Title:
HIGHLY EFFICIENT STEVIOSIDE MIXTURE PREPARATION METHOD
Document Type and Number:
WIPO Patent Application WO/2020/077970
Kind Code:
A1
Abstract:
Provided in the present invention is a highly efficient stevioside mixture preparation method, the preparation method comprising the following steps: (1) placing crude stevioside into a sealed pressure-resistant system or apparatus, and adding 2-3 times the weight of the crude stevioside in ethanol at a concentration of 70%-95%, so as to dissolve into a crystallization mother liquor; (2) introducing carbon dioxide into the sealed pressure-resistant system; (3) beginning crystallization when the pressure in the sealed pressure-resistant system is 0.01 Mpa-0.5 Mpa, and the pH of the crystallization mother liquor is 4.5-5.3, crystallization time being 1-2 hours; (4) completing crystallization and filtering or centrifugating liquid, thereby obtaining pure stevioside crystals. The present invention has the following beneficial effects: compared to the prior art, the technical solution of the present invention does not require heating, and crystallization time is significantly shortened; the total glycoside content of stevia obtained by the stevioside crystallization of the present invention is as high as 99.11%, and rebaudioside A content is as high as 99.06%.
More Like This:
| WO/2020/176602 | NOVEL MOGROSIDES AND USES OF THE SAME |
| JPS6036437 | ANTHRACYCLINE DERIVATIVE AND MANUFACTURE |
| JPS5980692 | NOVEL ANTHRACYCLINEGLYCOSIDES |
Inventors:
YANG WENGUO (CN)
XIE YONGFU (CN)
SONG YUNFEI (CN)
XIE YONGFU (CN)
SONG YUNFEI (CN)
Application Number:
PCT/CN2019/083509
Publication Date:
April 23, 2020
Filing Date:
April 19, 2019
Export Citation:
Assignee:
GUILIN LAYN NATURAL INGREDIENTS CORP (CN)
International Classes:
C07H15/24; C07H1/08
Domestic Patent References:
| WO2011094423A1 | 2011-08-04 |
Foreign References:
| CN109456371A | 2019-03-12 | |||
| CN102146106A | 2011-08-10 | |||
| CN102351925A | 2012-02-15 | |||
| CN102766178A | 2012-11-07 | |||
| CN102766177A | 2012-11-07 |
Attorney, Agent or Firm:
NANNING SHUHUA INTELLECTUAL PROPERTY AGENCY et al. (CN)
Download PDF: