Solution mining of carbonate/bicarbonate deposits to produce soda ash
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United States of America Patent
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Jun 16, 1998
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N/A
app pub date -
May 21, 1996
filing date -
May 21, 1996
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Abstract
A solution mining process for recovering sodium values from an underground deposit of a sodium bicarbonate containing ore is disclosed. The process involves contacting the ore with an aqueous sodium carbonate-containing solution to produce a dilute brine which is stripped with steam to reduce the bicarbonate content and increase the carbonate content. The dilute carbonate/bicarbonate solution from the stripper is fed to a sodium carbonate decahydrate crystallizer to produce pure sodium carbonate decahydrate crystals and a mother liquor containing less than about 4% sodium bicarbonate.
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