Liquid Sugar Refining Process Ion Exchange Resin Demineralization System

1. Liquid Sugar Refining Process Ion Exchange Resin Demineralization System JUNE 16, 2011Organo THAILAND CO.

2. 1.Introduction Ion exchange resins (IER) have been employed in the sugar refinery process for the purpose of decolorization and demineralization (deashing) of sugar liquor. Compared to the remelting of white sugar, higher decolorization rate and extremely high sugar yield can be obtained by the direct demineralization of clear liquor or fine liquor. Organo has developed an efficient IER system the “SUPER FINE LIQUOR SYSTEM” (A-MB system), which consists of an anion exchange resin tower and a mixed bed tower of anion exchange resin and cation exchange resins. This system has been applied to many sugar refinery factories in Japan and has an excellent reputation for the high quality.

3. 2. Liquid Sugar Products in Japan Sucrose type Liquid Sugar Ion exchange resin refined liquid sugar ・High quality Large scale production (demineralization) Remelt liquid sugar （granulated sugar） ・Quality depends on granulated sugar and water. Small scale production ・Distinct flavor ・Nongenetically modified (compared to isomerized sugar made from cornstarch) Invert Syrup (Hydrolyzed sugar syrup) ・Low cost （Ingredient of sauce） Molasses type Liquid Sugar

4. Raw Sugar B sugar from Australia, Thailand etc. Affination Concentration Crystalization Remelt A-MB System Carbonation 600～1000 I.U. Filtration Ion Exchange Resin Deminiralization Active carbon or Bone char Concentration 60～150 I.U. 20～50 I.U. Ion Exchange Resin Decolorization Sterilization Filtration Crystalline Sugar <10 I.U. Liquid Sugar 3. Refining Process (Japan)

5. 4. Required Quality of Liquid Sugar (Example)

6. Affination Crystallization Crystallization Concentration Filtration Carbonation Carbonation Filtration Concentration Remelt C sugar A sugar B sugar 5. Refining Process (Thailand) Sugar cane Crushing & Extraction 300～600 I.U. Ion Exchange Resin 2 steps 100～300 I.U. ＜ Refined sugar White sugar Brown sugar ～45 I.U. 45～100 I.U. 400～1000 I.U.

7. Concentration Crystallization Concentration Carbonation Remelt Affination Filtration 6.Liquid Sugar Production Process Present process Proposed process A-MB System Ion Exchange Resin Demineralization < 20 IU < 1.0mS/cm Ion Exchange Resin 2 steps Sterilization Filtration Liquid sugar

8. Crystallization Affination Remelt Carbonation Concentration Crystallization Concentration Filtration Brown sugar ＞ Refined sugar White sugar 7.Total Demineralization Process Present process Proposed process A-MB System Ion Exchange Resin Demineralization Ion Exchange Resin 2 steps < 20 ICUMSA < 1.0mS/cm

9. 8.Principles of Demineralization Demineralization Regeneration Clear liquor or Fine liquor NaOH HCl Anion exchange resin Cation exchange resin Liquid sugar （Super fine) NaOH＋NaCl Organic acids NaCO3 Color etc. HCl＋CaCl2 NaCl, KCl etc. Adsorption of color, ions, organic acids etc.

10. 9.Conventional Ion Exchange Systems Reverse system（Ａ－Ｋ） Mixed Bed system（ＭＢ） Anion exchange tower Cation exchange tower Mixed bed tower ・High total throughput ・Low quality ・High quality ・Low total throughput

11. 10.A-MB System ・High quality ・High total throughput Anion exchange tower Mixed bed tower

12. 11.Comparison of Ion Exchange Systems Graph 1 Outlet color analysis of conventional systems and A-MB system Conditions: 50℃, Flow rate 4 L/L-SBAER・h Feed: Fine Liquor(Brix 50%, EC 98 mS/cm, pH 7.3, 71 I.U.)

13. 12.Column Test Results (Thailand)

14. 13.Column Test Results (Example １) Feed Analysis　（Clear liquor) Brix 55% pH 7.8 Conductivity 90 mS/cm Color Value 600 ICUMSA Unit

15. 14.Column Test Results (Example 2) Feed Analysis　（Clear liquor) Brix 54% pH 8.2 Conductivity 137 mS/cm Color Value 854 ICUMSA Unit

16. 15.Column Test Results (Example 3) Feed Analysis　（Fine liquor) Brix 60% pH 7.2 Conductivity 60 mS/cm Color Value 145 ICUMSA Unit Fine liquor Column outlet