CN102260302A - Novel method for separating stevioside - Google Patents
Novel method for separating stevioside Download PDFInfo
- Publication number
- CN102260302A CN102260302A CN2010101851258A CN201010185125A CN102260302A CN 102260302 A CN102260302 A CN 102260302A CN 2010101851258 A CN2010101851258 A CN 2010101851258A CN 201010185125 A CN201010185125 A CN 201010185125A CN 102260302 A CN102260302 A CN 102260302A
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- CN
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- filtrate
- novel method
- steviosides
- separating
- sodium hydroxide
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Abstract
The invention relates to a novel method for separating stevioside. According to the invention, a safe chemical substance is taken as a bactericide and added into a stevioside filtrate, thereby the novel method solves the sterilization problem in the process of absorbing the filtrate by the resin and simultaneously improves a subsequent technology for purifying stevioside. Compared with a traditional sterilization method, the technology of the invention is more safe, more long-acting and cheaper, and is easy to be implemented in actual production of factories.
Description
Affiliated technical field
The present invention relates to a kind of separation method of Steviosides, especially can be fine sterilization problem in the extraction of solution Steviosides, flocculation rear filtrate.
Background technology
At present, Steviosides mainly is that water or hot water extract glucoside as solvent from Folium Chrysanthemi, and extraction liquid separates purification by macroporous adsorbent resin selective adsorption Steviosides to it behind chemical flocculation.But, Folium Chrysanthemi is a kind of farm crop of peasant household's plantation, before entering factory, do not pass through sterilising treatment, and factory's each batch leaf extraction process generally needs 4-8 hour, to such an extent as in extraction process, grow a lot of bacteriums, though can remove microorganism more than 95% by chemical flocculation and through filtering method, but microbial reproduction is very fast in the filtrate filtered, if once more filtrate is not carried out the sterilization sterilising treatment, the microbial growth breeding will cause the part Steviosides to be degraded and influence the production and processing technology of postorder.
Summary of the invention
For overcoming above-mentioned deficiency, the invention provides a kind of separation method of Steviosides, present method can solve the sterilization problem in the filtrate, makes the resin separation purification Steviosides well to carry out.
The technical solution adopted for the present invention to solve the technical problems is: with lime or sodium hydroxide (for taking all factors into consideration of economy and effect, lime adds ratio 0.5 ‰, sodium hydroxide adds ratio 1.0 ‰, below all are ratios with water) as the pH regulator agent of Steviosides filtrate, the ionization in filtrate of calcium hydroxide or sodium hydroxide goes out hydroxide ion, filtrate pH is remained on more than 11, thereby reach the purpose that suppresses kill bacteria by very alkaline water environment bacteria growing inhibiting breeding, experimental data shows that present method can kill the bacterium more than 99.9%.Because it is slower that filtrate pH changes, have only after filtrate has absorbed carbon dioxide in air just to descend to some extent, so the filtrate that obtains is in the bacteriostatic state with long-time (above 120 hours), absorption with macroporous adsorbent resin is separated be easy to carry out.Calcium hydroxide also has the effect of flocculate and clarify, and the high alkalinity filtrate that obtains is high about two percentage points without the quality of the Steviosides of adjusting PH with base through the Steviosides ratio of resolving behind the absorption with macroporous adsorbent resin.
The invention has the beneficial effects as follows: lime and sodium hydroxide all are the materials of the easy cheapness that obtains, the sterilization cost is low, the filtrate that obtains is more clarified than traditional method, reduce solvability organic impurity content in the waste water, reduce cost for wastewater treatment, lime and sodium hydroxide are harmful, long-acting, the economic sterilant of safety non-toxic.In factory's actual production, implement easily.
Claims (4)
1. a Steviosides novel method for separating adds in the filtrate as sterilant with lime or sodium hydroxide, and concentration is controlled concrete concentration according to actual needs usually at 0.5-1.5 ‰.
2. the method for a kind of Steviosides novel method for separating of employing according to claim 1 is characterized in that: behind the filtrate process adjusting PH with base, and its pH 〉=11.
3. the method for a kind of Steviosides novel method for separating of employing according to claim 1 is characterized in that: lime is calcium oxide or calcium hydroxide, purity 〉=50%; Sodium hydroxide (solid-state), purity 〉=90%, sodium hydroxide (liquid), concentration 〉=30%.
4. the method for a kind of Steviosides novel method for separating of employing according to claim 1 is characterized in that: used lime is calcium oxide or calcium hydroxide, and sodium hydroxide is solid-state or liquid, adds concentration and is 0.5-1.5 ‰ with the filtrate ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101851258A CN102260302A (en) | 2010-05-28 | 2010-05-28 | Novel method for separating stevioside |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101851258A CN102260302A (en) | 2010-05-28 | 2010-05-28 | Novel method for separating stevioside |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102260302A true CN102260302A (en) | 2011-11-30 |
Family
ID=45007162
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101851258A Pending CN102260302A (en) | 2010-05-28 | 2010-05-28 | Novel method for separating stevioside |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102260302A (en) |
-
2010
- 2010-05-28 CN CN2010101851258A patent/CN102260302A/en active Pending
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111130 |