Abstract: A process for purifying at least one product from a substrate containing at least one product, includes subjecting the substrate to centrifugal partition chromatography in an ion exchange displacement mode to purify the at least one product from the substrate, the at least one product being an amphoteric product.

Abstract: The invention concerns the use of centrifugal partition chromatography in displacement mode for implementing a process for purifying galanthamine or its derivatives, from a starting composition, containing at least 20% of galanthamine or its derivatives. Said method comprises a step of centrifuging a combination of at least two solvents and said starting composition, for a time sufficient for purifying the galanthamine or its derivatives, said solvents being such that they form two non-miscible phases, namely an aqueous phase and an organic phase, the aqueous phase serving as mobile phase or stationary phase, the organic phase serving respectively as stationary phase or mobile phase.

Abstract: The rotating device for a centrifugal partition chromatograph comprises at least one thick-walled cylindrical body (1) that can be driven in rotation around its axis (14), the said cylindrical body (1) comprising several cells with a height less than a determined height. The cells, arranged in the housings (11), have an elongated shape arranged along a direction with a radial component with regard to the rotation axis (14) of the said body (1) and connected to each other in series through ducts. The single piece cylindrical body (1) has a thick wall, with a height (H) at least twice as high as the said determined height, the said cells being arranged at several different heights. For example, several hundred cells may be arranged in the single piece cylindrical body (1). The rotating device resists pressures well above 100 bars and can be used for industrial applications.

Abstract: The rotating device for a centrifugal partition chromatograph comprises at least one thick-walled cylindrical body (1) that can be driven in rotation around its axis (14), the said cylindrical body (1) comprising several cells with a height less than a determined height. The cells, arranged in the housings (11), have an elongated shape arranged along a direction with a radial component with regard to the rotation axis (14) of the said body (1) and connected to each other in series through ducts. The single piece cylindrical body (1) has a thick wall, with a height (H) at least twice as high as the said determined height, the said cells being arranged at several different heights.