Shell core ion exchange resins - Purolite

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0.067Water Quality(cond., μS cm -1 )Table 10: High quality water productionStd. Mixed-BedCapacity,(meq mL -1 )5010.20.10.150.660.580.540.38Mixed-Bed with S/CSAC Capacity,(meq mL -1 )0.330.590.450.440.402.4 Sugar ChromatographyA lab study was made of the commercial process of separating glucose and fructoseto produce High Fructose Corn Syrup using SAC resin in the calcium form. Acceptedindustry test methods were used. The first test was hot water rinse-out rate of resinsaturated with 50% dextrose. The second was actual column chromatographic separationefficiency of glucose and fructose in a mixed stream.In the former (Table 11) the time required to reach a specific low glucose level isless as the S/R ratio of the resin decreased indicating faster diffusion kinetics.In the latter (Table 12) the separation efficiency of the shell/core resin isuninfluenced by the uniformity of the resin’s bead size (higher UC = less uniform bead sizedistribution) and whether the beads are stratified by size or remain randomly mixed. Beadstratification is known to harm chromatographic performance but not in the case of shellcoreresins.Table 11: Glucose rinse-out rate (minutes to glucose level)Shell/Radius Ratio 10% 5% 3% 1%1.0 std.0.720.391258576136968414610595174150145Shell/RadiusRatio1.0 std.1.00.750.75Table 12: Glucose-Fructose separationMean Size Uniformity Separation Indexmicrons Coefficient mixed bed4571.1544571.5604331.1604331.560Separation Indexstratified bed5552606010
2.5 Weak Acid Resin (WAC) ExampleWAC resin in shell-core form was used in simulated hot brine softening withstandard co-flow regeneration.The regeneration level was able to be reduced substantially while maintaining ahigher operating capacity than standard WAC resin.Table 13: Hot brine softening (recycling) in lab simulated oil recovery(co-flow HCl regeneration)Regen. Level Capacity (kg ft -3 ) to 0.2 ppm hardness Heel, ppm, hardnesslb HCl ft -3 Std. Resin Shell-Core Resin Std. Shell-Core9 (144 g L -1 )6.8 (109 g L -1 )24 350 310.7 02.1 1.42.6 Strong-Base Anion Resin (SBA) ExampleAn aggressive synthetic water made by extracting humic soil containing high levelsof SiO 2 , colloidal SiO 2 , and fulvic acid foulant. This was deionized with parallel two-bedlab systems. One system contained shell-core SBA resin (patent pending) in the lagposition; the other a standard SBA resin.The shell-core SBA resin train produced consistently lower silica and fulvic acid leakagethan the parallel system of all standard resins. The fulvic acid foulant was regenerated moreeffectively with caustic regeneration using3 lb NaOH ft -3 (48 g L -1 ) regeneration levels.Table 14: Aggressive water deionizationResinStd. SBAShell-Core SBACapacity,(meqmL -1 )0.300.28Fulvic Acid Leakage(%)112SiO 2 Leakage(%)43Average Cycles: 2 – 5; Water Composition: SiO 2 =20.5 ppm, Colloidal SiO 2 = 2.3 ppmTOC as Fulvic Acid = 14.3 ppm2.7 Other CharacteristicsThere are a number of accepted accelerated lab tests that predict the stability of ionexchange resin beads. All were used to test the long term stability of shell-core (SAC)resin with an appropriate standard resin control. The results show consistently moreresistance by the shell-core resins, particularly as the S/R ratio decreases.No instance of significant instability of shell-core resins beads has been reported inseventeen years of commercial use.1. Shell-core resin decreases in reversible swelling 1 (acid to base cycling) asshell/radius ratio decreases.11
Page 9: Table 7: Samoan two-bed deionizatio
Page 13: Table 19: Bead size uniformityShell

Shell core ion exchange resins - Purolite

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