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1. The extraction medium is different. Supercritical extraction with carbon dioxide CO2, subcritical extraction mainly with five solvents: butane, propane, DME, R134a and liqufied ammonia.
2. The pressure is different. Supercritical extraction pressure in 20-50MPa, subcritical 0.3-0.5MPa.
3. Temperature: supercritical extraction above 40 degree centigrade, subcritical is room temperature or lower temperature.
4. Subcritical extraction with smaller investment, lower production costs, larger scale.