Crystallization of sodium carbonate decahydrate from liquors supersaturated in sodium bicarbonate
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United States of America Patent
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Mar 28, 2006
Grant Date -
May 22, 2003
app pub date -
Nov 18, 2002
filing date -
Nov 21, 2001
priority date (Note) -
Expired
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Abstract
A process for recovering sodium carbonate decahydrate crystals from solutions and mother liquors supersaturated in sodium bicarbonate concentration. Feed liquors containing higher levels of sodium bicarbonate than traditionally fed to a sodium carbonate decahydrate crystallizer are used to create a mother liquor within a sodium carbonate decahydrate crystallizer that is supersaturated with respect to sodium bicarbonate. Substantially pure sodium carbonate decahydrate crystals may be precipitated from the supersaturated mother liquor without substantially precipitation of sodium bicarbonate containing crystals.
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