Introduction To Supercrtical Fluid Extiaction

Supercritical fluid extraction is the most advanced physical extraction technology in the world, abbreviated as SFE, which is a high and new technology emerging in modern chemical engineering separation. SFE combines traditional distillation and organic solvent extraction, and utilizes the excellent solvent power of supercritical COto effectively separate, extract, and purify the matrix and extract. CO2 is one kind of fluid that is safe, non-toxic and inexpensive. Supercritical CO2 has similar gas diffusion coefficient, liquid dissolving capacity, zero surface tension, and can quickly penetrate into solid materials to extract the essence, which is high efficient, not easily to be oxidized, pure natural, stable, non-toxic, non-chemical pollution and other characteristics. During the extraction by supercritical CO2, the extracted material can be separated out by reducing the pressure or raising the temperature, not needed to repeat extraction operations, therefore, the supercritical CO2 extraction process is simple. Thus, supercritical CO2 extraction is particularly suitable for the extraction and purification of biology, food, cosmetics and drugs.