| abstract |
the raw cannabis plant material is mixed with ethanol and centrifuged to extract cannabinoids. the ethanol can be cooled before adding it to the raw cannabis plant material, and a non-polar solvent stage can be used to increase the extraction yield. the crude oil and ethanol resulting from the dissolved cannabinoids are separated from the raw cannabis plant material and filtered to remove particulate materials, waxes, lipids, dissolved fats and impurities. the ethanol is then evaporated from the resulting mixture of oil and ethanol, and the remaining oil is then washed with saline, decarboxylated and distilled to obtain the cannabinoids and other desirable volatile phytochemicals. |