Supercritical Co2 Fluid Extraction Technology
1. What is supercritical Co2 fluid:
Supercritical Co2 is a fluid state, which occurs at or above its critical temperature 31.1 C and critical pressure 7.38 0 bar.
2. Characteristics’ of Supercritical Co2 Fluid:
a. Density under gas and liquid phase, close to liquid, or namely as dense gas, dissolve ability close to liquid.
b. Viscosity between gas and liquid phase, close to gas.
c. Diffusion coefficient between gas and liquid, much bigger than liquid phase, strong penetrability.
3. Supercritical Co2 Fluid Application
a. Food industries
b. Medical care food industries
c. The effective components in Chinese herbal medicine extraction
d. Extraction of natural flavors and fragrances
e. Natural pigment extraction
4. Supercritical Co2 Fluid Extraction Device Process Design:
Liquid Co2 from pressured bottle or storage tank, through pipeline into purifying part, cooling part, mixer part, after heated and transferred into extractor, where solid raw material loading into barrel feeding into extractor, with dissolve ability to extracting, through temperature and pressure condition change, separated target material in separator. Separated material without chemical solution remained, Co2 would be gasifying after few seconds.