Process for distillation-crystallization of zinc carbonate

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

1985-12-24

1987-12-01

Capossela, Ronald C.

Refrigeration

Processes

Fractionally solidifying a constituent and separating the same

203 48, 423105, 423356, 423420, 423622, B01D 308

Patent

active

047102152

ABSTRACT:
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 (2ZnCO.sub.3.3Zn(OH).sub.2 or ZnCO.sub.3.3Zn(OH).sub.2 H.sub.2 O) from a solution of basic zinc ammonium carbonate (Zn(NH.sub.3).sub.4 CO.sub.3); 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.

REFERENCES:
patent: 3713991 (1973-01-01), Thomas
patent: 3929598 (1975-12-01), Stern et al.
patent: 4061718 (1977-12-01), Verlaeten et al.
patent: 4140586 (1979-02-01), Kwasnoski et al.

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