Ion Exchange Resin Column

Ion exchange usually describes a processes of purification of aqueous solutions using solid polymeric ion exchange resin more precisely the term encompasses a large variety of processes where ions are exchanged between two electrolytes.

Ion exchange resin column.

Cation exchange chromatography workflow. Column size most industrial ion exchange columns have a diameter between 0 5 and 3 2 m. The separation is based on the reversible interaction between a charged protein and an oppositely charged chromatography resin. All ion exchange chromatography relies on electrostatic interactions between the resin functional groups and proteins of interest.

Continuous ion exchange processes take place in a column or vessel containing a deep bed of ion exchange resin beads. For in depth information about iex download our iex handbook. The hardness ions ca and mg move into the resin beads and each of these divalent. Ion exchange chromatography resins can be used at high flow rates because binding kinetics for iex are fast and rigid chromatography particles can be used.

While many of us have heard of ion exchange ix resins few of us have a grasp on how the technology actually works. Rohm and haas ion exchange ion exchange introduction 4 fd sep 2008 to soften water you take a cation exchange resin on which the mobile ion inside the beads is sodium na and you pass the hard water through a column filled with the sodium form resin. Continuous ion exchangers consist of two columns in parallel. Common matrices are cellulose agarose polymethacrylate polystyrene and polyacrylamide.

Ion exchange processes can be conducted in continuous or batch mode with most water treatment ix processes run in a continuous mode. Bigger vessels with up to 4 0 m are sometimes built but the aspect ratio of the resin bed width height becomes unfavourable and very precise distribution and collection systems must be fitted to ensure an even flow of the water during service and. Thus the workflow below is given as a generalized iex workflow and particular running conditions for cation exchange chromatography may be adjusted to best suit your protein of interest the buffer system and the anion. Ion exchange takes place in one column while the resin in the second column is being regenerated resulting in continuous operation.

Ion exchange chromatography resins are composed of positively or negatively charged functional groups that are covalently bound to a solid matrix. Ion exchange chromatography resin selection. An ion exchange resin or ion exchange polymer is a resin or polymer that acts as a medium for ion exchange it is an insoluble matrix or support structure normally in the form of small 0 25 0 5 mm radius microbeads usually white or yellowish fabricated from an organic polymer substrate. The latter three matrices allow higher flow rates.

Water typically flows down through the resin bed. Aside from its use to purify drinking water the technique is widely applied for purification and separation of a variety of industrially and medicinally.