Process for the production of sodium carbonate
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United States of America Patent
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Nov 12, 2002
Grant Date -
Jul 12, 2001
app pub date -
Sep 11, 1998
filing date -
Sep 11, 1997
priority date (Note) -
Expired
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Abstract
A process for the production of sodium carbonate monohydrate is disclosed. The process includes heating a feed stream containing trona and insoluble impurities in a calcining apparatus to a temperature of less than about 350.degree. C. to form anhydrous sodium carbonate. The anhydrous sodium carbonate is contacted with a saturated sodium carbonate brine solution to form sodium carbonate monohydrate crystals. Sodium carbonate monohydrate crystals are separated from insoluble impurities.
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