C - Chemistry – Metallurgy – 01 – F
Patent
C - Chemistry, Metallurgy
01
F
23/103, 23/22
C01F 5/24 (2006.01) C01D 3/16 (2006.01) C01F 11/46 (2006.01)
Patent
CA 1074528
A B S T R A C T A process for treating "brine mud" as produced in brine purification processes and for the coproduction of a calcium sulphate and magnesium carbonate which comprises (1) carbonating a slurry of "brine mud" in sodium chloride brine with carbon dioxide to produce a slurry or solids comprising calcium carbonate and n liquor comprising magnesium bicarbonate and sodium chloride. (ii) separating the slurry produced by the carbonation stage (i) into moist solid calcium carbonate and a liquor comprising magnesium bicarbonate and sodium chloride. (iii) heating the liquor from (ii) to produce a slurry of solids comprising magnesium cartonate, a liquor comprising sodium chloride, and gaseous carbon dioxide. (iv) separating the slurry from (iii) into moist hydrated magnesium carbonate and a liquor comprising sodium chloride and (v) drying the moist hydrated magnesium carbonate. (vi) slurrying the calcium carbonate from stage (ii) with a water and interacting said slurry with sulphuric acid to produce a slurry comprising calcium sulphate in the solid phase and gaseous carbon dioxide. (vii) separating moist calcium sulphate from the slurry produced in stage (vi) and (viii) drying the moist calcium sulphate from stage (vii) to give a dry calcium sulphate.
254107
Berrie John S.
Woolley Graham E.
LandOfFree
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