Method of preparing calcium carbonate using direct carbonation reaction
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United States of America Patent
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Nov 29, 2016
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Feb 19, 2015
app pub date -
Aug 15, 2014
filing date -
Aug 19, 2013
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Abstract
Disclosed is a method of preparing calcium carbonate using a direct carbonation reaction. The method includes dissolving fuel gas desulfurization gypsum into an ammonia solution, performing a filtering process after making a carbonation reaction by feeding carbon dioxide into the ammonia solution in which the fuel gas desulfurization gypsum is dissolved, and performing a filtering process after precipitating the calcium carbonate by maintaining a filtered solution in a stationary state.
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