • Temperature control : Monitor the temperature carefully to avoid overheating and destruction of the cannabinoids.

Conclusion

Alcohol extraction is an effective method for extracting cannabinoids and terpenes from cannabis. By carefully performing the process and following safety instructions, you can produce highly pure cannabis extracts. These extracts can then be further processed into tinctures, edibles, or other cannabis products.