| Abstract: | The influence of regenerant flowrate and concentration on regeneration capacity of cation exchange resins used in refining corn syrups was investigated. A strong acid exchange resin (Duolite C-26®) was examined over a range of resin compositions. Co-current regeneration was modeled using hydrochloric acid at dosages ranging from 64 to 256 g/I (4 – 16 lb/cu. ft.). Resin beds exhausted with large amounts of calcium (and other divalent ions) are best regenerated at high acid concentrations and low regenerant flowrates. Resin beds with large amounts of sodium and/or other monovalent ions are most efficently regenerated at low acid concentrations. Flowrate has little influence on regeneration with large amounts of sodium. Syrup deionized prior to isomerization typically has a lower divalent ion content than syrup deionized after isomerization. This suggests that two separate procedures may be necessary in order to most effectively use the regenerant. |
