High-purity rebaudioside A and method of extracting same
US7923541B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 2007 |
| Grant date | Apr 12, 2011 |
| Priority date | — |
| Expiry date | Dec 17, 2027 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA23L33/105
- WIPO fieldFood chemistry
- WIPO sectorChemistry
Abstract
A process for recovering Rebaudioside A from Stevia rebaudiana Bertoni plants is provided and includes the steps of sequentially extracting plant material with a first solvent to obtain a first extract, filtering the first extract and passing the first extract through a polar resin to obtain a filtrate, and purifying the filtrate to obtain a crystalline-containing material. With further purification, a product containing over 99% Rebaudioside A is obtained. The present invention is also directed toward a method of purifying stevia glycosides to obtain purified Rebaudioside A. In one embodiment, the method includes silica gel column chromatography using an solvent comprising ethyl acetate and ethanol.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.