Step 2 - Silting
Step 2 - Silting
Silting is a term coined to describe a unique way of clarifying the wash of semi-polar compounds. Phospholipids, denatured proteins and water soluble compounds are the unnamed contaminates in RSO that have not been discussed in detail before. The Silting step is a modification of what the food industry does to refine cooking oils. Here is a simplied form of Chemical Degumming that removes these unwanted phosopholipids (gums) and water soluble compounds prior to distillation.
Note: Phospholipids make up the cell membranes of Trichomes, the little chemical factories that produce THC, CBD and the myriad of other cannabinoids. Using an alcohol solvent, Ethanol or Isopropyl, will dissolve phosophlipids in order to access the cannabis oils. Using a cold or frozen wash does not eliminate phospholipids from the wash, you still need to deal with phospholipids somewhere in your refinement process.
There are two forms of phospholipids to be removed - Hydra-table and Non-Hydra-table. Hydra-table phospholipids are hydrophilic, meaning the material gums up with water. Non-hydra-table phospholipids are stubborn, needing to be dissolved with acid. Fortunately, a small amount of Lime Juice was found to dissolve these lipids. With that, here is how Silting works -
An amazing discovery was made in separating these heavier compounds out of the wash. Just by pouring in saturated salt water into the Isopropyl wash, phospholipids and other water soluble compounds immediately fall out. This is know as "Salting-Out" Isopropyl, a common high school chemistry experiment. Brine now becomes our most power tool for removing the trash from the oil.
Here’s what you may see depending on the amount of phospholipids in the wash and anti-caking compounds in the salt. The final density of the gunk is determined by the quality of the extracted material. Some washes will be thick, some thin, your mileage may vary.
Procedure for Water Degumming
Science - Degumming studies
Tips and Tools
Tip: Use anti-caking free, non-iodine salt. Anti-caking material may add to the source of the Snow Globe effect. Pickling and Kosher salts are available without anti-caking compounds.
WARNING: Never distill alcohol near open flame. Alcohol vapors are highly flammable so always distill in well ventilated spaces.
This oil is appropriate for oral ingesting and vaping. Due to the potential of residual salts, do not torch this oil. Torch temperatures can reach over 760c/1400f and can vaporize any residual salts.
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