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US 10,246,431 B2Granted
Process to extract and purify Δ9-tetrahydrocannabinol
AssigneeAxim Biotechnologies, Inc.
InventorsLekhram Changoer, Cornelis Herman Michel Van Der Loo, Erik Keller
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Abstract
Δ9-THC carboxylic acid is extracted from cannabis flowers using a first organic solvent, then separated using a second aqueous solvent. Δ9-THC carboxylic acid is converted to Δ9-THC carboxylic salt before being extracted by a third organic solvent and converted back to Δ9-THC carboxylic acid. Using a solvent swap, Δ9-THC carboxylic acid is decarboxylated and extracted again with an organic solvent prior to purification to give Δ9-THC.
Claims1
A method of producing delta9-THC consisting essentially of:
- extracting delta9-THC carboxylic acid from cannabis flowers using heptane to obtain a heptane extract;
- filtering the heptane extract to remove solid plant matter;
- separating the delta9-THC carboxylic acid from the heptane extract by contacting the heptane extract with sodium chloride water adjusted to a pH range of 13.2 to 13.4 using an inorganic base to form a liquid mixture;
- stirring the liquid mixture;
- and leaving the liquid mixture to settle, wherein the liquid mixture forms three layers consisting of a first organic layer, a second oily layer, and third aqueous layer;
- and
- separating out the oily layer from the other two layers to yield the delta9-THC.
4 more elements
Dependencies are inferred from the claim text.