| 摘要 |
<p>Extraction process wherein a supercritical fluid, or the same fluid in liquid state under near critical conditions, is used to extract the ceroid fraction of cork smoker wash solids and to isolate (C20- C26) long chain aliphatic alcohols, diterpenoid and triterpenoid compounds contained in said fraction. The extracts containing diterpenes, triterpenoids, long chain aliphatic alcohols, or mixtures thermos enriched in these compounds are submitted to fractionation, these compounds being isolated from the extracts. Extraction may be carried out in a batch or semi-batch mode at temperatures between 30 DEG C and 100 DEG C, the preferred temperature range being between 30 DEG C and 50 DEG C and at pressures between 6 MPa and 40 MPa (60 bar and 400 bar). Pressure and temperature may be changed during the extraction, or may be kept constant. The separation is carried out at temperatures between 20 DEG C - 120 DEG C and at pressures between 40 MPa (400 bar) and the atmospheric pressure. The fractionation may be carried out using separators, or in a column. <IMAGE></p> |
