| 摘要 |
PROBLEM TO BE SOLVED: To remove psoralen compds. from a natural essential oil contg. the same industrially easily without adversely affeting the yield, the perfume component balance of the oil, etc., by fractionating the psoralen compds. with carbon dioxide in the subcritical or supercritical state as a fluid and with a supercritical carbon dioxide extraction column chromatograph apparatus filled with a porous polymeric resin. SOLUTION: An extraction container/separation column 5 is filled with a porous polymeric resin having a specific surface area of 300-700 m<2> /g, a microproe vol. of 0.7-1.1 ml/g, and a micropore radius of 50-1,300Å. Then, carbon dioxide in a subcritical or supercritical state at 31 deg.C or lower under a pressure of 75 kg/cm<2> or higher is supplied together with a natural essential oil contg. psoralen compds. from a bomb 1 through a spare coil 2, an indicator 3, and a six-way valve 6 to the separation column in order to cause the porous polymeric resin to adsorb the psoralen compds. to fractionate and remove them. The essential oil dissolved in carbon dioxide and contg. no psoralen compd. is separated from carbon dioxide in the gas-liq. separation column 5.
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