1、萃取介質不同。超臨界萃取用二氧化碳，亞臨界萃取主要5種溶劑：丁烷、丙烷、二甲醚等。

2、壓力不同。超臨界萃取壓力在20-50MPa，亞臨界0.3-0.5MPa。

3、溫度：超臨界萃取40℃以上，亞臨界常溫或更低溫度。

4、亞臨界投資小，生產成本低，規模大。

Differences between subcritical and supercritical process

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.