Process for the continuous production of high purity...

Details Process for the continuous production of high purity... Process for the continuous production of high purity...

2005-03-22

2005-03-22

Valentine, Donald R. (Department: 1742)

Electrolysis: processes, compositions used therein, and methods

Electrolytic synthesis

Preparing single metal

C423S101000, C423S109000

Reexamination Certificate

active

06869520

ABSTRACT:
The invention relates to a process involving the following steps: a) performing leaching of the raw material with an acid aqueous solution to dissolve the zinc if said raw material is a solid; b) optionally performing solid-liquid separation; c) neutralizing the aqueous solution once the zinc-containing raw material is in liquid form; d) performing solid-liquid separation of the solution rich in zinc from the solids precipitated during the neutralization step; e) extracting the zinc using an acid organic solvent; f) purifying the organic solvent from the extraction step; g) re-extracting zinc from the organic solvent using an acid aqueous solution; h) recovering the zinc by electrolysis and/or crystallization and/or precipitation.

REFERENCES:
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patent: 4124462 (1978-11-01), Reinhardt et al.
patent: 4260722 (1981-04-01), Pfleger et al.
patent: 4401531 (1983-08-01), Martin San Lorenzo et al.
patent: 4552629 (1985-11-01), Duyvesteyn et al.
patent: 4557908 (1985-12-01), Laveyne et al.
patent: 4572771 (1986-02-01), Duyvesteyn et al.
patent: 5858315 (1999-01-01), Van Put et al.
patent: 356136 (1990-02-01), None
patent: WO 9814623 (1998-04-01), None

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