A process for the purification of aqueous feed streams containing
sucralose comprises: a) extracting an aqueous feed stream comprising
sucralose with a first organic solvent and producing a first organic
extract and a first aqueous extract, in which the organic solvent is
immiscible with water, and a portion of the sucralose passes into the
first organic extract; b) optionally extracting the first organic extract
with an aqueous solvent to produce a second organic extract and a second
aqueous extract, in which the sucralose preferentially passes into the
second aqueous extract, and in which the second aqueous extract is
recycled to step a); c) concentrating the first aqueous extract to form a
concentrated aqueous feed stream; and d) extracting the concentrated
aqueous feed stream with a second organic solvent and producing a third
organic extract and a third aqueous extract, in which the second organic
solvent is immiscible with water, and in which the sucralose
preferentially passes into the third organic extract.
A process for the purification of aqueous feed streams containing
sucralose-6-esters comprises the steps of: a) providing an aqueous feed
stream comprising a carbohydrate selected from the group consisting of
sucralose 6-esters, and mixtures thereof with sucralose; b) concentrating
the aqueous feed stream to form a concentrated aqueous feed stream; and
c) extracting the concentrated aqueous feed stream with an organic
solvent and producing an organic extract and an aqueous extract, in which
the organic solvent is immiscible with water, and in which the
carbohydrate preferentially passes into the organic extract.