Abstract: This invention relates to a process for the enrichment of isotopes by chromatography on a saturated stationary phase. The process provides a more efficient method than the existing methods.

Abstract: This invention relates to a process for the enrichment of isotopes by chromatography on a saturated stationary phase. The process provides a more efficient method than the existing methods.

Abstract: The object of the invention is a method for enriching by chromatography of one or more compounds of a mixture in at least one column using an eluent, characterized in that a liquid mobile phase containing dissolved gas is used as eluent. A further object of the invention in the use in preparative chromatography of an eluent composed of a liquid mobile phase containing a dissolved gas.

Abstract: The invention concerns a method for fractionating cooking oil, in particular frying oil, using a solvent with supercritical pressure. The method is characterized in that it comprises steps which consist in: contacting, in a mixer, the cooking oil with the solvent with supercritical pressure; separating the resulting mixture into two phases in a decanter, namely a light phase and a heavy phase; decompressing the light phase and the heavy phase so as to recuperate the solvent, and the treated oil and the treatment residues respectively.

Abstract: The invention concerns a method and an installation for setting in adsorbed state, on a porous support, compounds contained in a product comprising a first step which consists in extracting the compounds by contacting the product with at least a solvent at supercritical pressure to obtain a mixture of extracts and solvent. The method is characterized in that it comprises a second step which consists in eliminating the water contained in the mixture of extracts and solvent, adjusting the temperature and pressure conditions so as to obtain, a first phase consisting of solvent in gaseous state and a second phase consisting of a mixture of liquids formed of solvent and extracts of the products; causing said two phases to trickle through a porous support adapted to adsorb the extracts; vaporizing the solvent contained in the second phase.

Abstract: A composition containing polyunsaturated fatty acid glycerides is purified by means of supercritical fluid fractionation in one or more countercurrent columns operated either with internal reflux achieved by a temperature gradient along the column or with an external reflux achieved through external regulation of the pressure, and using as the solvent a mixture of supercritical CO2 and a polar co-solvent. Oligomeric and malodorous impurities in particular can be successfully removed by this process, which also can, if desired, be followed, or preceded, by another supercritical fluid fractionation with supercritical C02 under conditions adjusted so as to favor fractionation of the glyceride components.