How is high fructose corn syrup produced?|FAQ

How is high fructose corn syrup produced?

2018-10-11 /

Application of high fructose corn syrup

High fructose corn syrup (HFCS) is a nutritive sweetener made from corn. It is widely used in carbonated drinks, fruit juices and sports drinks as well as snacks, syrups, jelly and other sugary products. On the following use the starch for example to answer the question how is high fructose corn syrup produced. High fructose corn syrup manufacturing process mainly include three section, that is starch liquefaction, saccharification and isomerism process. The detail manufacturing process flowchart as below:

High fructose corn syrup produced process

Next is the three main process introduction answer for how is high fructose corn syrup produced:
(1)_Liquefaction:
Starch slurry mixed with 30-35% dry solids and adjust its PH value to 6.0-6.4. Before put into α-enzyme, first add calcium, because calcium ions can stabilize the enzyme. Then mixed heat-stable α-enzyme (Novo’s Termamyl 120L) into the starch slurry, the slurry is instantaneously heated to 100 ℃ and held at this temperature for 10 min before it is cooled to 90 ℃. This temperature is maintained for 1-3h service for further hydrolyze the starch.
This process directly decided the yield of the high fructose corn syrup, also can understand this as the starch using rate of the answer for how is high fructose corn syrup produced.

Liquefaction process technical parameters:
-Starch slurry concentration: 32%-36% -α-enzyme: 8-10g per ton dry starch -PH value: before: 6.0-6.4/ after: 4.2-4.5 -Temperature: different value in different section -Liquefaction solution DE value: 15%-20%

Liquefaction tank

After this liquefying process complete of the how is HFCS high fructose corn syrup produced, the starch has been transfered into dextrins with a dextrose equivalent (DE) between 15 and 20. (The physical properties of thesyrup changed with the DE and the method of manufacture difference.) DE is the total reducing sugar in the syrup expressed as dextrose on a dry weight basis.

(2)_Saccharification process introduction:
After liquefaction, the pH value is reduced to between 4.2 and 4.5, after the solution is cooled to 60 ℃. Added the glucomylase (Novo’s AMG 300L) immediately. The reaction time for saccharification is usually between 24-48 hour depending on enzyme reaction speed. Glucoamylase releases single glucose units from the ends of dextrin molecule. Syrups of 95% glucose or higher are manufactured. This is the saccharification process for the F42 high fructose corn syrup manufacturing process. This section high influenced on the flavour of the high fructose corn syrup. Also an important part in the answer for how is high fructose corn syrup produced.

Saccharification tank

Saccharification process technical paramters:
-Glucomylase: 1.45-0.58L per ton dry starch -PH value: 5.5 -Saccharification solution DE value: 95%-98% -Time cost: 50h per tank

It's worth to tell you the liquefaction and saccharification step is the most important two parts of the high fructose corn syrup manufacturing. These steps performance influenced the glucose products quality directly. So the advanced technology and equipments is very important. All in all, when you asked how is high fructose corn syrup produced, except the technology process, you also need to concenrn the equipments quality.

(3)_Isomerism:
The purified glucose solution is isomerized by a reactor containing immobilized isomerase to obtain fructose syrup with 42% fructose content. It's honor to tell you that the isomerase we are using is a kind of immobilized enzyme. Converted from soluble state into immobilized state, the stability of isomerism will be increased significantly and it can be uses repeatedly in the high fructose corn syrup produced. This immobilized enzyme used in food processing make food free of enzyme after production, so there is no need to adopt the way of heat treatment to make enzyme inactivated, which can help improving the quality of food as well as economic benefits. This is our advantages of Doing Company technology answer for the how is high fructose corn syrup produced.

Isomerism process technical parameters:
-Glucose concentration: 42% -PH value: 7.0-7.5 -Temperature: 60-63℃ -Conversion rate: 42%

Isomerism equipments

Structural formulae of fructose (left) and glucose (right)

The raw material for high fructose corn syrup is glucose, which is converted from starch. The basic process of producing high fructose corn syrup is that starch slurry is catalyzed by alpha-amylase to form dextrin. Dextrin is formed by the catalytic action of glycosidase. Glucose is catalyzed by glucose isomerase, and the structure of the molecule changes, which is called isomerization of glucose. Glucose is isomerized to form fructose. However, not all glucose is isomerized and converted to fructose. This is because the glucose isomerase catalyzing efficiency peak (temperature is 60 ~ 70 ℃), the ratio of glucose into fructose and only 53.5% ~ 56.5%, and to attain balance and the catalytic reaction takes a long time.

High fructose corn syrup production

For another, if you want to get the F55 or F90 HFCS, just use the F42 as basic material to produced is a high efficiency and convenience method. After F42 high fructose corn syrup manufacturing produced, add the crystallization system and refining system can produced F90 high fructose corn syrup. And to produce F55, just mixed F90 with F42 with a suitable proportion. To sum up, among is the introduction of Doing Company answer for how is high fructose corn syrup produced, we can offer technology and equipments, give you complete high fructose corn syrup produced equipments, F42, F55, F90 all is suitable. If you have any questions or want to know more details of how is HFCS high fructose corn syrup produced, contact us freely and you can discuss with our engineers.

As a result, the ratio of glucose to fructose is actually only 42% to 45%, and the rest is still glucose. In other words, the product is actually a mixture of glucose and fructose, a mixture called fructose syrup. If the separating fructose and glucose, fructose syrup will separate isomerization of glucose again, and so repeatedly, finally the mixture of fructose content can reach 70% ~ 90%, and the mixture is called high fructose corn syrup. And you can click high fructose corn syrup manufacturing process equipment to get more information.