| 摘要 |
There is described a process for the extraction of a least one relatively polar component form a material which may be naturally occurring or a synthetic mixture, the process comprising the steps of: (a) contacting the material with a solvent mixture comprising C1 to C4 fluorinated hydrocarbon, especially 1,1,1,2-tetrafluorethan and a co-solvent having a dielectric constant (at 20° C.) of at least 6 so as to charge the solvent mixture wherein the co-solvent is selected from the group consisting of amides, sulfoxides, alcohols, ketones, organic acid, carboxylic acid derivatives, cyanide derivatives, ammonia sulfur containing molecules, inorganic acids and nitro derivatives and separating the charged solve mixture from the material to isolate the polar component.
|
