Table 2.
Cannabis supercritical extraction methods.
| Conditions | Results | Reference |
|---|---|---|
| Material: Cannabis sativa seeds; Solvent: Water; Pressure: 105 bar; Temperature: 80-200 °C | Low levels of Δ9-THC and CBN were achieved, yielding a nutraceutical-grade cannabinoid | 31 |
| Material: Cannabis bars; Solvent: Carbon dioxide (CO2); Pressure: 180 bar; Temperature: 40 °C | Yielding: ≈14% wt (CBD), ≈23% wt (THC) – in the extract | 32 |
| Material: Cannabis from different regions, Solvent: CO2; Co-Solvent: Ethanol (2 % wt); Pressure: 330 bar; Temperature: 40 °C, Time: 2 h | Yielding: ≈2% wt (CBD), ≈27% wt (THC) | 33 |
| Material: Cannabis Sativa L.; Solvent: CO2; Pressure: 380 bar; Temperature: 60–80 °C | After the purification process, it was possible to obtain a CBD extract with 80% purity | 34 |
| Material: Hemp plant; Solvent: CO2; Co-Solvent: Ethanol; Pressure: 200 bar; Temperature: 40 °C | CBD extract (≈449 mg/g) | 35 |
| Material: Cannabis bud material; Solvent: CO2; Pressure: 320 bar; Temperature: 60 °C; Time: 600 min; Flow Rate: 150 g/min | Extraction: ≈7% wt, with the highest recoveries for CBD and THC (>98%) | 36 |
| Material: Cannabis sativa L.; Solvent: CO2; Co-Solvent: Ethanol (0–5% wt); Pressure: 150–330 bar; Temperature: 60 °C; Time: 600 min; Flow Rate: 150 g/min | THC yields ≈ 37% Purity ≈ 90% |
37 |
| Material: Cannabis sativa L.; Solvent: CO2; Pressure: 170–340 bar; Temperature: 55 °C; Flow Rate: 200 g/min | THCA and Δ9-THC Process extraction efficiency ≈92% |
38 |
| Material: Cannabis flowers; Solvent: CO2; Pressure: 250 bar; Temperature: 45 °C; Time: 180 min | Concentration: ≈2.4% wt (CBDA), ≈0.05% wt (THCA) | 39 |