Cane Sugar Refining - Purolite

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Cane Sugar Refining with Ion Exchange Resins Resin Technical Data CANE SUGAR REFINING RESINS RESIN PUROLITE ® A860S Type Acrylic Macroporous Type I Strong Base Anion PUROLITE ® A500PS Styrenic Macroporous Type I Strong Base Anion PUROLITE ® A420S Styrenic Gel Type I Strong Base Anion HYPERSOL- MACRONET ® MN102 Styrenic Macroporous Adsorbent HYPERSOL- MACRONET ® MN150 Styrenic Macroporous Adsorbent PUROLITE ® IP4 Polypropylene Inert Cylinders TEC 0.8 eq/L (Cl-) 0.8 eq/L (Cl-) 0.8 eq/L (Cl-) 0.15-0.3 eq/L 0.15-0.3 eq/L NA Moisture 66-72% (Cl-) 63-70% (Cl-) 60-65% (Cl-) 50-60% (FB) 50-60% (FB) NA Mean 0.52-0.70 mm 0.65-0.9 mm 0.65-0.9 mm 0.45-0.63 mm 0.45-0.63 mm 1.1-1.5 mm Particle Size 0.8-1.6 mm Application Decolorization 800+ IU RESIN PUROLITE ® C115EC Type Methacrylic Macroporous Weak Acid Cation Decolorization 200-800 IU PUROLITE ® A500S Styrenic Macroporous Type I Strong Base Anion Decolorization 0-200 IU PUROLITE ® A850S Acrylic Gel Type I Strong Base Anion Decolorization, Taste and Odor Removal 0-200 IU PUROLITE ® A440S Styrenic Gel Type I Strong Base Anion Decolorization, Taste and Odor Removal 0-200 IU PUROLITE ® PRA420 Powdered Styrenic Gel Type I Strong Base Anion Upflow Distributor Protection PUROLITE ® CT124SH Styrenic Gel Strong Acid Cation TEC 3.5 eq/L (H+) 1.15 eq/L (Cl-) 1.25 eq/L (Cl-) 1.4 eq/L (Cl-) 0.8 eq/L (Cl-) 1.2 eq/L (H+) Moisture 46-53% (H+) 53-58% (Cl-) 57-62% (Cl-) 50-54% (Cl-) 60-65% (Cl-) 65-70% (H+) Mean Particle Size 0.55-0.8 mm 0.65-0.9 mm 0.65-0.9 mm 0.65-0.9 mm 0.05-0.10 mm 0.65-0.9 mm Application Demineralization Demineralization and Decolorization TEC = Total Exchange Capacity IU = ICUMSA color units NA = Not Applicable Demineralization and Decolorization Demineralization and Decolorization Decolorization 0-100 IU Sucrose Inversion PF Grade = Purofine (Uniform Particle Size ) Grade Available at 0.52-0.62 mm Average Size PP Grade = Puropack (Uniform Particle Size) Grade Available at 0.6-0.7 mm Average Size 38
ICUMSA Method for Color Measurement 39 Cane Sugar Refining with Ion Exchange Resins Spectrophotometer. For routine measurements it is not necessary to use a spectrophotometer; a photometer with a filter with a narrow band width (±10nm) is suitable. The design of the instrument should be such as to eliminate as far as possible the inclusion of forward-scattered light in the measurement of the transmitted light. This is achieved by restricting the size of the receiving aperture so that it only accommodates the restricted beam. Cells. For measurements of white sugar, a cell length of 10 cm is recommended. A second or reference cell may be used, provided that a test with distilled water has shown that the two cells are within 0-2% of being identical (with the instrument reading 100% transmittance on one cell, the other should give a reading between 99.8 and 100.2%). Also, membrane filters, 50 mm diameter, pore size 0.45 µm (mercury intrusion method), and membrane filter holders are required. Reagent. Kieselguhr, analytical grade. Procedure. Sample Preparation. The sugar to be tested is dissolved in unheated distilled water. The following concentrations are used: White sugars 50g/100g Darker-colored sugars As high as practicable, consistent with reasonable filtration rates and cell depths. Liquor, syrups, and juices Diluted to 50% solids or original density, unless dilution is required to obtain reasonable filtration rates or cell depths. The solution is filtered under vacuum; white sugar solution and light-colored liquors are filtered through a membrane filter, pore size 0.45µm. Slower-filtering solutions are filtered with Kieselguhr (1% on solids) through filter paper. The first portion of the filtrate is discarded if cloudy. The pH of darker-colored solutions is adjusted to 7.0±0.2 with dilute hydrochloric acid is removed under vacuum or in an ultrasonic bath, care being taken to minimize evaporation. The density of solution is checked after de-aerating. Distilled water filtered through a membrane filter is used as a reference standard. Color Measurement. The measuring cell is rinsed three times with the sugar solution and then filled. The absorbency of the solution is determined at 420nm using filtered distilled water as the reference standard for zero color. The cell length is chosen so that the instrument reading will be between 0.2 and 0.8 absorbancy, except for solutions of white sugar, where the cell length should be as long as possible. Result. The molar absorption coefficient A S of the solution is calculated as follows: a S -Log T S bc A S bc T S = transmittance A S = absorbance b = cell length (cm) c = concentration of total solids (mols/liter) determined refractometrically and calculated from density. a S = molar absorption coefficient (liter/mol cm)
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