Production method for high-purity calcite and ammonium sulphate by using gypsum
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United States of America Patent
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Dec 1, 2015
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Jun 12, 2014
app pub date -
Jul 13, 2012
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Jul 15, 2011
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Abstract
Provided is a recycling method for producing calcite and ammonium sulfate having a high purity of at least 95% and generated by means of a carbonation reaction for fixing carbon dioxide inside the crystal structure of a mineral, and in which waste gypsum is reacted with carbon dioxide, which is a greenhouse gas, such that the carbon dioxide is fixed as a stable mineral, and high-purity calcite and ammonium sulfate are produced as resultant products.
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