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A production process and technology of stevia, applied in the preparation of sugar derivatives, sugar derivatives, sugar derivatives, etc., can solve problems such as difficulty in refining to 97%, and achieve improved safety, safe process operation, and avoid damage. Effect
Inactive Publication Date: 2015-11-18
湖南威嘉生物科技有限公司
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Problems solved by technology
However, in the prior art, if only ethanol is used as a solvent to refine stevioside, generally only a product with a purity of 95% can be obtained, and it is difficult to refine to 97%
Method used
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Embodiment 1
[0019] This embodiment includes the following steps:
[0020] (1) Weigh 400kg of stevia jaggery (the RA content of raw stevia jaggery is 55.4wt%, and the total sugar content is 87.6wt%), add 1300L of edible ethanol solution with a volume concentration of 84.1%, and heat to 70-80°C. Stir and reflux until the stevia sugar is completely dissolved;
[0021] (2) Filter the solution obtained in step (1) while it is hot, crystallize the filtrate obtained after filtration, add a seed crystal (0.4kg) equivalent to 1 / 1000 of the weight of raw sugar raw material during crystallization, and cool the filtrate to 5°C with chilled water , stirring and crystallizing for 8 hours; centrifugation after crystallization to obtain 283Kg crystal I (stevioside rough sugar I) and filtrate I (mother liquor);
[0022] (3) Dry the crystal I obtained in step (2) to obtain 226Kg of crystal I, weigh 200kg of crystal I, add 900L of edible ethanol solution with a volume concentration of 86.3%, heat to 70-80°...
Embodiment 2
[0030] This embodiment includes the following steps:
[0031] (1) Weigh 400kg stevia sugar (RA content of raw material stevia sugar is 55.6wt%, total sugar content is 87.4wt%), add 1200L edible ethanol solution with volume concentration of 86.7%, heat to 70-80℃, Stir and reflux until the stevia sugar is completely dissolved;
[0032] (2) Filter the solution obtained in step (1) while it is hot, crystallize the filtrate obtained after filtration, add 0.5 kg of seed crystals during crystallization, cool the filtrate to 0°C with chilled water, stir and crystallize for 10 hours; centrifuge after crystallization, Obtain 304Kg crystallization I (stevia sugar rough sugar I) and filtrate I (mother liquor);
[0033] (3) Dry the crystal I obtained in step (2) to obtain 217Kg of crystal I, weigh 200kg of crystal I, add 800L of edible ethanol solution with a volume concentration of 86.9%, heat to 70-80°C, stir and reflux to crystal I Dissolve completely;
[0034] (4) Filter the solutio...
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Abstract
A process for refined production of stevioside comprises the following steps: (1) mixing stevioside raw sugar and edible ethanol solution and performing stirring backflow until the stevioside raw sugar is fully dissolved; (2) performing immediate filtration of the obtained solution and crystallizing filtrate obtained after the filtration; performing refiltration after the crystallization and obtaining crystal I and filtrate I; (3) after the obtained crystal I is dried, mixing the obtained crystal I and the edible ethanol solution, and performing stirring backflow until the crystal I is fully dissolved; (4) performing immediate filtration of the obtained solution and crystallizing the filtrate obtained after the filtration; performing refiltration after the crystallization and obtaining crystal II and filtrate II; (5) performing concentration and drying of the obtained filtrate II; (6) drying the crystal II obtained through the step (4), and obtaining the product. By utilizing the fact that components of stevioside are different in solubility in the edible ethanol solution, rebaudioside A is separated and extracted, stevioside with the purity of rebaudioside A over 97% is obtained, and the use of solvents class 2 such as methanol and isopropanol is avoided.
Description
technical field [0001] The invention relates to a production process for refining stevioside. Background technique [0002] Stevia rebaudiana (Stevia rebaudinan Betroni) is a perennial herb of the genus Stevia in the Asteraceae family, native to the Amambay and Mbaxacayu mountains in Paraguay. Stevia, as a new sugar source plant, has attracted attention during the Second World War. In 1970, Japan introduced the species from Brazil and began domestication, cultivation, and sugar production. At the same time, experiments such as toxicology and food testing were carried out. Stevia rebaudiana is a temperature-loving plant in the Compositae family and has a wide range of suitable planting properties. my country successfully introduced it from Japan in 1976. At present, South Korea, Thailand, and the Philippines also have different degrees of promotion and cultivation. Cultivating stevia planting industry, and producing stevioside is deep processing of agricultural and sideli...
Claims
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