Method for obtaining sodium carbonate crystals

Details Method for obtaining sodium carbonate crystals Method for obtaining sodium carbonate crystals

C - Chemistry, Metallurgy

01

D

C01D 7/07 (2006.01) C01B 31/20 (2006.01) C01D 7/24 (2006.01) C01F 11/28 (2006.01) C25B 1/16 (2006.01) C25B 1/26 (2006.01)

Patent

CA 2599510

Method for producing sodium carbonate, according to which an aqueous sodium chloride solution (5) is electrolyzed in a membrane-type cell (1) from which an aqueous sodium hydroxide solution (9) is collected, and carbonated by direct contact with carbon dioxide (15) to form a slurry of crystals of a sodium carbonate (16), and the slurry or its mother liquor is evaporated (3) to collect sodium carbonate (18).

L~invention concerne un procédé pour produire du carbonate de sodium, selon lequel une solution aqueuse de chlorure de sodium (5) est électrolysée dans un cellule à membrane (1) à partir de laquelle une solution aqueuse d'hydroxyde de sodium (9) est recueillie et saturée en dioxyde de carbone par contact direct avec le dioxyde de carbone (15) pour former une suspension épaisse de cristaux de carbonate de sodium (16) ; la suspension épaisse ou sa liqueur mère est ensuite évaporée (3) pour recueillir le carbonate de sodium (18).

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