Starch Based Fructose Plant
High fructose corn syrup (HFCS), a sweetener made from corn, comes in two primary compositions –
HFCS-42 and HFCS-55. This means it is composed of either 42 percent or 55 percent fructose, with the remaining sugars being primarily glucose and higher sugars (chains of glucose).
Composition wise, high fructose corn syrup is nearly identical to table sugar (sucrose), which is composed of 50 percent fructose and 50 percent glucose. Glucose is one of the simplest forms of sugar that serves as a building block for most carbohydrates. Fructose is a simple sugar commonly found in fruits and honey.
A simple comparison of the percentage of glucose and fructose reveals its similarities to table sugar.
- HFCS 42 = 42% fructose , 58% glucose
- HFCS 55 = 55% fructose , 45% glucose
- Table sugar = 50% fructose , 50% glucose
Properties of Fructose
Fructose, or fruit sugar, is a simple ketonic monosaccharide found in many plants, where it is often bonded to glucose to form the disaccharide sucrose.
Boiling point: 440 °C
Liquefaction process converts the starch slurry into liqueur by breaking the starch molecules with enzyme under determined temperature, pressure and reaction time.
In this process breakdown of starch into dextrose is done using an enzyme. The amylase is added immediately and the slurry is pumped into Saccharification tank. It takes about 40 hours for Saccharification. When the Saccharification liquid reaches the required DE value, it is heated to certain temperature immediately.
Glucose is filtered from slags created during liquefaction and scarification process. Saccharified solution containing several organic compounds (proteins, fatty substances, not liquefied starch, long chain polysaccharides, fatty acids, protein and fiber).
Ion exchangers are either cation exchangers that exchange positively charged ions (cations) or anion exchangers that exchange negatively charged ions (anions).
The refined liquid then comes to the evaporator to be concentrated to the required value. Then, it is pumped to the final product tank or going to the next stage of HFCS 55 production. Generally Falling film evaporator is used.
Isomerization system is the key component of the Fructose line. It is used to produce Fructose 42 from Glucose. Enzymatic method and controlled temperature are important parameters for Fructose 42 production.
Chromatographic is a new technology of continues separation and purification in HFCS 55 processing line for separation of Glucose and Fructose.