Isolation of component materials of aqueous solutions soluble in lipophilic solvents

In a process for the isolation of lipophilic solvent-soluble components from an aqueous solution containing lipophilic components comprising contacting the aqueous solution with one or both of a silica gel-based or kieselguhr-based concentration agent to absorb said aqueous solution therein and subsequently extracting substantially only the lipophilic solvent-soluble components from the aqueous solution absorbed in the concentration agent with a lipophilic solvent, the improvement which comprises employing as the concentration agent a flowable silica gel of kieselguhr or a mixture thereof, having an average particle size of 0.05 to 1.0 mm., an average pore volume of 0.2 to 3 ml./g. and a specific surface to 0.2 to 50 m.sup.2 /g., and said extracting is conducted without substantial simultaneous desorption of the water of said absorbed aqueous solution, said lipophilic solvent-soluble components being at least one analgesic, sedative, hypnotic, anti-epileptic, psychopharmaceutical, sympathicomimetic, anti-histamine, narcotic, alkaloid, antibiotic, lipid, triglyceride, fatty acid, steroid or porphyrin.