亚临界萃取和超临界萃取的区别

1、萃取介质不同。超临界萃取用二氧化碳，亚临界萃取主要5种溶剂：丁烷、丙烷、二甲醚等。

2、压力不同。超临界萃取压力在20-50MPa，亚临界0.3-0.5MPa。

3、温度：超临界萃取40℃以上，亚临界常温或更低温度。

4、亚临界投资小，生产成本低，规模大。

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.