The inert resin has no active groups and no ion exchange. The relative density is generally controlled between the anion and the cation resin to separate the cation and the cation resin, avoiding the cross-contamination of the cation and anion resin during regeneration, and making the regeneration more complete.

BIPC is an inert polymer in the form of cylinders. It has been especially designed for use in packed or partially packed and fluidised beds operated in the up-flow counter-flow mode. The polymer has optimum specific gravity. It can improve the distribution of regenerants during the downflow regeneration stage. BIPC can also be used in down flow processes with upflow regeneration, where it protects the strainers during the regeneration and improves the flow distribution during service


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