The high-pressure extraction process is based on the principle that gases in the liquid state (above the critical pressure and critical temperature) are able to dissolve larger amounts of natural substances than would normally be allowed by the partial pressure of the substance in the solvent.
In many applications, supercritical fluid extraction has several advantages over conventional processes. Botanical ingredients sensitive to high temperatures can be extracted fluidly and selectively. There are no solvent residues in the extract or raw material. Smells and aromas remain unchanged. Pure extracts are obtained with fewer process steps.
The CO2 extractor is recyclable and does not cause any environmental problems.
The food, cosmetic and pharmaceutical industries are the main users of supercritical CO2 extracted components, but new applications and processes are constantly being developed and implemented, such as thin film extraction, particle formation, impregnation, cleaning of metallic parts , dyeing and cleaning of textiles, removal of undesirable substances, chemical reactions and crystallization.