Method and apparatus for continuous flow isoelectric...

B - Operations – Transporting – 01 – D

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B01D 57/02 (2006.01) A61K 8/66 (2006.01) A61Q 5/02 (2006.01) A61Q 11/00 (2006.01) C02F 1/469 (2006.01) C07K 1/28 (2006.01) C25B 7/00 (2006.01) G01N 27/26 (2006.01) C02F 1/00 (2006.01)

Patent

CA 2281867

The invention provides a continuous flow apparatus and method for purifying charged substances from solutions or suspensions by isoelectric focusing on an industrial scale. The apparatus comprises a separating chamber, a pair of vertical electrodes (9) located at the extremes of the apparatus, an anion- or a cation-selective membrane (10) located near each of the electrodes (9) for separating electrode spaces from a central part of the apparatus, one or more outflow ports (12) for separating liquid fractions at the upper part of the chamber, two secondary outflow ports (11) being provided in the upper part of each of the electrode spaces, one or more vertical wall(s) (6) between each of said outflow ports partitioning the chamber at least at the height of said outflow ports (11, 12), and a plurality of vertical permeable partition walls (13) to enable a convection-free upward flow. The apparatus invention does not require additional amphoteric buffering solutions to establish a suitable pH gradient, and can be used for purification of polynucleotides, amino acids, peptides, proteins, organic solvents and beverages.

La présente invention concerne un appareil et un procédé de type flux continu permettant de purifier à échelle industrielle par électrofocalisation des substances chargées issues de solutions ou de suspensions. L'appareil comprend une chambre de séparation, une paire d'électrodes verticales (9) disposées aux extrémités de l'appareil, une membrane aniosélective ou catiosélective (10) au voisinage de chacune des électrodes (9) de façon à séparer d'une zone centrale de l'appareil les volumes d'électrode, un ou plusieurs orifices d'écoulement (12) permettant de séparer les fractions liquides au niveau de la zone supérieure de la chambre, deux orifices d'écoulement secondaires (11) réalisés dans la partie supérieure de chacun des volumes d'électrode, une ou plusieurs parois verticales (6) entre chacun des orifices d'écoulement considérés divisant la chambre au moins au niveau des orifices d'écoulement considérés (11, 12) et une pluralité de parois de séparation perméables verticales (13) permettant la libre remontée du flux par convection. L'appareil de l'invention, qui ne nécessite aucune adjonction de solution de tamponnage amphotère pour obtenir un pH d'un gradient approprié, convient pour la purification de polynucléotides, d'acides aminés, de peptides, de protéines, de solvants organiques et de boissons.

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