Industrial Results:
1. Fructose/ Dextrose Separation:
This chromatographic separation has the highest number of installations worldwide.
With the ISMB process, the following performance can be
achieved, depending on the design parameters. The DIAION® UBK resins are used in the calcium form.
| |
Feed |
Product (Fructose) |
Rafinate (Dextrose) |
Recovery Rate |
|
FRUCTOSE |
43.0% |
94.4% |
3.8% |
95.0% |
|
DEXTROSE |
52.0% |
4.0% |
88.9% |
|
|
OTHER |
5.0% |
2.0% |
7.3% |
|
|
TDS (Bx) |
60.0% |
36.0% |
28.0% |
|
| |
Feed |
Product (Fructose) |
Rafinate (Dextrose) |
Recovery Rate |
|
FRUCTOSE |
44.0% |
97.0% |
6.7% |
91.0% |
|
DEXTROSE |
51.2% |
1.0% |
86.5% |
|
|
OTHER |
4.8% |
2.0% |
6.8% |
|
|
TDS (Bx) |
60.0% |
36.0% |
24.4% |
|
2. Separation Sugars - Non-sugars:
The first ISMB unit in Europe has been in operation for
more than 10 years with a Fructose syrup. The investment was decided, among other reasons, to increase the capacity of an existing ion exchange resin system without significantly increasing the polluting load.
Feed syrup:
- Decalcified Fructose syrup
- Bx: 60
- Fructose purity:85 %
-
Temperature: 65ºC
-
pH ≥5
The UBK resin is used in the
sodium form.
Assuming that the required specifications for the syrup and the elution water are met, the ISMB process can globally operate 350 days/ year. For such a continuous operation, two annual stoppages are suggested to define columns/ chambers in which the pressure drop does not exceed an average of 3 bars. Softened water or condensate suitably filtered at 25 microns is used for the elution. The decalcified syrup feed (with a monovalent to divalent ratio of 50) is also filtered at the same cut-off point.
Conclusion:
The ISMB chromatography process used for the Fructose/ Dextrose separation with resins in the calcium form and for the sugar (Fructose) / non-sugar separation with resins in the sodium form features high performances.
These includes:
- A higher volumetric load compared the SMB system and, therefore, a lower volume of resins by approx. 30 %;
- A lower water consumption with a W/F ratio of approx. 1.8 and 3, respectively;
- A lower energy consumption thanks to the operating mode and smaller pressure drops across the distributors/ collectors and the resin beds.
As a result, the smaller dimensions for the columns/ chambers and the simplification of the auxiliary equipment (such as valves, pipes, pumps, instrumentation, etc.) both contribute to make the investment for ISMB chromatography processes very competitive.
|
