| 摘要 |
<p>Spent adsorption agents used for example in columns to refine glyceride oils and fats, are successively contacted with (1) an organic polar compound e.g. an alcohol such as isopropanol or a ketone to displace adsorbed impurities and (2) a superheated vapour of a hydrocarbon such as hexane, to reactivate the adsorbent by removing the adsorbed polar compound. The polar compound may be used in admixture with a hydrocarbon forming an immiscible azeotrope to facilitate solvent recovery. Silica and/or alumina or other adsorption agents may be repeatedly regenerated in accordance with the invention to refine fats such as palm, shea, sal and cottonseed oil.</p> |
