Rebaudioside a composition and method for purifying rebaudioside a
AssigneeThe Coca-Cola Company
InventorsIndra Prakash, Mani Upreti, Grant E. DuBois, George A. King, Anish Mehta
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Abstract
Exemplary embodiments of this invention encompass a method for purifying a low purity steviol glycoside composition. In particular, this invention relates to a method for purifying low purity steviol glycoside compositions to obtain substantially pure steviol glycoside compositions comprising approximately 95% or greater steviol glycosides and approximately 75% or greater rebaudioside A with a single crystallization step.
Claims25
A method for purifying a low purity rebaudioside A composition comprising the steps of:
- combining a low purity rebaudioside A composition and an organic solvent to form a low purity rebaudioside A solution, the low purity rebaudioside A composition comprising rebaudioside A in a purity less than about 60% by weight on a dry basis and the organic solvent further comprising water in an amount from about 10 to about 25% by weight;
- and
- crystallizing from the low purity rebaudioside A solution in a single step a substantially pure mixture of steviolglycosides comprising rebaudioside A and one or more other steviolglycosides selected from the group consisting of rebaudioside B, rebaudioside C, rebaudioside D, rebaudioside E, rebaudioside F, stevioside, dulcoside A, rubusoside, and steviolbioside,
- wherein the steviolglycosides are present in the substantially pure mixture of steviol glycosides in an amount greater than about 95% by weight on a dry basis,
- wherein the rebaudioside A is present in the substantially pure mixture of steviol glycosides in an amount greater than about 85% by weight on a dry basis, and
- wherein the mass yield of the rebaudioside A is greater than about 20% by weight and the mass yield of the steviol glycosides is greater than about 25% by weight.
A method for purifying a low purity rebaudioside A composition comprising the steps of:
- combining a low purity rebaudioside A composition and an organic solvent to form a low purity rebaudioside A solution, the low purity rebaudioside A composition comprising rebaudioside A in a purity less than about 60% by weight on a dry basis and the organic solvent optionally further comprising water in an amount up to about 25% by weight;
- and
- crystallizing from the low purity rebaudioside A solution in a single step a substantially pure mixture of steviol glycosides comprising rebaudioside A and one or more other steviol glycosides selected from the group consisting of rebaudioside B, rebaudioside C, rebaudioside D, rebaudioside F, stevioside, dulcoside A, rubusoside, and steviolbioside,
- wherein the steviol glycosides are present in the substantially pure mixture of steviol glycosides in an amount greater than about 95% by weight on a dry basis,
- wherein the rebaudioside A is present in the substantially pure mixture of steviol glycosides in an amount greater than about 75% by weight on a dry basis, and
- wherein the mass yield of the rebaudioside A is greater than about 20% by weight and the mass yield of the steviol glycosides is greater than about 25% by weight.
Dependencies are inferred from the claim text.