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Process for purifying stevia glycosides by multi-column resin series connection and alcoholic absorption

A technology of stevioside and resin, which is applied in the field of preparation and purification of stevioside, can solve problems such as difficulty in meeting international market requirements, and achieve the effects of no bad aftertaste, better taste, and improved purity

Inactive Publication Date: 2012-11-21
PURECIRCLE JIANGXI BIOTECH CO LTD
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  • Abstract
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  • Claims
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Problems solved by technology

At present, the market demand for high-purity stevioside products with glucoside content ≥ 95% is increasing, and they are sought after by the international market. ≤90%, it is difficult to meet the requirements of the international market

Method used

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  • Process for purifying stevia glycosides by multi-column resin series connection and alcoholic absorption

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Embodiment Construction

[0014] The present invention will be further described in detail below in conjunction with the examples.

[0015] (a) Pretreatment: Mix stevia leaf powder with demineralized water at 50°C-55°C at a ratio of 1:15, and use continuous countercurrent extraction to prepare stevioside extract, which undergoes two passes of flocculation sedimentation and plate-and-frame filter press process, the light transmittance of the filtrate after plate and frame filtration is 60.3%, and the filtrate enters the next process;

[0016] (b) Desalination: Desalt the above filtrate with 732 cation and YW-07t anion exchange resin to obtain a desalted filtrate with a light transmittance of 78.0% and a conductivity of 2290μs / cm, and the desalted filtrate enters the next process; after adsorption The liquid, that is, the adsorption waste liquid, is discharged into rivers after biochemical treatment reaches the national second-class discharge standard;

[0017] (c) Adsorption analysis: use YW-03F resin ...

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Abstract

The invention discloses a process for purifying stevia glycosides by multi-column resin series connection and alcoholic absorption. A high-purity stevia glycoside product can be prepared through procedures such as pretreatment, desalination, primary adsorption and desorption, decoloration, primary ion exchange, secondary adsorption and desorption, secondary ion exchange and spray drying of crushed stevia leaves. According to the process, different components of stevia glycosides are different in solubility in the same solvent, adsorbent resins have different adsorptive selectivity principles for different components of stevia glycosides, and the multi-column adsorbent resin series connection is used for absorbing alcoholic liquids, so that the purity of stevia glycosides can be improved, the glycoside content of the obtained stevia glycoside product can exceed 95% and the specific absorptivity is no more than 0.02. Compared with common stevia glycoside products with the purity of 90%, the high-purity stevia glycoside product has the advantages of being high in purity, high in sweetness, pure in taste, free of bad remaining taste and the like.

Description

technical field [0001] The invention relates to a preparation and purification technology of stevioside, in particular to a method for purifying stevioside by multi-column resin series connection and adsorption with alcohol. Background technique [0002] Stevioside is a new type of pure natural sweetness extracted from the leaves of stevia, a herb of Compositae, with high sweetness, low calorie, good taste, safety and non-toxicity, and very good market prospects. agent; can be widely used in food, beverage, medicine, daily chemical industry and other industries. Stevioside is a multi-component glycoside mixture. There are currently 9 known sweet components, and its sweetness and taste depend on the glycoside components and total glycoside content. At present, the market demand for high-purity stevioside products with glucoside content ≥ 95% is increasing, and they are sought after by the international market. ≤90%, it is difficult to meet the requirements of the internatio...

Claims

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Application Information

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IPC IPC(8): C07H15/256C07H1/08
Inventor 陈家红
Owner PURECIRCLE JIANGXI BIOTECH CO LTD
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