Method for purifying by nanofiltration an aqueous sugary solution containing monovalent and polyvalent anions and cations
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United States of America Patent
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Jun 27, 2006
Grant Date -
Sep 29, 2005
app pub date -
Aug 27, 2003
filing date -
Sep 6, 2002
priority date (Note) -
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Abstract
A purification method employs nanofiltration of an aqueous solution containing one or several sugars, multivalent cations, monovalent metal cations, monovalent anions and multivalent inorganic anions and/or organic acid anions. The method includes replacement of at least a part of said multivalent cations and/or said multivalent inorganic anions and organic acid anions respectively by monovalent metal cations and/or monovalent anions to produce a solution. Nanofiltration of the solution is carried out to obtain a retentate, and at least part of the retentate is subject to crystallization.
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