Bicarbonate conversion in a carbonate monohydrate process
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United States of America Patent
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Jun 10, 2003
Grant Date -
Jan 9, 2003
app pub date -
Jun 13, 2001
filing date -
Jun 13, 2001
priority date (Note) -
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Abstract
A method for converting sodium bicarbonate in a sodium carbonate monohydrate crystallization process to maintain a mother liquor composition in a sodium carbonate monohydrate crystallizer below the invariant point for the crystallizer for reducing or eliminating the cocrystallization of sodium sesquicarbonate crystals in the process. The mother liquor composition may be maintained below the invariant point by stripping carbon dioxide from a feed solution or from mother liquor recycled to the crystallizer.
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