High-concentration aqueous solutions of betaines or amine oxides
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United States of America Patent
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Apr 25, 2006
Grant Date -
Aug 28, 2003
app pub date -
Feb 21, 2003
filing date -
Feb 23, 2002
priority date (Note) -
Expired
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Abstract
The present invention relates to a composition and a method for preparing high-concentration aqueous solutions of betaines or amine oxides which comprise a water-soluble carbohydrate. The high-concentration aqueous solutions of the present invention are pumpable, viscous liquids which are self preserving and remain storage stable for long periods without any bacterial decomposition. The high-concentration aqueous solutions of the present invention are prepared by adding a water-soluble carbohydrate such as cyclodextrins or dextrans to an aqueous solution of the betaine or amine oxide and concentrating the aqueous solution to provide the high-concentration aqueous solution.
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