Shell core ion exchange resins - Purolite

Table 7: Samoan two-bed deionization study31% greater through-put from shell-core SAC41% yearly savings in acid and waterLonger runs on the following standard SBA resin saving $35,000on NaOHSodium leakage slightly lower.4. Another commercial case study replaced a standard SAC resin in a parallel twobeddeionization train at Elekeiroz, a Brazilian chemical intermediates producer.Table 8: Brazilian chemical company73% saving of H 2 SO 4 (shell-core SAC)29% saving of NaOH (Std. SBA)5. Two-bed lactic acid deionization was studied in which the shell-core SAC resinbed (counter-flow acid regeneration) gave 45% longer throughput at lower regenerationlevels and half the rinse water consumption in commercial use.In fact, the shell-core SAC resin throughput capacity was affected little by the HClregeneration level used.Table 9: Lactic acid two-bed deionization study (capacity used, meq mL -1 )Regeneration Level, lbft -3 Std. Macro Resin Std. Gel Resin Shell-CoreResin8.8 (141 g/l)7.4 (118.5 g/l)5.6 (90 g/l)4.4 (70 g/l)0.640.610.580.520.760.690.660.470.780.800.760.762.3 Mixed-Bed DeionizationA mixed-bed study with a shell-core SAC resin component produced high qualitywater more abundantly in a Philadelphia lab study. No advantage in lower quality waterproduction was seen.9