A parallel assembly (2; 11; 51) of chromatography column modules (3a,b,c; 13a,b,c; 53a,b,c, 90a, b), the assembly having one common assembly inlet (15; 55) and one common assembly outlet (17; 57), each column module comprising a bed space (29) filled with chromatography medium and each column module comprises integrated fluid conduits which when the column module is connected with other column modules are adapted to connect the bed space (29) of the column module with the assembly inlet (15; 55) and the assembly outlet (17; 57), wherein the total length and/or volume of the fluid conduit from the assembly inlet to one bed space together with the length and/or volume of the fluid conduit from the same bed space to the assembly outlet is substantially the same for all bed spaces and modules installed in the parallel assembly.

A parallel assembly (2; 11; 51) of chromatography column modules (3a,b,c; 13a,b,c; 53a,b,c, 90a, b) connected in a rigid housing (21; 61), the assembly having one common assembly inlet (15; 55) and one common assembly outlet (17; 57), each column module comprising a bed space (29) filled with chromatography medium and each column module comprises integrated fluid conduits which when the column module is connected with other column modules in the rigid housing are adapted to connect the bed space (29) of the column module with the assembly inlet (15; 55) and the assembly outlet (17; 57), wherein the total length and/or volume of the fluid conduit from the assembly inlet to one bed space together with the length and/or volume of the fluid conduit from the same bed space to the assembly outlet is substantially the same for all bed spaces and modules installed in the parallel assembly.

A flow passage unit has a column for used in a liquid chromatograph and a support body that supports the column. The column has: a porous stationary phase; a porous pressure adjusting part disposed at least at the flow-in end of the stationary phase, a liquid entering the flow-in end, the pressure adjusting part being harder than the stationary phase; and a covering part that covers the stationary phase and pressure adjusting part. The support body has a first plate and a second plate that are mutually joined, the support body forming a column holding part and a liquid flow passage, the column holding part holding the column between the first plate and the second plate, the liquid flow passage communicating with the column holding part. Pressure applied from the first plate and second plate to the pressure adjusting part is higher than pressure applied to the stationary phase.

Described herein are methods of purifying nucleic acids (e.g., mRNAs) from feed solutions using continuous, multicolumn chromatography approaches. Also described are methods of increasing the efficiency of chromatography methods by performing purification methods in parallel using multiple columns.

A parallel assembly (2; 11; 51) of chromatography column modules (3a,b,c; 13a,b,c; 53a,b,c, 90a, b), the assembly having one common assembly inlet (15; 55) and one common assembly outlet (17; 57), each column module comprising a bed space (29) filled with chromatography medium and each column module comprises integrated fluid conduits which when the column module is connected with other column modules are adapted to connect the bed space (29) of the column module with the assembly inlet (15; 55) and the assembly outlet (17; 57), wherein the total length and/or volume of the fluid conduit from the assembly inlet to one bed space together with the length and/or volume of the fluid conduit from the same bed space to the assembly outlet is substantially the same for all bed spaces and modules installed in the parallel assembly.

A process for purifying a hydrocarbon feed, using a first adsorption unit with first and second adsorption columns respectively filled with first and second adsorbent solids by simultaneously: a) treating the liquid phase hydrocarbon feed in the first adsorption column by contact with the first adsorbent solid to adsorb at least a portion of impurities present and to produce hydrocarbon effluent which is depleted in impurities; b) treating a secondary liquid hydrocarbon feed constituted either by a fraction of the hydrocarbon feed or by a fraction of the hydrocarbon effluent and depleted in impurities to purify the secondary liquid hydrocarbon feed; c) heating the treated secondary liquid hydrocarbon feed from step b); d) regenerating the second adsorbent solid of the second adsorption column which comprises impurities with the secondary hydrocarbon feed heated in step c) to desorb the impurities to produce an effluent with impurities.

The present invention provides a high throughput method to quantify and characterize the size and integrity of viruses and viral molecules using chromatographic system and in-line Dynamic Light Scattering (DLS) technique. In one embodiment, the present method quantifies and characterizes the size and integrity of enveloped or non-enveloped virus, live or live-attenuated or inactivated virus, recombinant viral vectors, or virus-like particles (VLPs). In one embodiment, the present invention comprises a column-switching system for running multiple analyses simultaneously. The present invention also provides a method to develop and evaluate virus containing products for the prevention of viral diseases. In another embodiment, the methods described herein serve as in-process quality control for manufacturing processes of virus vaccines.

Methods of preparing highly purified steviol glycosides, particularly Rebaudioside D, are described. The methods include purification from the extraction stage of the Stevia rebaudiana Bertoni plant, purification of steviol glycoside mixtures, Rebaudioside D and Rebaudioside A from a commercial Stevia extract, and purification of Rebaudioside D from remaining solutions obtained after isolation and purification of Rebaudioside A and a high purity mixture of steviol glycosides. The methods are useful for producing high purity Rebaudioside D, Rebaudioside A, and steviol glycoside mixtures. The high purity steviol glycosides are useful as non-caloric sweeteners in edible and chewable compositions such as any beverages, confectioneries, bakery products, cookies, and chewing gums.

Automated two step chromatography purification system comprising a, system controller, a capture flow path comprising at least one pump, an elution flow path comprising at least one pump, and a valve arrangement for selective connection of two capture columns to the capture flow path and the elution flow path respectively such that both flow paths may be operated simultaneously and in parallel.

Continuous extraction concentration and isolation units are constructed with at least one extraction chambers containing extractable material. Without disruption of total fluid flow in the unit: an extraction chamber completely depleted of extract can be refilled with fresh extractable material or can be replaced with an extraction chamber containing fresh extractable material. Extract are continuously separated from one or more solvents in expansion chambers and removed. All solvents can be retained within the unit. One or more compressors circulate the fluids through the extraction chambers, the expansion chamber, and a condenser, where the expansion chamber and the condenser can be coupled as a heat exchanger. One or more isolators can be included for selectively removing components that are extracted from the plant material without disruption of the process and provide the removed components in concentrated or pure form.