UNIT OPERATIONS: Separation / Purification
Enrichment of High Fructose Syrup
- an example for a new chromatography application
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High Fructose (Corn) Syrup - HFS or HFCS - is a nutritive sweetener with high commercial potential. It is a product in which a large percentage of the glucose - derived from starch hydrolysis - has been converted into its sweeter-tasting isomer fructose, by the use of enzymes. The crystal clear syrup has a sweetness and calories approximately equal to that of a sugar solution. It performs many of the same functions as sugar, chiefly the "clean" sweetening of beverages, ketchup, dairy products, baked goods, and so on. HFS is usually sold at a price considerably below sugar, hence its popularity. |
Why enrichment?Fructose syrups obtained by isomerisation of glucose have less sweetening power than sucrose. For the use as a substitute of sucrose it is necessary to improve the sweetness of the syrup. Therefore the fructose content of around 42% of dry matter substance (dms) has to be enriched to a fructose content of 55% dms, to comply with industrial product standards. How?The enrichment of fructose by low cost chromatographic methods in a so-called moving bed process is effectively state-of-the-art. The main object of such a process is to fractionate fructose-glucose syrup into a 90% fructose syrup product (HFS90). To produce enriched fructose syrup with 55% fructose content (HFS55), original fructose-glucose syrup is blended with HFS90. As HFS90 only has a dms of 35%, the blended mixture is concentrated by evaporation to ensure durability of the product. |
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The
Vogelbusch HFS process
Vogelbusch's HFS process is based on the use of starch as a raw material, obtained from sources such as corn, wheat, cassava a.s.o. The block diagram (PDF) diagram gives a principle overview of the process steps in HFS production and the production of glucose monohydrate and anhydrous glucose with special focus on the latest development, a process and special equipment for the production of HFS90 for blending to syrups with lower fructose contents. Concentration profile (PDF) - Continuous, inline measurement of refraction and polarisation of the circulating liquid fluid enables the display of the actual concentration profile in the adsorbent bed as a diagram on the computer screen, thus permitting fine-tuning of the process to achieve optimum operating performance of the system. |
| Apart from HFS enrichment, the system can be used for various applications, for instance in molasses saccharfication. |
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Last modified: 19.12.03 by HaK