Process for distillation-crystallization of zinc carbonate

Details Process for distillation-crystallization of zinc carbonate Process for distillation-crystallization of zinc carbonate

C - Chemistry, Metallurgy

01

G

23/14

C01G 9/00 (2006.01) B01D 9/00 (2006.01)

Patent

CA 1260225

PROCESS FOR DISTILLATION-CRYSTALLIZATION OF ZINC CARBONATE ABSTRACT OF THE DISCLOSURE A process for distillation-crystallization of a zinc carbonate which is characterized in that a distillation column having a plurality of plates or trays is used for crystallizing basic zinc carbonate (2ZnCO3 . 3Zn(OH)2 or ZnCO3 . 3Zn(OH)2 . H2O) from a solution of basic zinc ammonium carbonate (Zn(NH3)4CO3); said solution is fed to an upper portion of the distillation column, while heating a bottom portion of the distillation column, to effect a distillation operation.

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