Back to results
US 7,622,140 B2Granted
Processes and apparatus for extraction of active substances and enriched extracts from natural products
AssigneeGW Pharma Limited
InventorsBrian Whittle, Geoffrey Guy, David Downs, David Pate
Life of this patent
Estimating the term…
Abstract
Processes for preparing extracts of natural products such as plant material, and for preparing purified extracts from crude extracts of natural products, by extraction with hot gas. Apparatus suitable for use in preparing extracts of natural products are also described.
Claims28
A process for selectively preparing a cannabinoid-containing extract from cannabis plant material or a solvent extract thereof loaded onto an inert matrix material, comprising:
- contacting the cannabis plant material or solvent extract with a heated gas at a temperature which is greater than 100° C. and sufficient to volatilise at least one cannabinoid but does not cause pyrolysis of the cannabis plant material or solvent extract thereby volatilising the at least one cannabinoid to form a vapour, wherein the heated gas is one of a reducing gas and a non-oxidising gas;
- wherein the temperature to which the gas is heated is a temperature at which the target cannabinoid will volatilise condensing the vapour;
- and
- collecting the condensed vapour to form a selective cannabinoid-containing extract.
1 more element
A cannabinoid-containing extract which is substantially free of volatile terpenes, comprising:
- about 98% tetrahydrocannabinol (THC);
- about 2.5% cannabidiol (CBD);
- about 0.5% cannabinol (CBN);
- and
- only trace amounts of tetrahydrocannabinolic acid (THCA), cannabidiolic acid (CBDA) and ballast.
2 more elements
Dependencies are inferred from the claim text.