Process in which the THC content of cannabis extract or a distillation residue is increased by treating the extract/residue with polar, water miscible solvents

摘要

A process for the isolation of delta-9-tetrahydrocannibinol (THC) from Cannabis plant material, wherein delta-9-THC acid and THC are separately obtained, comprising steps of: a) Extracting Cannabis plant material; b) Chelating the delta-9-THC acid from the extract on alumina; c) Washing non-acid components of the extract chelated on alumina with organic solvents; d) Eluting the delta-9-THC acid from the alumina with strong polar solvents.