A kind of method utilizing vacuum low temperature extraction to separate steviol glycosides
A technology of vacuum low temperature and steviol glycosides, which is applied in the direction of chemical instruments and methods, sugar derivatives, sugar derivatives, etc., can solve the problems of high purity of products, high impurity content of extract liquid, and large loss of active ingredients, and achieve retention Bioactivity, easy industrial production, and less loss effect
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[0014] A method for separating steviol glycosides by vacuum low-temperature extraction, comprising the following steps:
[0015] (1), vacuum low-temperature leaching: the dry stevia leaves are pulverized to 20-60 mesh, and the medium water and the pulverized dry stevia leaves are vacuum-low-temperature leached and centrifuged to obtain an extract in a vacuum tank of internal circulation, The weight ratio of the medium water and the crushed dry stevia leaves is 10-15:1, the extraction vacuum is 20-30KPa, the temperature is 45-55°C, the time is 2-3 hours, and the stirring speed is 40-80rpm;
[0016] The pores of the filter cloth for centrifugal filtration are 80-100 mesh, and the rotation speed is 2800-3200rpm;
[0017] (2), secondary leaching: repeat step 1 to carry out vacuum low-temperature leaching, centrifugal filtration to primary extraction liquid, obtain secondary extraction liquid;
[0018] (3) Flocculation and precipitation: add flocculant to the secondary extraction ...
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