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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

Inactive Publication Date: 2011-12-21
安徽亚强生物工程股份有限公司
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Problems solved by technology

[0006] At present in our country, there are very few manufacturers of stevioside, and they still use traditional technology, and their production technology is still at the level of the 1990s. During the production process, boiling water is used for extraction, evaporation and concentration, and the content of impurities in the extract is high. , so there will be defects such as high loss of active ingredients, low yield, difficulty in achieving high purity products, long process time, low efficiency, and large energy consumption.

Method used

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Embodiment Construction

[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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Abstract

The invention discloses a method for extracting and separating steviol glycosides by using vacuum low-temperature extraction. The steps are successively raw material crushing, vacuum low-temperature extraction, centrifugal filtration, secondary vacuum low-temperature extraction and centrifugal filtration, flocculation precipitation, filtration, gradient membrane separation, gradient Eluted, concentrated and dried to obtain the product. The steviol glycoside extracted by the invention has high purity and high activity, and the extraction method is easy to implement industrialized production, and the cost is greatly reduced, creating a new way for the production of stevioside.

Description

technical field [0001] The invention relates to the field of food, in particular to a method for separating steviol glycosides through vacuum and low temperature extraction. Background technique [0002] Stevia is a perennial herb of Asteraceae, which was successfully transplanted in my country in the 1950s. Stevia glycosides have been widely used in the fields of food and medicine. [0003] Steviol glycoside is a sweetener that is safe for humans. Stevioside can not only improve the taste of obese patients and diabetic patients, reduce the intake of sugar, but also treat high blood pressure and diabetes to a certain extent. [0004] Sucrose (sucrose is a disaccharide with fructose and glucose as the main components) has the effect of increasing serum cholesterol. Excessive intake can cause metabolic disorders, digestive disorders or excretion disorders. Nutritionists once pointed out: "white sugar is the cause of all diseases." the culprit". However, stevia has the follow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C07H15/24C07H1/08
Inventor 李光祥余顺火
Owner 安徽亚强生物工程股份有限公司
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