| 摘要 |
<p>A method of reducing residual solvent levels in extracted biomass that is contaminated with HFC solvent includes sparging the biomass extract with a solvent stripping gas such as air or Nitrogen. Apparatus for carrying out the method includes a vessel (12) containing extract (26) and a source of the gas. The source may be in the form of a moveable, hollow wand (27) having a sparging gas outlet; or a fixed gas inlet for bubbling the gas through the extract (26).</p> |
