Production of special oils with supercritical fluids

摘要

In recent years consumers were mainly concentrated on convenience and taste. Nowadays as both are given innovations regarding health and nutrition are additionally required. Processes based on SFE were successfully developed and realized on commercial scale like processing of special vegetable oils with health benefits (like roasted sesame oil). Extraction with supercritical CO_2 is a good solution for low volatile and viscous essential oils because of high diffusion velocity and fast mass transfer. Such is especially important for wood oils (sandal wood, hinoki, aquilaria). Extraction of volatile oils needs in most cases a lower pressure (90 to 120 bar). To minimize the energy consumption a compressor process shall be used. Some examples of products are presented including economic considerations.