Method of producing metal carbonate from an ultramafic rock material
AssigneeAgency for Science, Technology and Research
InventorsJie Bu, Tze Yuen Yeo, Paul Sharratt
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Abstract
A method of producing a metal carbonate from an ultramafic rock material is provided. The method includes providing an ultramafic rock material comprising a metal silicate; reacting the ultramafic rock material with an acid to form a mixture comprising a salt of the metal; contacting the mixture comprising a salt of the metal with oxygen so as to aerate impurities in the mixture and/or to remove residual acid from the mixture; heating the resultant mixture to decompose the salt of the metal to form metal oxide; and reacting the metal oxide with aqueous ammonium carbonate to obtain the metal carbonate. A system for producing a metal carbonate from ultramafic rock material is also provided.
Claims20
A method of producing a metal carbonate from an ultramafic rock material, the method comprising
- a) providing an ultramafic rock material comprising a metal silicate;
- b) reacting the ultramafic rock material with an acid to form a mixture comprising a salt of the metal;
- c) contacting the mixture comprising a salt of the metal with oxygen so as to aerate impurities in the mixture and/or to remove residual acid from the mixture;
- d) heating the resultant mixture from step c) to decompose the salt of the metal to form metal oxide;
- and
- e) reacting the metal oxide with aqueous ammonium carbonate to obtain the metal carbonate.
A system for producing a metal carbonate from ultramafic rock material, the system comprising
- a) a reactor configured to carry out reaction of an ultramafic rock material with an acid to form a mixture comprising a salt of the metal;
- b) an air stripper column configured to contact the mixture comprising a salt of the metal with oxygen so as to aerate impurities in the mixture and/or to remove residual acid from the mixture;
- c) a furnace configured to heat the resultant mixture from step b) to decompose the salt of the metal to form the metal oxide;
- and
- d) a precipitator configured to carry out reaction of the metal oxide with aqueous ammonium carbonate to obtain the metal carbonate.
Dependencies are inferred from the claim text.