CPC C01F 11/183 (2013.01) [C04B 2/10 (2013.01)] | 23 Claims |
1. A method comprising:
a) calcining limestone to form carbon dioxide and calcium compound comprising calcium oxide, wherein the limestone comprises magnesium carbonate, and wherein the calcium oxide comprises soft burnt lime;
b) treating the calcium compound with N-containing salt in water to produce an aqueous solution comprising calcium salt and solid; and
c) contacting the aqueous solution comprising calcium salt and solid with the carbon dioxide to produce a precipitation material comprising calcium carbonate and solid wherein the calcium carbonate comprises vaterite.
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