Solubility of squalane and dinonyl phthalate in CO2 with entrainers

The solubilities of two low volatile liquids of different polarity - squala ne and dinonyl phthalate - were measured in supercritical carbon dioxide en trained with a small amount of n-hexane, toluene or ethanol. A dynamic meth od of measurement was applied. Extraction pressure was 9-10 MPa, extraction temperature 303.15 K and 313.15 K. The concentration of entrainer in the v apour phase was in the range from 0 to 2-8 mol%. It was found that the solu bility of both solutes in CO2 could be increased considerably by entrainers . (C) 1999 Elsevier Science B.V. All rights reserved.