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Ion Exchange Resins in Corn Sweetener Refining
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Starch hydrolyzate plants around the world are utilizing high surface area synthetic adsorbents to replace granular and powdered activated carbon for removal of color, taste, odor, HMF (hydroxymethylfurfural) and other impurities from sweetener solutions. The Macronet™ line of chemically regenerated styrenic adsorbents offers economic, aesthetic, purity and ease of process advantages for replacing carbon in the production of bottler’s quality syrup.
Purolite adsorbents for corn sweetener refining and improving corn sweetener quality include:
|Service and Regeneration Sequence for Macronet™ MN102, MN152 or MN502|
|Step||Solution||Temp (°C)||Flow (BV/hr)||Volume (BV)||Time (min)||Comments|
|Sweeten Off||Demineralized water or condensate||40-60||2-5||2||Variable||Downflow|
|Backwash1||Demineralized water or condensate||30-60||2.5-3.7 gpm/ft2 of vessel area||1.5-2.0||30||Upflow 50% expansion|
|NaOH In2||1N NaOH||40-60||1||1.5||90||Downflow|
|Slow Rinse||Demineralized water or condensate||40-60||2||2||60||Downflow|
|HCl In3,4||0.1N HCl||40-60||2||3||90||Upflow|
|Slow Rinse||Demineralized water or condensate||40-60||2||2||60||Upflow|
|Fast Rinse5||Demineralized water or condensate||40-60||4||4||60||Downflow|
Color, Taste and Odor Removal - Sweetener Solutions