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Isomerisation of the glucose, which is an alpha-hydroxy-ketone, into fructose being beta-hydroxy-aldehydes.

It is done together with an enzyme: glucose-isomerase and will end up in an equilibrium state when about 50% is converted in fructose (also 50%).

This mixture is called:

  1. isomerose-syrup or IsoSweet(R) and is sweeter than the same amount of glucose-syrup.
  2. High Fructose Corn Steep (HFCS) liquor has up to 65% fructose by special treatment of 1.

Without an enzyme the reaction could be carried out in moderate alkaline solution and then also mannose is formed.

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14y ago
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Q: What is the process for turning glucose into fructose?
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