EXTRACTION OF LESS POLAR IMPURITIES FROM SUCRALOSE CONTAINING AQUEOUS FEED STREAMS
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United States of America Patent
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Issued Date -
Oct 15, 2009
app pub date -
Apr 1, 2009
filing date -
Apr 3, 2008
priority date (Note) -
Abandoned
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Abstract
A process for the purification of sucralose containing aqueous feed streams is disclosed. The process comprises the step of extracting an aqueous feed stream comprising sucralose and impurities less polar than sucralose, such as tetrachloro saccharides, with an organic solvent that is immiscible with water, such as ethyl acetate. In this step, the mass ratio of organic solvent to aqueous feed stream is in the range of 0.4 to 0.9. Greater than 50% of the sucralose and greater than 95% of the tetrachloro saccharide impurities are extracted into the organic extract. The organic extract is back extracted with water and the resulting aqueous extract recycled to the initial extraction step.
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