RATE OF THE VEGETABLE OIL EXTRACTION WITH SUPERCRITICAL CO2 .3. EXTRACTION FROM SEA BUCKTHORN

Oil from the seed and pulp of sea buckthorn berries (Hippophae rhamnoi des L.) was extracted with carbon dioxide at pressures 9.6-27 MPa and temperatures 25-6 degrees C. Influence of extraction conditions on sol ubility and mass transfer rate was studied. No marked changes in compo sition of extracted oil in the course of extraction were observed. Exp erimental extraction curves were evaluated using a model with grinding efficiency, volume mass transfer coefficients in solid and fluid phas es, and parameter of flow asymmetry as adjustable parameters. The soli d-phase mass transfer coefficient was increasing with rising temperatu re. Copyright (C) 1996 Elsevier Science Ltd