Abstract: The invention relates to a method for separating a mixture in a system comprising a plurality of chromatography columns, the method successively comprising, in a cyclical manner, in a given part of the system, steps of collecting a raffinate, injecting the mixture to be separated, collecting an extract and injecting a mobile phase; wherein the method further comprises measuring the purity and/or yield of a collected fraction, comprising: the determination, in a node of the system, of the histories of at least two variables that are representative of the concentration of at least two species contained in the mixture to be separated using at least one fast online detector; the determination of the concentration of at least two species of the mixture to be separated in the collected fraction based on these histories; and the determination of the purity and/or yield of the collected fraction based on these concentrations.

Abstract: The invention relates to a method for separating a mixture in an installation comprising a first system comprising a plurality of chromatography columns, a second system downstream of the first system and a tank fed by an outlet line of the first system and feeding the second system with a continuous stream, the method successively comprising, in a cyclical manner, in a given part of the first system, steps of collecting a raffinate, injecting the mixture to be separated, collecting an extract and injecting a mobile phase; wherein the method further comprises the measurement of the purity and/or yield of at least one collected fraction, comprising: the determination of the concentration of at least two species of the mixture to be separated in the fraction collected in the tank; and the determination of the purity and/or yield of at least one species of the fraction collected in the tank.

Abstract: The invention relates to a method for separating a mixture in an installation comprising a first system comprising a plurality of chromatography columns, a second system downstream of the first system and a tank fed by an outlet line of the first system and feeding the second system with a continuous stream, the method successively comprising, in a cyclical manner, in a given part of the first system, steps of collecting a raffinate, injecting the mixture to be separated, collecting an extract and injecting a mobile phase; wherein the method further comprises the measurement of the purity and/or yield of at least one collected fraction, comprising: the determination of the concentration of at least two species of the mixture to be separated in the fraction collected in the tank; and the determination of the purity and/or yield of at least one species of the fraction collected in the tank.

Abstract: The invention relates to a method for separating a mixture in a system comprising a plurality of chromatography columns, the method successively comprising, in a cyclical manner, in a given part of the system, steps of collecting a raffinate, injecting the mixture to be separated, collecting an extract and injecting a mobile phase; wherein the method further comprises measuring the purity and/or yield of a collected fraction, comprising: the determination, in a node of the system, of the histories of at least two variables that are representative of the concentration of at least two species contained in the mixture to be separated using at least one fast online detector; the determination of the concentration of at least two species of the mixture to be separated in the collected fraction based on these histories; and the determination of the purity and/or yield of the collected fraction based on these concentrations.

Abstract: The invention relates to a method for purifying a first fatty acid, in particular a first polyunsaturated fatty acid, using an initial mixture further comprising at least one second fatty acid and a third fatty acid, with the method comprising at least: a first step of chromatographic separation in liquid phase, using the initial mixture, making it possible to recover on the one hand a first flow enriched with a first fatty acid and on the other hand a flow enriched with a second fatty acid; a second step of chromatographic separation in liquid phase, using the first flow enriched with a first fatty acid, making it possible to recover on the one hand a second flow enriched with a first fatty acid and on the other hand a flow enriched with a third fatty acid, with the second step of chromatographic separation being carried out in a static bed chromatographic separation unit.

Abstract: The invention related to a method for purifying a first fatty acid, preferably polyunsaturated, using an initial mixture further comprising at least one second fatty acid, optionally a third fatty acid and optionally a fourth fatty acid, with the method comprising: a first step of chromatographic separation in liquid phase, using the initial mixture, carried out in a first unit for chromatographic separation, making it possible to recover on the one hand a first flow enriched with a first fatty acid and on the other hand a flow enriched with a second fatty acid, optionally, a second step of chromatographic separation in liquid phase, using the first flow enriched with a first fatty acid, carried out in a second chromatographic separation unit, making it possible to recover on the one hand a second flow enriched with a first fatty acid and on the other hand a flow enriched with a third fatty acid; optionally, a third step of chromatographic separation in liquid phase, using the third flow enriched with a fi

Abstract: The invention related to a method for purifying a first fatty acid, preferably polyunsaturated, using an initial mixture further comprising at least one second fatty acid, optionally a third fatty acid and optionally a fourth fatty acid, with the method comprising: a first step of chromatographic separation in liquid phase, using the initial mixture, carried out in a first unit for chromatographic separation, making it possible to recover on the one hand a first flow enriched with a first fatty acid and on the other hand a flow enriched with a second fatty acid, optionally, a second step of chromatographic separation in liquid phase, using the first flow enriched with a first fatty acid, carried out in a second chromatographic separation unit, making it possible to recover on the one hand a second flow enriched with a first fatty acid and on the other hand a flow enriched with a third fatty acid; optionally, a third step of chromatographic separation in liquid phase, using the third flow enriched with a fi

Abstract: The invention relates to a method for purifying a first fatty acid, in particular a first polyunsaturated fatty acid, using an initial mixture further comprising at least one second fatty acid and a third fatty acid, with the method comprising at least: a first step of chromatographic separation in liquid phase, using the initial mixture, making it possible to recover on the one hand a first flow enriched with a first fatty acid and on the other hand a flow enriched with a second fatty acid; a second step of chromatographic separation in liquid phase, using the first flow enriched with a first fatty acid, making it possible to recover on the one hand a second flow enriched with a first fatty acid and on the other hand a flow enriched with a third fatty acid, with the second step of chromatographic separation being carried out in a static bed chromatographic separation unit.

Abstract: A process is provided for recovering a first polyunsaturated fatty acid (PUFA) from a feed mixture including at least one additional fatty acid (e.g., a second fatty acid (FA)). The process optionally comprises: performing a main step of chromatographic separation using an aqueous organic eluent and collecting a first stream of eluent enriched in the first PUFA and a second stream of eluent enriched in the second FA; subjecting the second stream of eluent to a partial concentration step to obtain a concentrated portion including the second FA, and a depleted portion comprising eluent, but depleted of the second FA. The process also includes: at least partially recycling the depleted portion for use in the main step of chromatographic separation.

Abstract: A process is provided for recovering a first polyunsaturated fatty acid (PUFA) from a feed mixture including at least one additional fatty acid (e.g., a second fatty acid (FA)). The process optionally comprises: performing a main step of chromatographic separation using an aqueous organic eluent and collecting a first stream of eluent enriched in the first PUFA and a second stream of eluent enriched in the second FA; subjecting the second stream of eluent to a partial concentration step to obtain a concentrated portion including the second FA, and a depleted portion comprising eluent, but depleted of the second FA. The process also includes: at least partially recycling the depleted portion for use in the main step of chromatographic separation.

Abstract: A process is provided for recovering a first polyunsaturated fatty acid (PUFA) from a feed mixture including at least one additional fatty acid (e.g., a second fatty acid (FA)). The process optionally comprises: performing a main step of chromatographic separation using an aqueous organic eluent and collecting a first stream of eluent enriched in the first PUFA and a second stream of eluent enriched in the second FA; subjecting the second stream of eluent to a concentration step to obtain a concentrated portion including the second FA, and a depleted portion comprising eluent, but depleted of the second FA. The water-to-organic ratio of the depleted portion is lower than the water-to-organic ratio of the second stream of eluent. The process also includes: at least partially recycling the depleted portion for use in the main step of chromatographic separation.