CBD Crystals Recipe
CBD Crystal Creation guide
This process requires technologically advanced and often very expensive equipment that is beyond the reach or skill level of the average person.
This guide is meant to be supplemental to manufacturers of CBD concentrates who already have a basic understanding of this type of process.
Solvents like Pentane and Butane pose explosion, fire, and other risks and should not be handled by a novice.
In order to create CBD crystals, one must first start with extracted CBD oil that has been distilled. The CBD oil mixture will also need to have been winterized.
If you are not already aware, winterization is an oil refinement technique commonly used in biotechnology.
The process involves dissolving the extract in ethanol, then placing the mixture in a freezer to chill. Typically the end result should be a clear mixture. If the mixture is cloudy, that indicates the presence of contaminants.
If that is the case, one can attempt the winterization process again until the mixture becomes completely clear. Failing to use a clear mixture for the crystals can result in a poor quality product.
Step By Step Guide
Dissolving CBD Oil
Disclaimer: Pentane can be dangerous. Use extreme caution and always use safety equipment when working with solvents. Consult a safety officer before use.
For this step, a glass jacketed receptacle with a heating bath and automatic stirring device is required.
Step 1: Dissolve the clear CBD oil in pentane.
Make sure the glass jacketed receptacle has a vent or a condenser that is connected to a blower motor or fume hood for pentane vapors.
Pentane WILL release harmful vapors when heated. Use extreme caution and take all proper precautions to ensure these fumes are not inhaled and are properly ventilated.
Make sure the receptacle condenser is cooled to -20 °C. Generally you can add one part pentane to three parts CBD oil. Some oils will require a different ratio of pentane to oil.
Next, turn on stirring device and the heating bath and set it to 45 °C. Wait until the solution reaches 45 °C and the oil has been fully dissolved.
Step 2: Precipitation
Set the bath to 5 °C and reduce the stirring speed. As the solution cools it will become more viscous. Adjust the stirrer to keep the RPM above 120. CBD crystals will spontaneously form out of the pentane solution.
Step 3: Collect CBD Crystals
When it is obvious that no more crystals are going to form, physically remove the CBD crystals. Then, vacuum filter the crystals to remove any excess fluid. Finally, rinse the crystals with ice-cold pentane.
This will cleanse impurities from the crystal surfaces, but be advised that while more rinses with pentane can improve crystal color, this will cause you to lose some of the crystal’s mass.
Note: CBD crystals can be redissolved and then recrystallized to improve the potency even further.
It is possible to crystallize CBD from low purity crude or poorly refined oil. However, low starting purity will reduce both yield and purity of the crystallized CBD.
The lower purity CBD isolate will have more color, smell, and THC content than if you used distillate. This will cause you to need a re-crystallization step, which is not the end of the world, but does have a real cost.
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NOTES FROM THE AUTHOR
Compliance Director at Cannabidiol Life
CBD crystal creation is a delicate process and this guide is intedned to be supplemental knowledge for experienced professionals only. Please take care to ensure all proper safety equipment and precautions are used when creating CBD crystals.