Electrodialyzed compositions and method of treating aqueous solutions using electrodialysis
AssigneeKraft Foods Holdings, Inc.
InventorsColin Crowley, Jimbay Loh
Life of this patent
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Abstract
An electrodialysis system is used to produce electrodialyzed compositions with altered pH but without objectionable odor and taste. An aqueous solution is contacted with a membrane electrodialysis system and an electrical potential is applied in an amount effective for changing the pH of the aqueous solution by at least about 2.0 and for providing an electrodialyzed composition having a total cation or anion concentration of about 1.0N or less, and individual cation or anion concentration of about 0.6N of less, and a free chlorine content of about 2 ppm or less.
Claims15
1-8. (canceled)
An electrodialyzed composition suitable for human consumption, the composition comprising a total cation concentration of 1.0N or less, individual cation concentration of 0.6N or less, a free chlorine content of 1 ppm or less, and a pH of 5.0 or less.
An electrodialyzed composition suitable for human consumption, the composition comprising a total anion concentration of 1.0N or less, individual anion concentrations are 0.6N or less, a free chlorine content of 1 ppm or less, and a pH of 8.0 or greater.
An electrodialyzed composition suitable for human consumption prepared by a method comprising:
- contacting an aqueous solution having a total anion or total cation concentration of 1.8 N or less with a membrane electrodialysis system, the membrane electrodialysis system including at least one bipolar membrane in between a plurality of cationic membranes or a plurality of anionic membranes, all of the membranes being disposed between a cathode electrode and an anode electrode;
- applying an electrical potential across the anode and cathode for a time effective for changing the pH of the aqueous solution by at least 2.0 and providing an electrodialyzed composition having a total anion or total cation concentration of 1.0N or less, individual cation or anion concentration of 0.6N or less, and a free chlorine content of 1 ppm or less.
Dependencies are inferred from the claim text.