Stevioside glycoside refining process

A technology of stevioside and refining method, which is applied in the field of stevioside refining, can solve the problems of low yield, peculiar smell of the product, and inability to obtain stevioside A, etc., and achieve the effect of high yield and white color

Inactive Publication Date: 2002-05-22
青岛创升生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of methanol in this process is harmful to the human body. This process cannot obtain high-purity stevioside A. The separated product has peculiar smell and the yield of the product is very low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0011] Select 10kg of steviol glycoside with stevioside A content of 21% and mix it with 14kg of ethanol, dissolve it at 25°C for 12 hours, stir the mixture for 10 minutes every 2 hours, and separate the dissolved mixture through a plate and frame filter press for solid-liquid separation , the filtered solid is added with anhydrous salt water to adjust the concentration to 1%, and activated carbon is added for decolorization, and the solution after decolorization is dried to obtain 1.9 kg of refined stevioside, and the content of stevioside A in this refined stevioside is 88%; Ethanol and excess water were evaporated from the liquid obtained by solid-liquid separation, the concentration of the aqueous solution of stevioside A was adjusted to 1%, the solution was passed through a 30-mesh molecular sieve, decolorized by adding activated carbon, and 7.1 kg of refined stevioside was obtained after drying. The total recovery rate of stevioside was 90%.

specific Embodiment 2

[0012] Select 10kg of stevioside with stevioside A content of 24% and mix with 17kg of ethanol, dissolve at 70°C for 32 hours, stir the mixture for 15 minutes every 2.5 hours, and separate the dissolved mixture through a plate and frame filter press for solid-liquid separation , the filtered solid is added with anhydrous salt water and the concentration is adjusted to 0.5% (weight), and activated carbon is added for decolorization, and the solution after decolorization is dried to obtain 2.4kg of refined stevioside, and the content of stevioside A in this refined stevioside is 89%; the liquid obtained by solid-liquid separation is evaporated to remove ethanol and excess water, the concentration of stevioside aqueous solution is adjusted to 0.5%, the solution is passed through a 50-mesh molecular sieve, and activated carbon is added for decolorization, and refined stevioside is obtained after drying Glycoside 6.6kg. The overall recovery of stevioside was 90%.

specific Embodiment 3

[0013] Select 10kg of stevioside with 40% stevioside A content and mix with 15kg of ethanol, dissolve at 40°C for 24 hours, stir the mixture for 15 minutes every 2.5 hours, and separate the dissolved mixture through a plate and frame filter press for solid-liquid separation , the filtered solid is added with anhydrous salt water to adjust the concentration to 0.75%, and activated carbon is added for decolorization, and the decolorized solution is dried to obtain 3.7kg of refined stevioside, and the content of stevioside A in the refined stevioside is 91%; Ethanol and excess water were evaporated from the liquid obtained by solid-liquid separation, the concentration of the stevioside aqueous solution was adjusted to 0.75%, the solution was passed through a 70-mesh molecular sieve, decolorized by adding activated carbon, and 5.4 kg of refined stevioside was obtained after drying. The overall recovery of stevioside was 91%.

[0014] In the present invention, the concentration of ...

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Abstract

The present invention adopts ethyl alcohol as reinfing solvent, and adopts the following steps: mixing stevioside and ethyl alcohol according to a certain proportion, stirring in dissolving process, solid-liquid separation of dissolved mixture, respectively decolouring obtained solid and liquid, drying to obtain refined stevoiside, in which the refined solid content is up to 88%, and its total recorery rate is high, and the refined stevioside is colourless, and has no abrormal taste.

Description

[0001] The invention relates to a method for refining stevioside. Background technique [0002] Stevioside is the extract from the leaves of Stevia rebaudiana. The extract is composed of various steviosides, among which the content of stevioside A is generally about 24%, and the quality of stevioside A is the best. Since the stevioside directly extracted from the leaves of Stevia rebaudiana contains a lot of impurities, pigments and peculiar smell, it cannot be directly used as a food additive or other purposes, and the impurities, pigments and peculiar smell need to be removed. Usually, the method of refining stevioside is to use methanol as a solvent to extract stevioside. Due to the high toxicity of methanol, poor sealing will cause poisoning to operators during the operation process. The solubility in methanol is similar, and various steviol glycosides cannot be separated after refining, and because stevioside A has the highest sweetness and the b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07H1/06C07H15/20
Inventor 孙景文
Owner 青岛创升生物科技有限公司
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