Process for preparing soda ash from solution mined bicarbonate brines
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United States of America Patent
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Jul 8, 2003
Grant Date -
Dec 19, 2002
app pub date -
Jun 13, 2001
filing date -
Jun 13, 2001
priority date (Note) -
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Abstract
A method for producing high grade soda ash from a solution mined brine containing sodium bicarbonate by processing the mine brine through a monohydrate crystallization step to the final product is described. The mine brine is treated to decompose and thereby convert sodium bicarbonate to sodium carbonate and to concentrate the sodium carbonate to a concentration such that a feed liquor is formed which is suitable for crystallizing sodium carbonate monohydrate crystals of high purity from the feed liquor. The sodium carbonate monohydrate crystals recovered from the process are converted to soda ash by known techniques.
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