Refining method of inulin
A refining method and technology for inulin, applied in the field of new resource food processing, can solve the problems of poor quality of inulin, low content of inulin, easy to absorb moisture and agglomerate, so as to improve yield, reduce material loss and shorten production time Effect
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[0018] Example 1:
[0019] Take 500 Kg of fresh Jerusalem artichoke tubers, wash them with clean water, shred them, and use purified water for countercurrent extraction. The ratio of material to liquid is 1:1.5, the extraction temperature is 60°C, and the extraction time is 40 min. The crude extract is obtained. The powder concentration is 4.4%. Then the crude extract is ultrafiltered with an ultrafiltration membrane (molecular weight of 10,000 Daltons), and then desalted and decolorized by a strong acid cation exchange resin and a weakly basic anion exchange resin to obtain a colorless, clear and transparent effluent. Filter (molecular weight 500 Daltons) concentrated to inulin concentration of 25%, and then spray-dried to obtain 51 Kg of inulin powder with a purity of 93.4% and an ash content of 0.15%.
[0020]
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[0021] Example 2:
[0022] Take 500 Kg of fresh Jerusalem artichoke tubers, wash them with water, shred them, and put them in pure water for 40 min. The material-to-liquid ratio is 1:1.5, and the extraction temperature is 60℃ to obtain a crude extract. The crude extract contains inulin The concentration is 4.2%. Then, the crude extract was purified by the lime milk-phosphoric acid method to remove impurities and clarify the crude inulin extract, and then desalted and decolorized by strong acid cation exchange resin and strong basic anion exchange resin to obtain a colorless, clear and transparent effluent. After concentration and spray drying, 51.8 Kg of inulin powder was obtained, with a purity of 87.2% and an ash content of 0.16%.
[0023]
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[0024] Example 3:
[0025] Take 300 Kg of fresh Jerusalem artichoke tubers, wash them with clean water, shred them, and use purified water for countercurrent extraction. The ratio of material to liquid is 1:3, the extraction temperature is 40°C, and the extraction time is 50 min to obtain a crude extract. The powder concentration is 2.7%. Then the crude extract is ultrafiltered with an ultrafiltration membrane (molecular weight of 10,000 Daltons), and then desalted and decolorized by strong acid cation exchange resin and weakly basic anion exchange resin to obtain a colorless, clear and transparent effluent. Filtration (molecular weight 700 Daltons) was concentrated to an inulin concentration of 20%, and then spray-dried to obtain 33 Kg of inulin powder with a purity of 90.7% and an ash content of 0.19%.
[0026]
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