Patent ID: 8501261
Filing Date: 2013-08-06
Classification: A23L

Abstract:
1. A process for purifying Rebaudioside C from Stevia extract comprising the steps of: a. providing an extract of b. dissolving the extract in a first aqueous alcoholic solution to obtain a first mixture, wherein the first aqueous alcoholic solution is an ethanol-water solution, with 75-99% ethanol; c. inducing crystallization in the first mixture; d. filtering the first mixture to obtain a first precipitate and a first filtrate; e. drying the first filtrate; f. dissolving the dried first filtrate in a second aqueous alcoholic solution to obtain a second mixture, wherein the second aqueous alcoholic solution is a methanol-water solution with 70-99% methanol; g. inducing crystallization in the second mixture; h. filtering the second mixture to obtain a second precipitate and a second filtrate; i. adding a third aqueous alcoholic solution into the second filtrate to obtain a third mixture, wherein the third aqueous alcoholic solution is an ethanol-water solution with 10-99% ethanol; j. inducing crystallization in the third mixture; k. filtering the third mixture to obtain a third precipitate and a third filtrate; l. suspending the third precipitate in a fourth aqueous alcoholic solution to obtain a fourth mixture, wherein the fourth aqueous alcoholic solution is an ethanol-water solution with 80-99% ethanol; m. filtering the fourth mixture to obtain a fourth precipitate and a fourth filtrate; and n. drying the fourth filtrate to yield purified Rebaudioside C.