A mixer-settler countercurrent chromatography centrifuge and rotor of increased capacity is described.

The present invention provides a chromatographic separation process for recovering a polyunsaturated fatty acid (PUFA) product from a feed mixture, which comprises: (a) purifying the feed mixture in a first chromatographic separation step using an eluent a mixture of water and a first organic solvent, to obtain an intermediate product; and (b) purifying the intermediate product in a second chromatographic separation step using as eluent a mixture of water and a second organic solvent, to obtain the PUFA product, wherein the second organic solvent is different from the first organic solvent and has a polarity index which differs from the polarity index of the first organic solvent by between 0.1 and 2.0, wherein the PUFA product is other than alpha-linolenic acid (ALA), gamma-linolenic acid (GLA), linoleic acid, an ALA mono- di- or triglyceride, a GLA mono- di- or triglyceride, a linoleic acid mono- di- or triglyceride, an ALA C.sub.1-C.sub.4 alkyl ester, a GLA C.sub.1-C.sub.4 alkyl ester or a linoleic acid C.sub.1-C.sub.4 alkyl ester or a mixture thereof.

The present invention provides a chromatographic separation process for recovering a polyunsaturated fatty acid (PUFA) product from a feed mixture, which comprises: (a) purifying the feed mixture in a first chromatographic separation step using an eluent a mixture of water and a first organic solvent, to obtain an intermediate product; and (b) purifying the intermediate product in a second chromatographic separation step using as eluent a mixture of water and a second organic solvent, to obtain the PUFA product, wherein the second organic solvent is different from the first organic solvent and has a polarity index which differs from the polarity index of the first organic solvent by between 0.1 and 2.0, wherein the PUFA product is other than alpha-linolenic acid (ALA), gamma-linolenic acid (GLA), linoleic acid, an ALA mono- di- or triglyceride, a GLA mono- di- or triglyceride, a linoleic acid mono- di- or triglyceride, an ALA C.sub.1-C.sub.4 alkyl ester, a GLA C.sub.1-C.sub.4 alkyl ester or a linoleic acid C.sub.1-C.sub.4 alkyl ester or a mixture thereof.

Disclosed is a particle manipulation method including steps of moving particles, which exist in a water-based liquid, into a gelled medium that is insoluble or hardly soluble in the water-based liquid in the water-based liquid, and moving the particles, which exist in the gelled medium, to the outside of the gelled medium. Preferably, the gelled medium is a gel that contains chemically crosslinking polymer. Preferably, the gelled medium has a consistency of 340 to 475. In one embodiment, the movement of the particles existing in the water-based liquid to the gelled medium and the movement of the particles existing inside the gelled medium to the water-based liquid are carried out inside a device, the device being loaded with a plurality of water-based liquids and a gelled medium interposed among the water-based liquids.

A process for purification of polyether block copolymers comprising polyoxyethylene and polyoxypropylene moieties using sequential multi-column size exclusion chromatography apparatus operated as a counter current moving bed wherein a process cycle comprises the steps of.

The invention relates to a monolithic porous material based on amorphous silica or activated alumina or on one of their mixtures, the material comprising substantially rectilinear capillary ducts that lie parallel to one another, and being intended to be used as packing in a chromatography column, characterised in that: the ducts have, relative to one another, a substantially uniform cross section; the cross-section of each duct is uniform over its entire length; the ducts pass right through the material; the volume of micropores smaller than 0.3 nm is smaller than 50% of the total porous volume of the material.

The object of the invention relates to an extraction cell for a centrifugal partition chromatograph, which extraction cell contains an extraction chamber delimited by a cell wall and accommodates the liquid stationary phase, and it has a liquid inlet opening and a liquid outlet opening serving to let in and out the liquid mobile phase to be made to flow through the extraction cell. The essence of the extraction cell is that it contains an extraction chamber established as a tubular body, and a liquid inlet plug that includes a liquid inlet opening and a liquid outlet plug that includes a liquid outlet opening, that can be attached to the extraction chamber.

The object of the invention also relates to a centrifugal partition chromatograph containing such an extraction cell, and a method for producing such an extraction cell.

The present disclosure relates to methods for separating and purifying a long chain diacid from other long chain diacids, monocarboxylic acids, hydroxyl acids or alkanes by simulated or actual moving bed chromatography.

An apparatus and a method is for separating liquid from a material comprising a solid fraction and a liquid fraction. The apparatus has a conveyor belt for bringing the material from a receiving portion to a discharge portion. At least a portion of the conveyor belt is provided with at least one sorption means for absorbing and/or adsorbing liquid from the material while the material is carried between the receiving portion and the discharge portion.

The present specification discloses methods of purifying one or more cannabinoids from a plant material, purified cannabinoids and pharmaceutical compositions comprising one or more cannabinoids produced by the disclosed method, methods and uses for treating a disease or condition employing such purified cannabinoids and pharmaceutical compositions.