Method for purifying fructose
A fructose and polysaccharide technology, applied in chemical instruments and methods, fructose production, separation methods, etc., can solve the problems of large energy consumption and huge devices, and achieve the effect of reducing size, reducing volume and increasing volume
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Embodiment 1
[0183] Embodiment 1 (comparison)
[0184] This reference example is implemented by the following mixture to be separated, its dry matter concentration is 50%, and also has the following characteristics: the mass ratio of glucose relative to the total dry matter is 53%, the mass ratio of fructose relative to the total dry matter is 42%, The mass ratio of polysaccharides relative to the total dry matter was 5%.
[0185] In this example, the chromatographic purification was performed at a temperature of 65°C. Eluent volume BV used 水 is 0.205, the injection volume BV of the mixture to be separated 进料 is 0.145. The fructose in the extract achieved a purity of 97.3% by mass and a yield of 90% by mass.
Embodiment 2
[0186] Embodiment 2 (characterization of fructose degradation)
[0187] In a first step, three fructose composition samples were analyzed by analytical chromatography.
[0188] Figure 4 The analytical chromatograms for the following three samples are shown:
[0189] -A: Fructose purified by the SSMB method with a raw material of 50 Brix and operated at 65°C (as in Example 1);
[0190] -B: pure fructose syrup;
[0191] -C: pure fructose syrup after aging at 65°C for 17 hours.
[0192] Similar impurity appearance on the chromatograms was observed in samples A and C compared to sample B.
[0193] In a second step, the impurity content in pure fructose syrup was studied as a function of the concentration of the fructose syrup, and as a function of the temperature to which the syrup was subjected.
[0194] More precisely, analytical chromatograms of different samples were obtained for 8 hours at temperatures of 55° C., 60° C. and 65° C. and concentrations of 30, 40 or 50 Br...
Embodiment 3
[0196] Embodiment 3 (the present invention)
[0197] This reference example is implemented by the following mixture to be separated: its dry matter concentration is 50%, and also has the following characteristics: the mass ratio of glucose relative to the total dry matter is 53%, the mass ratio of fructose relative to the total dry matter is 42%, The mass ratio of polysaccharides relative to the total dry matter was 5%.
[0198] In this example, the chromatographic purification was performed at a temperature of 60°C. Eluent volume BV used 水 is 0.205, the injection volume BV of the mixture to be separated 进料 is 0.15. The fructose purity achieved in the extract was 98.5% by mass with a yield of 92% by mass.
[0199] It was observed under these conditions that the volume of zone 4 should be adjusted in order to obtain a polysaccharide yield of 70%, preferably 75%, preferably 80% in the raffinate. Therefore, the BV of zone 4 is preferably less than 0.56, preferably less tha...
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