Cane Sugar Refining - Purolite

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Cane Sugar Refining with Ion Exchange Resins Puropack Packed Bed Upflow System A typical configuration for ion exchange decolorization system is an upflow packed bed system such as Purolite’s Puropack System. Since the specific gravity of 68 Brix syrup is 1.3325 (@standard conditions) and the specific gravity of strong base anion resin is 1.09, the flow of syrup during decolorization service is often run upflow to ensure the bed is undisturbed during a service flow interruption. A schematic of the operation and the advantages of Puropack are shown below. Puropack Advantages • Lower color released • Higher operational capacity • Lower chemical consumption • Lower water Consumption Service The typical service flow rate is 2.0-4.0 bed volumes/hour. (i.e. Syrup flowing through a bed containing 10 m3 of resin operating at 2 bed volumes/hour (BV/hr) would be flowing at 20 m 3 /hr) 12 Flat False Top Flat False Bottom SERVICE Purolite IP4 Inert Purolite Anion Resins REGENERATION
13 Cane Sugar Refining with Ion Exchange Resins The following diagrams illustrate the configuration and performance achieved by decolorization resins. Upflow Service Options 800 – 2000 ICUMSA 600 – 1000 ICUMSA A860S A860S A500PS A860S A500PS A500PS A500PS A860S 200 – 400 ICUMSA The acrylic A860S protects the styrenic A500PS from fouling and evens out color load fluctuations, providing a consistently low product color. 150 – 250 ICUMSA
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Page 52: Just ask Purolite. www.purolite.com

Cane Sugar Refining - Purolite

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