Production technology of high-purity stevioside
A production process and technology of stevia, applied in the field of production technology of high-purity stevia, can solve the problems of the development of low value-added stevia, the overall level is not optimistic, the degree of automation is not high enough, and can solve the problem of waste pollution and no teratogenicity. , good taste effect
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Embodiment 1
[0015] The production process of high-purity stevioside of the present invention comprises an extraction step, a flocculation step, a membrane filtration step, an adsorption separation step, a reverse osmosis concentration step, a desalination and decolorization step and a recrystallization step, and the extraction step is: selecting high-quality stevia rebaudiana by screening Leaves in water temperature 70 o 2-stage countercurrent extraction is carried out under C, and the extract enters the next process; the flocculation step is: the above-mentioned extract enters the flocculation tank and then adds the prepared calcium salt and iron salt while stirring, and after the mixing is complete, it is left to settle for 0.5 hours, and then The precipitate is removed by plate and frame pressure filtration; the membrane filtration step is: the supernatant of the feed liquid is pretreated by microfiltration and then subjected to ultrafiltration membrane filtration, and the retained liqu...
Embodiment 2
[0017] The production process of high-purity stevioside of the present invention comprises an extraction step, a flocculation step, a membrane filtration step, an adsorption separation step, a reverse osmosis concentration step, a desalination and decolorization step and a recrystallization step, and the extraction step is: selecting high-quality stevia rebaudiana by screening Leaves in water temperature 80 o 2-stage countercurrent extraction is carried out under C, and the extract enters the next process; the flocculation step is: the above-mentioned extract enters the flocculation tank and then adds the prepared calcium salt and iron salt while stirring. The precipitate is removed by plate and frame pressure filtration; the membrane filtration step is: the supernatant of the feed liquid is pretreated by microfiltration and then subjected to ultrafiltration membrane filtration, and the retained liquid is washed with water and then discharged; Collected and analyzed with ethan...
Embodiment 3
[0019] The production process of high-purity stevioside of the present invention comprises an extraction step, a flocculation step, a membrane filtration step, an adsorption separation step, a reverse osmosis concentration step, a desalination and decolorization step and a recrystallization step, and the extraction step is: selecting high-quality stevia rebaudiana by screening Leaves in water temperature 90 o 2-stage countercurrent extraction at C, and the extract enters the next process; the flocculation step is: the above-mentioned extract enters the flocculation tank and then adds the prepared calcium salt and iron salt while stirring. After mixing completely, let it settle for 1.5 hours, and The precipitate is removed by plate and frame pressure filtration; the membrane filtration step is: the supernatant of the feed liquid is pretreated by microfiltration and then subjected to ultrafiltration membrane filtration, and the retained liquid is washed with water and then discha...
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