Dextrose is enzymatically isomerized to fructose by passing through isomerization column.
To facilitate isomerization of dextrose to a 42% fructose solution, salts such as BSS, Na2CO3, MgSO4 are need be added into dextrose syrup.
The dextrose syrup goes though the isomerase enzyme column where convert dextrose to fructose, under conventional conditions, it is generally produces a syrup containing a minimum of 42% fructose.
Carbon (granula or powder) or adsorbent resins remove color, flavor and odor compounds from 42% fructose syrup, generally, carbon is often used ahead of ion exchange whereas adsorbent resins are used after deionization.
The salts which are added to facilitate increase enzyme activity must be removed after isomerization via deionization to produce a pure sweetener for sale or subsequent enrichment to a 55% fructose solution.
Low ds 42% fructose syrup is concentrated to solid 70.5%~71.5% by evaporation of water.
Separating the F42 by chromatography can obtain high fructose glucose syrup (HFGS). Mixing the HFGS and F42 in a certain proportion can produce F55.
(1) Chromatographic separation: Transport 50% F42 to Chromatographic separation column, run according to the specific procedure, glucose and fructose will be separated, F90 fructose-glucose syrup can be obtained.
(2) Mixing: Mixing F42 and F90 in a certain proportion to produce F55.
(3) Decolorization: The F55 needs to be purified by decolorization.
(4) Mixed bed: The decolorized F55 needs to be purified to remove the salt and other impurities by mixed bed, so as to guarantee the quality of final product.
(5) Sterilization: Use special filter to remove bacteria from F55 product, so that the product can meet the standard requirement.
(6) Evaporation: After sterilization, use evaporation to increase the concentrate of F55 product.
(1) Chromatographic separation: Sending 60% F42 syrup to Chromatographic separation column, run according to the specific procedure, glucose and fructose will be separated, F95 will be prouced.
(2) F95 Refinery: Through active carbon and ion exchange resin to remove impurities and bad odour for purification.
(3) Evaporation: Purified F95 syrup is sent to evaporator for concentration to the required DS.
(4) Crystallization: The concentrated F95 syrup is sent to crystallizer for crystallizaiton. The crystalline fructose will be formed by controlling suitable temperature.
(5) Separation: After crystallization the wet crystalline fructose will be separated with mother liquid by separator.
(6) Drying: The wet crystalline fructose is sent to dryer for removing extra moisture to match finished product requirement.