Apparatus and method for reducing residual solvent levels

Details Apparatus and method for reducing residual solvent levels Apparatus and method for reducing residual solvent levels

B - Operations, Transporting

01

D

B01D 3/00 (2006.01) B01D 3/34 (2006.01) B01D 11/00 (2006.01)

Patent

CA 2383604

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).

L'invention concerne un procédé permettant de réduire des niveaux de solvant résiduel suite à une extraction de biomasse contaminée à l'aide d'un solvant d'hydrocarbure fluoré (HFC), qui consiste à faire barboter l'extrait de biomasse avec un gaz de stripage de solvant, tel que de l'air ou de l'azote. L'invention concerne un récipient (12) contenant l'extrait de biomasse (26), et une source gazeuse. Cette source peut se présenter sous forme d'un tube-rallonge creux (27) mobile doté d'une sortie de gaz de barbotage, ou d'une sortie de gaz fixe permettant de faire barboter le gaz à travers l'extrait (26).

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