PROCESS FOR PRODUCING CEMENT BINDER COMPOSITIONS CONTAINING MAGNESIUM
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United States of America Patent
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Issued Date -
Aug 22, 2013
app pub date -
Aug 18, 2011
filing date -
Sep 2, 2010
priority date (Note) -
Abandoned
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Abstract
A process for producing a cement binder composition including one or more magnesium carbonates having the general formula w MgCO3. x MgO. y Mg(OH)2 . z H2O in which w is a number equal to or greater than 1, at least one of x, y and z is a number greater than 0 and w, x, y and z may be (but need not be) integers is described. The process is characterised by (a) heating magnesite to liberate carbon dioxide gas and produce a solid product including magnesium oxide and (b) contacting an aqueous mixture including the magnesium oxide produced in step (a) with a source of carbonate ions at a temperature in the range 25 to 120° C. to produce at least one of the magnesium carbonates.
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