Operating Methods:

So far you have learnt about different properties of the resins and their effect on the resin behaviour particularly with regard to their utility for separations. In the context of utility of resins, the question arises as to how are the resins operated or brought in contact along with the solution. There are two major methods for this. They are batch and column methods. The column method may be further sub-divided as to whether the resin bed is fixed or moving and whether the feed solution and regenerant solution flow past the resin in the same relative direction or in opposite direction.